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Order Of 18 July 1991, Amending The Instruction Technique Complementary Mie Apq-001, Relating To Storage Of Flammable And Combustible Liquids.

Original Language Title: Orden de 18 de julio de 1991, por la que se modifica la Instrucción Técnica Complementaria MIE APQ-001, referente a almacenamiento de líquidos inflamables y combustibles.

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TEXT

On 9 March 1982 the Complementary Technical Instruction (ITC) MIE-APQ-001 was approved for the storage of flammable liquids and fuels, which was partially modified by Order of 26 October 1983.

The time spent and the experience gained since these dates has shown the need to update that provision in some of its aspects, such as excluding peroxides from its field of application. In the case of the Commission, the Commission has taken the view that, in the light of the Commission's proposals, the Commission will be able to take the necessary measures in order to ensure that the mobile containers, as well as other minor modifications, which it advises publish all the text of the ITC again.

In its virtue, this Ministry has arranged:

First. -Amend Technical Instruction Complementary to the Chemicals Storage Regulation, MIEAPQ-001 concerning the storage of flammable liquids and fuels, approved by Order of 9 March 1982, and amended by Order of 26 October 1983, which shall be drawn up in the form set out in Annexes I and II to this Order.

Second. -This Complementary Technical Instruction will not be applicable to those installations that at the entry into force of the same already exist complying with the ITC MIE-APQ-001, approved by Order of the Ministry of Industry and Energy of 9 March 1982 (Official Journal of the State No 120 of 20 May).

Third.-The projects of installations referred to in this JTI, which are submitted during the four months following their publication, may be subject, without distinction, to the provisions laid down in this Article or to the in force prior to its entry into force.

Fourth. -1. Regardless of the references to the rules contained in this Instruction, as well as the characteristics of the products, the Ministry of Industry, Commerce and Tourism will accept the legally manufactured utensils and materials. marketed in other Member States of the EEC which, in response to different technical specifications, can achieve safety levels equivalent to those defined by this Technical Instruction.

2. The Ministry of Industry, Trade and Tourism shall regularly update the UNE standards list in this provision, in accordance with the development of the Industrial Safety Centre, in accordance with the development of the technique.

ADDITIONAL DISPOSITION

Regardless of what is established in this provision, for those storage of flammable liquids and fuels which fall within the scope of Royal Decree 886/1988 of 15 July 1988, The prevention of major accidents in certain industrial activities will also apply to them.

What I communicate to V. I. for its knowledge and effects.

Madrid, July 18, 1991.

ARANZADI MARTINEZ

Ilmo. Mr. Undersecretary.

ANNEX I

MMIE-APQ-001 Complementary Technical Instruction, "Fuel flammable and Fuel Storage", of the Chemicals Storage Regulation

FIRST SECTION

GENERALATIONS

INDEX

1. Object

2. Application field

3. Definitions used in this Instruction

4. Product classification

5. Area of facilities

6. Forms of storage

7. Provisional registration

1. The purpose of this Instruction is to lay down the technical requirements for the storage and handling of flammable liquids and fuels.

2. Field of application.-This Technical Instruction shall apply to industrial installations for the storage, handling, loading and unloading of flammable liquids and fuels falling within the classification laid down in paragraph 4, "Product classification", with the following exceptions:

1. º The integrated storage within the manufacturing processes, considering as such the following containers:

a) process teams.

b) containers of power or finished product intermediate products located within the battery limits of the processing units.

The installations in which tankers, tankers or tank wagons of flammable liquids or fuels are loaded/unloaded are considered to be storage facilities even if the loading/unloading is/ processing facilities.

2. The storage of crude oil to its intermediate and refined products, of capacity exceeding 500 cubic meters, located inside a refinery or in a park, either attached to it or intended for use exclusively for the distribution of such products.

3. The storage of liquid fuels, petroleum derivatives, attached to a combustion plant or part of a fuel supply facility or station for automotive and navigation.

4. The LPG (liquefied petroleum gas) or LNG (liquefied natural gas) storage that is part of a service station, a supply park, a distribution facility or a facility combustion.

5. The storage of liquids under cryogenic conditions (strongly refrigerated).

6. º Carbon sulphide stores.

7. The organic peroxides storage.

8. º The product stores whose flash point is greater than 150 ° C.

9. The Product Storage for which specific legal regulations exist.

Also included in the scope of this instruction are the services or the part thereof relating to the liquid storage, for example, the accesses, the drainage of the storage area, the corresponding fire protection system and the purification stations of the contaminated water when they are dedicated exclusively to the storage service.

3. Definitions used in this Instruction.

3.1. Flammable aerosols. -flammable aerosols are considered to be those aerosol generators containing more than 45 per 100 by weight of flammable components or more than 0,25 kilograms thereof.

3.2. Contaminated water. -contaminated water means those that do not comply with the conditions of discharge, in accordance with the legislation in force in this respect.

In general, it is considered that the waters that are in contact with the products, the cleaning of containers, tanks and other similar, as well as the waters of rain and protection against the products, can be contaminated. fires which, on their way to the drain, can be brought into contact with polluting elements.

3.3. Storage. -It is the set of containers of all kinds that contain or can contain flammable liquids and/or fuels, located in an area that includes the tanks and tanks themselves, their holding buckets, the intermediate streets of circulation and separation, the connection pipes and the loading, unloading and transeego areas and facilities.

3.4. Torches. -Installations intended to burn certain gases to the atmosphere in a controlled and safe manner.

3.5. Area of facilities.-Area bounded by the perimeter of the installation concerned.

3.6. Cubeto. -Open container containing in its interior some storage elements and whose mission is to retain the products contained in this element/s in case of rupture of the same or incorrect operation of the system of the handling.

3.7. Tank.-A container designed to withstand a manometric internal pressure of more than 98 kPa (one kilogram/centimetre).

3.8. Sphere. -spherical deposit.

3.9. Liquid. -Any product that at the time of its storage has such a physical state, including those with a fluidity greater than 300 when tested according to the ASTM-D 5 standard, "Penetration test for bituminous materials".

3.10. Fuel liquid. -It is a liquid with a flash point equal to or greater than 38 ° C.

3.11. Unstable liquid. -It is a liquid that can be violently polymerized, decomposed, condensed or reacted with itself, under conditions of shock, pressure or temperature. The unstable character will be lost when stored in conditions or with inhibitors that remove such instability.

3.12. Flammable liquid. -It is a liquid with a flash point of less than 38 ° C.

3.13. Stack. -It is the set of mobile containers not separated by corridors or containers with non-flammable products or whose combustion is endothermic in fire conditions.

3.14. Container. -Any cavity with storage capacity or fluid retention. For the purpose of this ITC, pipes are not considered as containers.

3.15. Resistance to fire. -It is the quality of a constructive element that makes it able to maintain for a certain time the conditions of mechanical stability, stagnating to the flames and fumes, absence of emission of flammable gases and thermal insulation when he is subjected to the action of the fire. This quality is valued for the time that the material maintains the quoted conditions expressed in minutes, and is expressed by the acronym RF followed by the numerical expression of time. Their determination will be made in accordance with the rules UNE 23.093, UNE 23.801, UNE 23.802 and UNE 23.806.

3.16. Tank.-A container designed to withstand a manometric internal pressure not exceeding 98 kPa (one kilogram/centimetre).

3.17. Atmospheric tank.-A container designed to withstand a manometric internal pressure of up to 15 kPa (0.15 kilograms/centimeter square). Air tanks shall not be used to store liquids at boiling or above temperature.

3.18. Tank at low pressure.-A container designed to withstand a manometric internal pressure of more than 15 kPa (0,15 kg/square centimetre) and not more than 98 kPa (one kilogram/centimetre).

3.19. Floating roof tank. -Recient with or without a fixed ceiling that carries a double floating horizontal wall or a metal cover supported by watertight metal floaters (which can be kept afloat even with half of the perforated floats).

3.20. Processing unit. -It is the set of production facilities and facilities.

3.21. Sales. -It is the system designed to prevent the effects of sudden changes in the internal pressure of a storage tank as a result of the operations of the transfer or the variations of the ambient temperature.

3.22. Public communication channels. -These are roads, roads and railway lines for public use and free movement.

3.23. Service routes. -These are the roads, roads, and lines of restricted or regulated traffic.

3.24. Classified areas.-Sites where there are or may be flammable gases or vapours in sufficient quantity to produce explosive or flammable mixtures (standard UNE 20,322).

3.25. Loading and unloading areas. -These are the places where transport units or mobile containers are placed to carry out liquid transfer operations, between the transport units or mobile containers and the storage units or between transport units.

3.26. Open fire zones. -Open fire zones are considered to be those where, sporadically or continuously, flames or sparks are produced in the open air, as well as in which there are surfaces that can reach temperatures capable of producing an ignition.

Indicative and non-exhaustive are considered as open fire zones:

3.26.1. Furnaces, boilers, forges, fixed or mobile gasogens, torches and any combustion system, in general.

3.26.2. Installations with explosion or internal combustion engines used in areas with flammable or explosive environments, which do not carry anti-flagrant protection.

3.26.3. Sites and premises where fire or smoking is permitted, for example: offices, canteens and other similar places.

4. Product classification.

4.1. Class A.-liquefied products whose absolute vapour pressure at 15 ° C is greater than 98 kPa (one kilogram/centimeter manometric), such as propylene, butadiene, methyl chloride, for example.

According to the temperature to which it is stored can be considered as:

4.1.1. Sub-class A1-Products of Class A which are stored liquefied at a temperature below 0 ° C.

4.1.2. Subclass A2. -Class A products that are stored liquefied under other conditions.

4.2. Class B-Products whose flash point is less than 55 ° C and are not included in class A (acetone, amyl alcohol, for example).

According to your flash point they can be considered as:

4.2.1. Subclass B1. -Class B products whose flash point is less than 38 ° C.

4.2.2. Subclass B2. -Class B products whose flash point is equal to or greater than 38 ° C.

4.3. Class C. -Products whose flash point is between 55 °C and 100 °C (phenol, formaldehyde, for example).

4.4. Class D-Products whose flash point is greater than 100 °C.

For the determination of the flash point mentioned above, the procedures prescribed in the UNE 51,024 standard for the products of Class B shall be applied; in standard UNE 51,022, for those of Class C, and in standard UNE 51,023 for those in class D.

If the products of classes C or D are stored at temperature above their flash point, they must meet the prescribed storage conditions for those of the B2 subclass.

5. Facilities area. For the purposes of establishing the facilities areas, the following limits should be considered:

5.1. Processing units: The area that contains the elements defined for the same concept in paragraph 3.20 of this chapter.

5.2. Truck loads and tank wagons: The area containing the load devices in the normal operating position, plus the tanks of all vehicles in the event that they are loaded simultaneously.

5.3. Ship or barge cargo: The area containing the battery of valves and terminal pipes, the arms and the devices of the rest and the rest of the dock or trousers along the ship, for the purposes of measures security.

5.4. Torch: The torch assembly and additional elements.

5.5. Water vapour plants: The edge of the boilers with their recovery elements and smoke ducts, if they are located in the open, or the building that houses them, including the electric power generation turbines if any.

5.6. Electrical substations: The nearest fencing to exist around you, or the boundaries of the building where they are contained.

5.7. Storage tanks and tanks: The area of the projection on the ground, taken from the periphery of the tanks, spheres and similar containers.

5.8. Storage: The area that contains the facilities defined for the same concept in section 3.3 of this chapter.

5.9. Separator rafts: The edge of the raft at full capacity.

5.10. Buildings: The area of the projection of the exterior walls.

5.11. Pumping stations: The area that includes the set of pumps with their drives and valve valve or the minimum value that may be applicable to it or the building that contains them.

6. Storage forms. The storage shall be made in fixed surface containers or buried or in transportable containers. The containers may be located in open air or in open or closed buildings.

7. Provisional registration.

7.1. The project referred to in paragraph 1 of Article 3. of Royal Decree 668/1980 of 8 February shall be composed of the following documents:

7.1.1. Technical memory in which the following paragraphs are found at least:

7.1.1.1. Storage and containers: Describing their capacities, dimensions and other characteristics, stored products and, where appropriate, pressures and temperatures, both service and maximum expected.

7.1.1.2. Systems, equipment and means of fire protection, defining the standards of sizing that are applicable in each case and making the calculations or determinations on them required.

7.1.1.3. Other security features, describing their characteristics and, where applicable, protection of materials against corrosion and/or other hazardous effects.

7.1.1.4. Elements of a trasiego, its characteristics and size.

7.1.1.5. Geographical and topographic aspects of the environment, with particular impact on those natural accidents which may present a risk of land release or water drag; the protection measures provided for in such accidents shall be indicated. cases.

7.1.1.6. Justification for compliance with this Complementary Technical Instruction or for the intended replacement measures.

7.1.2. Drawings, including at least the following:

7.1.2.1. Geographical map (preferably scales 1:25,000 or 1:50,000), in which they will point to the storage and the existing urban nuclei within a circle of 10 kilometers of radius with center in said storage.

7.1.2.2. General plan of the set, in which safety regulatory distances shall be indicated.

7.1.2.3. Drawings of the installations in which the layout of the fire network is indicated and the situation of all fixed fire-fighting equipment and alarm systems.

7.1.2.4. Detailed drawings of each type of container and all safety systems attached to it.

7.1.3. Budget.

7.1.4. Instructions for the use, preservation and security of the facility as regards persons and property.

7.2. The submission of a project shall not be required where the storage capacity is lower than the following, but in any case compliance with the safety standards set out in this JTI.

Class A products, 85 liters.

Class B products, 100 liters.

Class C products, 200 liters.

Class D products, 400 liters.

7.3. For storage equal to or greater than those indicated, but less than the following:

Storage in mobile containers:

Interior
-
Liters

Foreign
-
Liters

A Products

300

600

Class B Products

750

1,500

C products

1,500

3,000

Class D Products

3,000

6,000

Storage in both indoor and outdoor fixed deposits.

Class A products, 300 liters.

Class B products, 750 litres.

Class C products, 1,500 litres.

Class D products, 3,000 litres.

The project may be replaced by a letter signed by the storage owner or his legal representative, stating the products to be stored, the characteristics of the products and the description of the warehouse, as well as the means of protection to be disposed of, which in any case must comply with the provisions of this ITC.

SECOND SECTION

STORAGE IN FIXED CONTAINERS

CHAPTER I

General Conditions

INDEX

1. Types of storage

2. Design and construction

3. Normal and emergency vents

4. Pipe systems

5. Installation of buried containers

6. Installation of containers inside buildings

7. Testing

8. Containers in flood areas

1. Storage types.-The containers for storage of flammable liquids or fuels may be of the following types:

1.1. Air tanks. -Designed to withstand a manometric internal pressure of up to 15 kPa (0.15 kilograms/square centimeter).

Atmospheric tanks will not be used to store liquids at boiling or above temperature.

1.2. Tanks at low pressure. -Designed to withstand a manometric internal pressure of more than 15 kPa (0,15 kg/square centimetre) and not more than 98 kPa (l kilogram/square centimetre).

1.3. Pressure tank.-Designed to withstand a manometric internal pressure greater than 98 kPa (1 kg/square centimeter).

Pressure tanks can be used as low pressure tanks and both as atmospheric tanks.

2. Design and construction.

2.1. Construction materials. -tanks and tanks shall be constructed in steel, except in the cases provided for below in which different materials may be used:

2.1.1. When the properties of the stored liquid require it. In case of doubt the projectionist, the producer, distributor or other competent consultant will certify the convenience of the construction material to be used.

2.1.2. For underground facilities.

2.1.3. When used exclusively for class D liquids.

2.1.4. For liquids of classes A, B or C where there is no possibility of leakage, if stored on the outside, or an appropriate automatic fire extinguishing system is available, if stored inside a building.

The coated concrete containers may be used to store liquid liquids with a density of 40 degrees AP1 or higher. With the use of special coatings, they can be used in other services when the design is in accordance with good practice.

Special consideration will be given to the choice of material when the stored liquid is below 0 ° C.

2.2. Design standards.-The containers shall be designed according to codes or standards of recognised solvency. When applicable, the Regulations to Pressure Regulations shall be complied with.

In containers intended to contain corrosive liquids, an overthickness of corrosion or an appropriate paint or coating shall be provided to compensate or prevent loss of thickness during the life of the container.

The actions to be taken into account in the design will be those indicated in the design code or procedure, but at least the following are the following:

-Total weight full of water or liquid to be contained when the density of the water is greater than that of the water.

-Pressure and interior design depression.

-Usage Overload.

-Snow and wind overload.

-seismic actions.

-Effects of the rain.

2.3. Manufacture.-Fixed containers may be of any form or type, provided they are designed and constructed in accordance with codes or standards of recognised solvency. During manufacture, inspections and tests shall be carried out on the chosen code or standard.

2.4. Supports, foundations and anchorages. -tanks or fixed tanks will be supported on the floor or on foundations of concrete, steel, factory work or piles. The foundations will be designed to minimize the possibility of unequal settlements and corrosion in any part of the container supported on the foundation.

The supports of the containers containing liquids of Classes A, B and C shall be of concrete, factory work or protected zero. For surface containers, horizontal wooden planks may be used in a single layer of not more than 300 mm in height.

Steel supports or columns for liquid containers of classes A, B and C shall have a fire resistance RF-180, unless their vertical dimension is not more than 300 millimetres from the lowest point.

Each tank or tank will be supported in such a way as to avoid unadmissible concentrations of efforts in your body.

When necessary, the containers may be subject to the foundations or supports by means of anchorages.

In the areas of possible seismic activity, the supports and connections will be designed to resist the efforts that result from it.

When containers are in areas that may be flooded, the precautions referred to in paragraph 8, "Startups in flood areas", shall be taken from this chapter.

2.5. Other connections.-The connections to a container by which the liquid can circulate normally will carry an internal or external valve located closest to the container wall.

The connections below the level of the liquid, through which it normally does not circulate, will lead to a tight closure. This closure may be a valve, plug, or blind flange or a combination of these.

Manual-level openings for Class B liquids will carry a steam-tight plug or closure, which will only open at the time of the level measurement.

Input connections in containers intended to contain Class B liquids shall be designed and installed to minimize the possibility of generating static electricity. The filling pipe when it enters the top of the container shall be extended into the container until a height of less than 150 mm from the bottom of the container is finished and shall be installed in such a way as to avoid excessive vibration.

Points where connection or joining of pipes or hoses, for filling, emptying or other similar purposes of liquids of classes A, B and C are carried out shall be located outside the buildings, in an area free of sources of ignition and at a distance not less than 1,5 metres from any opening of the buildings. These points, for liquids of any kind, shall be kept properly identified and sealed when they are not in use.

3. Normal and emergency vents.

3.1. Normal vents.-Any atmospheric storage tank must have systems of vents to prevent the formation of vacuum or internal pressure, in such a way that the deformation of the ceiling or the walls of the tank is avoided as a consequence of filled, emptied, or room temperature changes.

Normal sales of a container shall be sized according to codes of recognised solvency or at least a size equal to the largest of the filling or emptying pipes and in no case less than 35 millimetres internal diameter.

Low pressure tanks and pressure tanks shall have a suction system to prevent excessive internal pressure or vacuum over design, as a result of filling, emptying or changing room temperature.

If any tank or tank has more than one fill or flush connection, the vent dimension will be based on the maximum flow possible.

The output of all vents in containers that allow for manometric pressures greater than 15 kPa (0,15 kg/square centimetre) shall be available in such a way that the discharge, in case of inflaming, cannot produce reheating. local or fire incited on any part of the container.

Tanks and tanks which store liquids with a boiling point not exceeding 38 ° C shall be equipped with wind devices, which shall be normally closed, except when the atmosphere is vented in the internal pressure or vacuum conditions. Tanks and tanks which store class B liquids with a boiling point greater than 38 °C, shall comply with the above condition but may have open vents when they are equipped with power-off.

The quench referred to in the preceding paragraph may be omitted when the conditions are such that its use may cause serious damage to the tank in the event of obstruction. The properties of the liquids that justify the omission of these devices include condensation, corrosion, crystallization, polymerization, freezing or other like. When any of these conditions exist, account should be taken of the use of heat, use of devices with special construction materials, hydraulic closures, inertization and other equivalents.

Atmospheric surface tanks with a capacity of not more than five cubic meters that store Class B products, whatever their boiling point, may have open vents.

3.2. Emergency vents. -Any tank or surface storage tank will have some constructive shape or device to relieve the excess internal pressure caused by an exterior fire. In vertical tanks, the constructive form, can be of floating roof, sliding roof, weak union of the ceiling or any other solution established in codes of recognized solvency.

3.2.1. Tanks larger than 50 cubic meters of capacity that store class D liquids and are not located within a cubeto or close to a liquid evacuation channel of classes A, B and C do not require emergency vents.

3.2.2. When the emergency vent is entrusted to a valve or device, the total capacity of the normal and emergency vents shall be sufficient to prevent any overpressure that may cause rupture of the body or bottom of the container if it is vertical, or body and heads if horizontal. If the stored liquids are unstable, account shall be taken of the effects of heat or gases produced by polymerization, decomposition, condensation or reactivity.

The emergency vent is related to the wet surface of the container that may be exposed to an exterior fire. This area shall be calculated on the basis of 55 per 100 of the total area of a sphere, or 75 per 100 of the total area of a horizontal deposit and the first 10 metres above the ground of a vertical tank, the part of which shall be deducted surface that is in contact with the ground.

The total capacity of both vents, the emergency plus the normal one, shall be no less than those defined in Table I-1, except as provided for in paragraph 3.3. "Total sale calculation for stable liquids" of this chapter.

For atmospheric buffers designed for manomeric pressures above 7 kPa (0.07 kilograms/square centimeter) the I-2 table shall be used when the wet surface is greater than 260 square meters.

For pressure tanks, the emergency vent will allow to output the vapours produced by effect of the received heat, without being able to increase the pressure inside the tank by more than 10 per 100 of the maximum pressure of the design. The calculation shall be made in accordance with paragraph 3.3.2.

TABLE I-1

Total tank vent capacity with pressure up to 7 kPa (0.07 kilograms/square centimeter)

surface (in m2)

m3/air time

Surface wet (in m2

m3/air

2

636

50

10.330

4

1.272

60

11.453

6

1,909

70

12.497

8

2,544

80

13,478

10

3.180

90

14,408

12

3,816

100

15.293

14

120

16,000

16

16

140

18

18

18

18

160

160

160

Centro_table_body " > 17.624

20

6.360

180

18.340

25

6,978

200

19,000

30

230

19,924

35

8.441

260 and higher

20,767

40

9.104

Air flows are at atmospheric pressure and 15 ° C.

Intermediate values can interpolate.

TABLE I-2

Tank suction capacity with pressure greater than 7 kPa (0.07 kilograms/square centimeter)

surface (in m2)

m3/air time

Surface wet (in m2

m3/air

280

22,340

1,000

63,450

300

23,640

1,500

88,480

330

25,250

2,000

112,000

360

27,460

2,500

134,500

400

29,930

3,000

156.193

450

32,970

4,000

197,774

500

35,940

600

41,740

For higher values:
At 220 x A0.82

700

47,360

800

52,840

900

58,200

Air flows are at atmospheric pressure and 15 °C.

Intermediate values can interpolate.

For values less than 280 m2 see Table I-1.

3.2.3. The output of all the vents and their drains, in containers that allow manometric pressures of 15 kPa (0,15 kg/square centimetre), shall be available in such a way that the discharge, in the case of inflaming, cannot produce local reheating. or that incites anywhere in the container.

3.2.4. Each vent device must be stamped on it, the opening pressure, the pressure at which the valve reaches the fully open position and its suction capacity in the latter position.

3.3. Calculation of the total vent for stable liquids.

3.3.1. In the case of atmospheric storage or at low pressure the total capacity of the vent can be determined by the following formula:

m3 air per hour = 4,414 x Q

L x -M-

Where:

Q = heat received, according to section 3.3.3 in kJ/h.

L = latent heat of vaping in kJ/kg.

M = molecular weight in kg.

Or by multiplying the capacity given by tables I-1 and I-2 by factor F as defined in paragraph 3.3.3.

3.3.2. In the case of pressure tanks, the total wind capacity shall be:

kg/h liquid vapor = ---

Where:

Q = heat received according to 3.3.3 in kJ/h.

L = latent heat of vaporization in kJ/kg in the windy conditions.

3.3.3. The heat received in case of external fire Q is determined by:

Q = 139.7 x F x A0.82 x 103

Where:

Q = heat received by the canister in kJ/h.

F = factor without dimensions.

A = wet surface in m2.

Factor F will be taken equal to the unit, except in the following cases, in which the values that are indicated will be taken:

Factor F

drain or separate cubeto and wet surface greater than 20 m2

0.5

System of fixed and automatic water sprayers for fire prevention and separate cubeto

0.5

Isolation not affected by fire or water jet and with a maximum thermal conductivity at 900 °C of 83.75 kJ/h/m2/° K (20 kcal/h/m2/ºC)

0.5

Isolation equal to the previous and automatic and fixed water spray system

0.15

3.4. Vent pipes. The wind pipes shall be constructed in accordance with paragraph 4, "Tube systems", of this chapter.

vent pipes for vessels storing liquids of classes A, and B1, close to buildings or roads for public use, shall be so located that the vapours are discharged to a safe place outside the buildings and to the a height of more than 3,6 metres above the adjacent level and at least 1,5 metres from any opening of a building.

Vents exits will end above the normal level of snow and may carry elbows or other devices to minimize the entry of foreign materials.

You will avoid clogging the vent pipes with mechanisms that lead to an increase in the discharge pressure.

Connections to other vessels except for vapor recovery, or air pollution control shall be avoided. The liquid vents of Class A and subclass B1 shall not be connected with those of subclass B2 and classes C and D unless there are devices which prevent the vapours from being passed to the other tanks or the classification of the other tanks is changed. seconds. The interconnection of vents between containers with incompatible products is not permitted.

When locking valves are installed in vent pipes, they must allow, in any position, always an outlet to the atmosphere, safety valve or vape collection system.

4. Pipe systems.

4.1. General. -For pipe systems the set of pipes, flanges, joints, valves, screws and fittings of pipes subjected to the pressure of the liquid are understood.

The design, manufacture, assembly, testing and inspection of pipeline systems containing flammable liquids and fuels will be suitable for expected working pressure and temperature and for maximum effort. combined due to pressures, dilations or other similar conditions under normal or transient conditions of commissioning and/or abnormal emergency situations.

When liquid is trapped between equipment or sections of pipes and there is a possibility that this liquid will be dilated or evaporate (e.g. between blocking valves) a relief system must be installed to prevent it from reaching pressure higher than the design of the equipment or pipe provided that the amount of the trapped quantity exceeds 50 litres.

Engine or vehicle pipeline systems, boilers, building services and the like are excluded from the above requirements.

The pipe systems handling liquids of classes A and B shall have electrical continuity, with any system guaranteeing a lower ground strength value of 10Ω except in the pipe flanges with cathodic protection.

4.2. Materials for pipes, valves and accessories. -Piping materials, valves and accessories shall be suitable for the pressure and temperature conditions compatible with the fluid to be transported, and designed in accordance with the principles of good practice or codes of recognised solvency.

The valves attached to the containers and their connections shall be of steel or nodular casting, except in the case of incompatibility of the liquid stored with said materials. When the valves are installed outside the container, the material must have a ductibility and melting point comparable to steel or nodular casting in order to be able to reasonably withstand the stresses and temperatures due to exposure to a fire.

Materials other than steel or nodular casting may be used when the valves are disposed within the container.

Cast, bronze, copper, aluminium or similar materials for class D liquids may be used when the container is installed on the outside and in the same cubeto there is no storage of classes A, B or C.

Materials for low melting point piping systems (such as aluminium, copper, bronze) or which are fused in the case of fire (plastics) or which are not ductile (cast iron, porcelain, among others) may be used in buried facilities. They may also be used outside and outside buildings on systems with Class D liquids and in other cases where the following conditions are met:

-Proper fire exposure protection.

-Located so that any leakage due to failure does not expose to person, important buildings or structures.

-Located where a leak is rapidly controlled by acting on one or more accessible valves, and operable safely in case of leakage.

4.3. Pipe joints. -The joints will be watertight. Welded, engaged, threaded joints or any other suitable connection to the service shall be used. All pipe joints for liquids of classes A and B, located in hidden or inaccessible places within buildings or structures, shall be welded.

4.4. Supports. -Piping systems will be adequately supported and protected against physical damage and excessive efforts due to vibration, dilation, contraction or settling.

4.5. Protection against external corrosion. -Piping systems for flammable liquids or buried or surface fuels shall be painted or protected, when subjected to external corrosion.

4.6. Valves. -Pipeline systems will have sufficient number of valves to operate the system properly and protect the assembly. Critical valves must have a position indication.

Pipes that discharge liquids into storage will carry check valves for protection against return, if the arrangement of the pipes makes it possible.

5. Installation of buried containers.

5.1. Situation.-The buried containers will be housed in pits prepared for the effect, avoiding the collapse of existing foundations. The situation with respect to foundations of buildings and supports shall be such that the loads of buildings and supports are not transmitted to the container. The distance from any part of the container to the nearest wall of a basement or pit, to the property limits or to other tanks, shall not be less than one metre. When located in areas that may be flooded, the precautions referred to in paragraph 8 of this Chapter shall be taken.

5.2. Burial and covering.-The buried containers will be provided in firm foundations and surrounded by a minimum of 250 millimeters of inert, non-corrosive materials, such as clean sand washed or well compacted gravel. The container will be placed with due care inside the pit to prevent damage to the tank, its necks, insulation and other elements.

The containers will be covered with a minimum of 600 millimeters of earth or 300 millimeters of earth plus a 100-millimeter-thick reinforced concrete slab.

When there may be traffic of vehicles on the buried vessels, at least 900 millimeters of land shall be protected, or with 450 millimeters of ground and above a slab of reinforced concrete of 150 millimeters of thickness or 200 millimeters of asphalt agglomerate. Protection with concrete or asphaltic agglomerate shall extend at least 300 millimetres outside the periphery of the container in all directions.

5.3. Corrosion protection.-The walls of the container and its pipes shall be protected against external corrosion by any of the following methods:

5.3.1. Use of paints or coatings.

5.3.2. Cathodic protection.

5.3.3. Use of corrosion resistant materials.

5.4. Vents.-The vents of buried vessels shall comply with the provisions of the headings 3.1 "Normal windows" and 3.4 "suction tubes".

5.5. Other connections. -Different connections to the vents will comply with paragraph 2.5 with the following exceptions:

5.5.1. All connections to the buried container will be watertight.

5.5.2. The filling and unloading pipes will only enter the top of the container. -Fill lines will have slope to the container.

5.5.3. The openings for manual level measurement, if different from the filling pipe, will carry a stopper or seal to the liquid, which will only open at the time of the level measurement.

6. Installation of containers inside buildings.-Storage in fixed containers inside buildings or closed structures will only be allowed if the installation of surface containers or buried outside is not practical due to local requirements or considerations such as: temperature, high viscosity, purity, stability, hygroscopicity, sensitivity to temperature changes or the like, which should be justified in the project.

Fixed storage containers inside buildings will be located on the ground floor or upper floors. In basements only liquids of classes B, C and D may be stored in buried or liquid containers of classes C and D in surface containers.

6.1. Characteristics of the buildings. -The building will be constructed in such a way that the storage area and surrounding walls with other buildings or adjacent buildings have a fire resistance of at least RF-90. Walls that limit with process areas, risk zones or other properties must have at least one resistance to the fire RF-120.

The surface containers will be in areas where the floor and the first 100 millimeters of the walls around the entire room or storage area are watertight. Alternatively the floor may be with slope and drain to a safe place.

All the areas mentioned will require two separate accesses, when the actual maximum travel (sorting any obstacle) at the nearest exit, exceeds 25 meters. In no case shall the disposal of the vessels prevent normal emergency exits, nor shall they prevent access to equipment or areas intended for safety.

Steps to other dependencies will have fire-resistant, automatic firewall doors an hour and a half (RF-90).

Natural or forced ventilation will necessarily be available.

In case of liquids of classes A and B1 the ventilation shall be forced with a minimum of 0,3 cubic meters per minute and square meter of enclosure surface, and not less than four cubic meters per minute.

The electrical installation will be in accordance with the requirements of the Electrotechnical Regulation for Low Tension and its accompanying Technical Instructions, in particular with MI-BT-026, " Special provisions for premises of premises with a risk of fire or explosion ', or other regulations providing equivalent safety.

6.2. Sales of surface vessels located within buildings shall comply with the provisions of paragraph 3 of this Chapter, except that for emergency vents the use of a floating roof, a movable roof or a union is not permitted. weak from the roof.

All vents shall terminate outside the buildings, except for class D liquids, which may terminate within the buildings.

6.3. Other connections. -Different connections to the vents will comply with paragraph 2.5 of this chapter, with the following exceptions:

6.3.1. All connections to the container will be watertight.

6.3.2. In surface containers containing Class A liquids and sub-class B1, whatever their capacity, and sub-class B2 and Class C liquids, with a capacity of more than 35 cubic metres, each connection below the level of the liquid shall be available. a heat-driven automatic closing system except for connections to be kept open in emergency cases and in the storage of buildings in a plant with automatic fire protection systems. This automatic closing system may be installed on the closing valve of the connections that require it.

6.3.3. Storage containers of Class A, B and C liquids, inside buildings, shall be equipped with devices to prevent an overfill of the building by overfilling. These devices may be: float valve, pre-selection meter in the filling line, valve actuated by the weight of the container contents, low pressure pump unable to reach the level of refuel, blight pipe that discharges to a safe place or other equivalent system.

7. Tests.

7.1. Containers. -All containers shall be tested before they are put into service and, if appropriate, in accordance with the requirements of the Regulations of Appliances to Pressure and the specifications of the chosen design code.

When the vertical height of the filling or suction pipes is such that when the pressure is filled with liquid the manometric pressure in the bottom exceeds 69 kPa (0,7 kg/centimetre square) the container and its pipes shall be tested hydraulically, at least, to the static pressure to which they may be subjected.

In special cases where the height of the vents is excessively high, they must be tested at a static pressure equal to that corresponding to the maximum level of liquid limited by suitable devices.

In addition to the previous tests all the containers and connections will be tested to stagnity. Except for buried containers, this tightness shall be performed at the operating pressure with air, inert gas or water, before the tank is put into service. In tanks constructed "in situ" the proof of stagnity can be considered within the ones mentioned in the first two paragraphs. Buried atmospheric tanks shall be tested before being covered or put into service, with water or air at a manometric pressure of more than 20 kPa (0,2 kg/square centimetre) and not more than 34 kPa (0,35 kilograms/square centimetre).

Before putting the container into service, all leaks and deformations will be corrected in an acceptable manner for the design code or standards. Leakage correction is not permitted, in welded containers, by mechanical retching, except in ceiling pores.

Containers that are going to work at lower than design pressures can be tested taking into account the pressure developed in case of emergency total sales.

7.2. Pipes, valves and fittings.-The pipes, valves and fittings shall be tested before being covered, buried or put into service according to the design codes: by a hydrostatic test at 1,50 times the maximum expected pressure in the system, or by a pneumatic test at 1.10 times the maximum expected pressure but not less than 34 kPa (0,35 kilograms/square centimetre) at the highest point of the system. The test pressure will be maintained until you complete the visual inspection of all the points and connections, but never less than ten minutes.

8. Containers in flood areas. -The measures outlined below are applicable for the protection of storage containers of liquids that can float due to the elevation of the water level in the area where they are installed.

8.1. Provision should be made for adequate water supply to fill in the partially empty containers.

In vertical tanks it is convenient, in addition the installation of some guides to allow the flotation of the tank and avoid horizontal displacements.

In horizontal or vertical deposits of small dimensions, or in buried containers, anchoring in concrete or steel foundations and concrete with sufficient weight to resist the thrust of the empty container is recommended. completely submerged in water or will be ensured by other procedures.

It is appropriate to protect the spheres and other types of deposits equivalent to vertical tanks or horizontal deposits.

8.2. When the public water supply is not sufficient or reliable, an independent water source can be used.

The pumping capacity is designed so that the filling rate of all the tanks is equivalent to the predicted rate of elevation of the outer water.

8.3. The guides for allowing the flotation of the container must be of non-combustible material and designed to withstand a horizontal effort in any direction equivalent to at least 1,23 kPa (0,0125 kilograms/square centimetre) applied to the area of the vertical section of the container. If the flood is expected to produce water current, the horizontal effort must be at least 2.46 kPa (0.0250 kilograms/square centimeter) over the same area above.

8.4. It is recommended that pipe connections below the liquid level carry valves or closures as close as possible to the tank, using non-fragile materials.

CHAPTER II

Distances between installations and between containers

INDEX

1. Distance between installations in general

2. Distance between containers

1. Distance between installations in general.-The minimum distances between the various installations that make up a storage and from these to other external elements may not be lower than the values obtained by the application of the following procedure:

A. In Table II-1, obtain the distance between the two facilities to be considered.

B. In Table II-2, obtain the possible reduction coefficient based on the total capacity of the storage and apply it to the distance obtained in A.

C. In Table II-3, obtain the possible multiplying coefficient, if applicable, and apply it to the resulting distance in B.

D. Apply the criteria of Table II-4, to the resulting distance in C.

E. The distances thus obtained may not be less than two metres, except for distances between installations which may contain liquids (containers, loaders and separator rafts) and concepts 6, 10 and 11 of Table II-1, which may not be less than:

Subclass B1 = 12 meters.

Subclass B2 and class C = 8 meters.

When in any Complementary Technical Instruction of the Chemicals Storage Regulation distances to/or from specific points are established, the distances between them shall be given priority to the values obtained by following this procedure.

If there are torches, these shall be at a minimum distance of 60 metres from any installation, except for concept 11 of Table II-1 to which it will be less than 100 metres. Your distance to concepts 1 and 6 of the above table is not the subject of this chapter.

The measurement effects of these distances are considered the boundaries of the areas of the facilities as defined in Chapter I. 5.

The variation in total storage capacity as a result of new enlargements forces the modification of distances in existing installations, unless the person concerned justifies that there is no risk of (a) a serious additional certification by an Inspection and Control Entity for the application of the Chemicals Storage Regulation.

Separate installations, for the purposes of Table II-2, are considered to be those in which their vessels distance from each other more than the distance corresponding to concept 6 in Table II-1.

TABLE II-1

Distance in meters (11) between fixed surface installations in storage with capacity greater than 50,000 m3

1

(1)

 

1. Processing units.
2. Pump stations.
3.1 Storage Tanks. Class A (tank walls).
3.2 Storage Tanks. Class B (tank walls).
3.3 Storage Tanks. Class C (tank walls).
3.4 Storage Tanks. Class D (tank parts).
4.1 Charging and unloading stations. Class A.
4.2 Loading and unloading stations. Class B and C.
4.3 Charging and unloading stations. Class D.
5. Separate rafts.
6. Horns, boilers, incinerators.
7. Administrative and social buildings, laboratories, workshops and other independent buildings.
8. Stations for pumping water against fires.
9. Value of the plant.
10. Limit of external properties in which they can be built and public communication channels.
11. Local and foreign establishments of public concurrency.

2

(3)
20

(2)

60

(4)
30

(6)

3.2

30

(4)
15

(6)

(6)

 

3.3

Centro_table_body "> 30

(4)
15

(6)

(6)

(6)

 

3.4

10

(4)
10

(6)

(6)

(6)

(6)

60

(5)
30

(7)
30

(7)
30

(7)
30

(7)
30

(2)

4.2

30

(5)
20

(7)
30

(7)
20

(7)
15

(7)
15

30

(2)

4.3

20

(5)
15

(7)
25

(7)
20

(7)
15

(7)
10

30

(2)

(2)

 

5

30

(5)
15

30

20

15

10

30

20

15

(1

6

(1)

30

60

30

30

30

20

20

20

20

20

15

30

(1)

7

(1)

20

60

30

20

15

40

20

15

15

20

8

(1)

20

60

30

25

10

30

30

25

20

20

9

(1}

15

30

20

15

10

30

20

15

(9)
20

8)

10

(1)

20

60

30

25

10

60

(10)
40

(10)
20

20

(8)

11

(1)

30

100

60

40

20

100

60

30

40

(8

1

2

3.1

3.3

3.3

3.3

4.1

4.2

4.3

5

6

(1) This is not the subject of this Regulation.

(2) No special distances requirement.

(3) Belonging to storage park.

(4) Except for pumps for transfer of products which are capable of being stored in the same cubeto, in which case it is sufficient that they are located outside the cubeto. (In special cases, for example, by reducing the risk, the pumps could be placed inside the cubeto).

(5) Except for the transfer pumps of this installation.

(6) See Table 11-5 'Distance between container walls' (at the distances set in the table the criteria of tables II-2 II-3 and II-4) are not applied.

(7) Except for auxiliary power or direct bearing tanks of the load with capacity less than 25 m3 which may be at distances not less than:

Class A = 15 m, classes B and C = 10 m and class D = 2 m.

(8) See Rules of Recients to Pressure.

(9) If the fencing is factory work or concrete and height not less than 1,5 m this distance does not need to be greater than 10 m.

(10) With regard to the track of the railway from which a parking lot is derived for loading or unloading of tank wagons, this distance can be reduced to 15 m with a solid wall fencing located 12 m from the load and height such that it protects the installation.

(11) The distances between storage tanks and other facilities shall be considered individually according to the class of the product stored in each tank and not of the overall cubeto classification.

TABLE II-2

Capacity Reduction Coefficients

Total Capacity

of the installation

(in m3)

Coefficient

for reduction

of distances

in Table II-1

> = 50,000

1

50,000 > Q > = 20,000

20,000 > Q > = 10,000

0.90

10,000 > Q > = 7,500

7,500 > Q > = 5,000

0,80

5,000 > Q > = 2,500

2,500 > Q > = 1,000

1,000 > Q > = 500

500 > Q > = 250

250 > Q > = 100

0.50

100 > Q > = 50

50 > Q > = 5

5 > Q

0.20

Note 1: It will not be computed for total capacity effects of the installation that may exist in mobile containers or buried containers.

TABLE II-3

Multiplier Coefficients

and/or storage specific features

Coefficient

Liquid Classes

to which it is

applicable

Unstable liquids

2.0

A-B-C-D

Storage with emergency vents that allow the development of pressures greater than 15 kPa (O, 15 kg/cm2

1.5

B-C-D

After application of these coefficients, simultaneous application where appropriate, the distances obtained do not need to be greater than 150 meters for Class A liquids, 100 meters for Class B liquids and 75 meters for those of classes C and D.

For unstable liquids of classes A, B and C, the distance from tanks or loading/unloading stations to concepts 6, 7, 8, 10 and 11 of Table II-1 shall not be less than 45 metres, after application of the coefficients of this Table II-3.

TABLE II-4

Reductions in distances between fixed surface installations by additional protection to the mandatory requirements set out in Chapter IV

or protection systems adopted

Reduction Coefficient

Level

Quantity

0

-

No reduction

1

1

Two or more

2

One or more

0.50

The minimum distances between fixed surface installations for products of Class B, C and D may be reduced by the adoption of additional fire protection measures and systems. The reduction distances are those corresponding to the element of the installation with additional protection for others with or without additional protection.

The following protection levels are defined for reductions effect:

Level 0. Mandatory protections under Chapter IV.

Level 1. Fixed fire extinguishing systems for manual and/or personal fire, applied to installations that may be damaged by fire.

They can be:

1. RF-120 firewall walls located between installations.

2. Fixed systems of pulverized water, applied by means of nozzles permanently connected to the fire network, with drive located more than 10 metres from the installation protected and designed in accordance with UNE 23501 to UNE 23507, both inclusive.

3. Fixed foam systems for the flood or cover of the installation element considered, with drive located more than 10 metres from the installation protected and designed in accordance with UNE 23521 to UNE 23526, both inclusive.

4. Other fixed manual-operated fire-extinguishing systems (e.g. dry powder, CO2) specially suited to the protected risk and designed in accordance with the relevant UNE standards.

5. Fire-fighting brigade of its own (made up of specially trained personnel in fire protection through appropriate, periodic and demonstrable training) including appropriate means to be determined in particular, a plan of self-protection, as well as proper coordination with a fire service.

It is equivalent to the above location of the plant in zone specifically dedicated to this type of facilities (such as areas of flammable and similar) and with a minimum distance to urban inhabited areas of 1,000 meters. This area must have good access by road, with a fire service less than 10 kilometres and less than 10 minutes for access to them and with an appropriate warning system.

The existence of a mutual aid scheme, in the event of an emergency, will be assessed positively for these purposes, as it is put into effect between different entities located in the vicinity.

6. Water systems D.C.I. (network, reserve and pumping means) with reserve capacity and flow rates 1.5 times the required design.

7. Having a network of D.C.I. in accordance with Chapter IV of Chapter IV of this JTI facilities which are not required. Such a network shall be capable of providing at least a flow of 24 m3/h of water.

8. Have means to pour, efficiently and quickly, foam into the area of storage considered, facilities that are not required to do so.

A minimum application capacity of 11.4 m3/h will be available for at least 30 minutes.

9. Provide sufficient hydrants for each point in the risk zone to be covered by two hydrants, which are also conveniently located to act in an alternative manner in case of a disaster that may affect one of them.

10. Other equivalent effectiveness which may be proposed, in a reasonable and justified manner, in projects.

11. Automatic detectors fixed, with alarm, of explosive mixtures (directly or by means of concentration) in the area surrounding the installation.

Level 2. Fixed automatic drive systems applied to installations containing liquids.

They can be:

1. Fixed systems of permanent inertization by means of inert gas atmosphere inside the storage containers.

2. The systems referred to in points (2), (3) and (4) of level 1, but equipped with automatic detection and actuation.

3. Installations that are not required, have a D.C.I. network with automatic pressurisation pump, exclusive supply for this purpose and for a minimum of 2 1/2 hours with a minimum flow rate of 60 m3/h and minimum pressures as specified in point 2 of Chapter IV.

4. Double reserve and double foam application capacity resulting from calculation in the ITC.

5. Fixed monitors that protect the surrounding areas to the facility deemed to be available for the water flow required for the feeding of the same.

6. For sub-class B1 products: Floating roofing in the storage tank and fixed foam system, manually operated.

The adoption of more than one level 1 measure or system (for example: firewall wall, fixed systems or fire fighting brigade) is equivalent to the adoption of a level 2 measure or system.

Only one (and for one time) can be applied from among the reductions listed in Table II-4.

2. Distance between containers.

The distance between the walls of the containers shall be as shown in Table II-5.

TABLE II-5

Distance between container walls

Note 2.

Note 2.

Note 2.

Note 2.

rowspan="2">

B

class

Types of containers over which distance is applied

Minimum distance (D = Dimension by note 1)

Observations

A

A. 1

Between Tanks and Refrigerated spheres.

1/2 of the sum of the canister diameters.

Note 2.

To containers for products in classes A. 2, B, C, or D.

D (minimum: 15 m).

Note 2.

A. 2

Between pressure vessels for products in the subclass A. 2.

1/4 of the sum of the diameters of the canisters with a minimum of 2m.

Note 2.

D (minimum: 15 m)

Note 2

A canisters for class products B, C, or D.

Same cubeto.

0.5 D (minimo; 1.5m). The value can
be reduced to 25 m if higher.

Note 5

Cubes.

0.8 D (minimo; 2m). The value can be reduced to 25 m if it is higher.

Note 5

C

A containers for products of classes C or D.

0,3 D (minimo; 1,5 m). The value can be reduced to 17 m if it is higher.

Note 5

D

To containers for D.

0.25 D products (minimum: 1.5 m).

Note 3.

Note 4.

Note 5.

Unstable liquids

To containers for products of any class

D (minimums: those indicated above according to its classification A1, A2, B, C or D).

Note 1. -D shall be equal to the diameter of the container, unless its generatrix is greater than 1.75 times the diameter, in which case the semi-summation of generatrix and diameter shall be taken as D.

The value of D to consider will be the one that, once applied the distances of frame II-5, from place to the greater distance.

Note 2.-When the total storage capacity is less than 100 m3 , the distances set out in Chapter VIII "Specific characteristics for storage of class A products" shall be considered as This table shall apply.

Note 3. -If the storage of these products is effected at temperatures above its flash point, the distances between the tanks will be maintained according to the precept for the products of class B.

Note 4. -If the storage of these products coexists with that of classes B or C, within the same cubeto, the minimum distance shall be 0,3 D (minimum: 1.5m).

Note 5. The minimum distance limit may be reduced to one meter for Class B, C or D products, when the capacity of the tanks is less than 50 m3.

Note 6. -If the tanks are horizontal cylindrical and arranged in parallel (battery) the minimum distance of separation between the generatrices of the same shall be based on the diameter exclusively.

In case of online disposition, note 1 will be considered for applying the table.

TABLE II-6

Reductions in distances between containers by additional protections to those required in Chapter IV

measures or systems
adopted

Reduction Coefficient

Level

Quantity

0

No reduction.

1

0,90

1

Two or more

0,80

2

0,80

2

Two or more

0,70

Minimum distances between containers for class B, C and D products can be reduced by adopting additional fire protection measures and systems.

The reduced distances are those for the container with additional protection against another that has additional protection.

For reduction purposes, the following protection levels are defined:

Level 0. Mandatory protections under Chapter IV.

Level 1. Fixed fire extinguishing systems for manual actuation and fire fighting brigade.

They can be:

1. RF-120 firewall walls located between the containers.

2. Fixed pulverized water systems applied to the containers by means of nozzles permanently connected to the fire network, operated from the outside of the cubeto and designed in accordance with UNE 23501 to UNE 23507, both inclusive.

3. Fixed physical foam systems permanently installed, operated from the outside of the cubeto and designed in accordance with UNE 23521 to UNE 23526, both inclusive.

4. Fire-fighting brigade of its own (made up of specially trained personnel in fire protection through appropriate, periodic and demonstrable training) including appropriate means, which must be determined specifically, and a self-protection plan, as well as coordination, appropriate with a fire service.

It is equivalent to the previous location of the plant in an area specifically dedicated to this type of facilities (such as flammable), and with a minimum distance to urban inhabited areas of 1,000 meters. The area shall have good access by road and fire service less than 10 kilometres and less than 10 minutes for the access of firefighters with an appropriate warning system.

The existence of a mutual aid scheme in the event of an emergency, put into effect between different entities located in the vicinity, will be positively assessed.

5. Water system of D.C.I. with reserve capacity and flow rates 1.5 times at least, the required design.

6. Having a network of D.C.I. in accordance with Table IV-1 facilities that are not required to do so.

7. Have means to pour, quickly and effectively, foam on the cubeto the facilities that are not required to do so.

A minimum application capacity of 11.4 m3/h, at least 30 minutes, will be available.

8. Provide sufficient numbers of hydrants so that each point in the risk zone is covered by two hydrants that are also conveniently located to act in an alternative manner in case of a disaster that may affect one of them.

9. Other equivalent effectiveness which may be proposed, in a reasoned and justified manner, in projects.

10. Automatic detectors fixed, with alarm, of explosive mixtures (directly or by means of the concentration) in the area surrounding the tanks.

Level 2. Fixed automatic-drive systems or fire-fighting brigade.

They can be:

1. Fixed systems of permanent inertization by means of inert gas in the interior of the containers.

2. The systems referred to in points 2 and 3 of level 1, but equipped with automatic detection and actuation.

3. Own and permanent fire brigade, dedicated exclusively to this function.

4. For sub-class B1 products: Floating roofing in the storage tank and fixed system of manual drive foam.

5. Installations that are not required, have a D.C.I. network with automatic pressurisation pump, exclusive supply for this purpose and for a minimum of 1 1/2 hours with a minimum flow rate of 60 m3/h and pressure according to paragraph 2 of the chapter IV.

6. Flame retardant with RF-60.

7. Double flow rate and double system for foam injection in the tanks resulting from calculations according to the ITC. It is not applicable for tanks that store class A liquids.

8. Double flow rate of foam to the cubeto of which it is calculated according to the ITC. It is not applicable to cubetos containing only class A products.

9. Double stock of foams from which it is calculated according to the ITC. It is not applicable when measures 7 or 8 of this same group have been adopted.

10. Other equivalent effectiveness which may be proposed, in a reasoned and justified manner, in projects.

The adoption of more than one level 1 measure or system, of a different nature, is equivalent to the adoption of a level 2 measure or system.

Only one, and only one time, can be applied between the reductions shown in Table II-6.

CHAPTER III

Civil work

INDEX

1. Foundations: considerations for your design.

2. Retention cubets.

3. Drainage networks.

4. Loading and unloading zones.

5. External limits of installations: fenced.

1. Foundations: considerations for your design.-The design of the foundations for containers and equipment included in storage areas must conform to the current regulations for this type of installation.

The diversity of conditions in the different soils, climates and environments makes the determination of the permissible load and settlement to be carried out in particular in each installation. In any case, the person concerned must specify the methodology used in the calculation of the foundations and in his absence the following specifications shall be considered appropriate:

1.1. Location and influence of soil characteristics. When the importance of storage is required, the following considerations shall be taken into account:

1.1.1. Before determining the exact location, a geotechnical survey of the terrain should be carried out in order to obtain the data necessary to determine the resistance of the terrain, foreseeable settlements with time and water level with the help of these Data can be chosen for the appropriate location, if there are no other conditions, and select the appropriate type of foundation, in line with the requirements of the type of containers and the facilities or structures attached to it.

1.1.2. The permissible settlement of the land must correspond to the maximum limit laid down in the design. They should be fixed, both differential and uniform. The conditions affecting the allowable settlement limits are:

-The type of tank: since, for example, floating-roof tanks will generally tolerate a much smaller differential settlement than the conical-roof tanks.

-The economic impacts, such as cost savings on the foundation, as opposed to higher risk of disaster or higher maintenance cost.

-The permissible relative settlement between foundations and adjacent or tank-related pipes.

-The uniformity of the subsoil, with respect to differential settlement.

The permissible uniform settlement may vary from a few millimeters to several centimeters. To admit, large settlements should be addressed to the opinion of experts in soil mechanics.

1.1.3. As far as possible, the construction of tank foundations under conditions such as those indicated below should be avoided, which, if unavoidable, should merit special consideration.

-The places where a part of the foundation can be on rock or natural terrain and another part on filling, or with variable depths of filling, or where a pre-consolidation of the land has been necessary.

-Panty places or with understandable material in the subsoil.

-Places of questionable soil stability, as a consequence of the proximity of water courses, deep excavations or large loads, or in steep slope.

-Places in which tanks are exposed to possible flooding that would cause their flotation, displacement or undermining.

1.1.4. If the subsoil on which the foundation is constructed is weak and inadequate to withstand the loads of the full tank, without excessive settlements, the following methods can be considered:

-Removing unsuccessful materials and replacing them with properly compacted padding.

-Compactation, by vibration or preload (navets), with terraplen material or others.

-Stabilization of soft materials by drainage.

-Stabilization of soft materials by injection of chemical agents.

-Construction of a reinforced concrete structure, supported by piles or in other appropriate form.

1.2. Typical tank foundations. The material used in a typical foundation to replace unsuitable soft materials should be homogeneous, preferably granular and stable free of organic or harmful materials. It is appropriate that the material forms a dense surface, with layers of 150 millimeters that are compacted with a 6 to 10 ton apisonator. At the top of the foundation the size of the material is reduced to facilitate the establishment of a suitable profile.

In the case of tanks with flat bottom the surface on which the bottom of the tank rests must be at least 30 centimeters above the ground. The foundation surface should have a minimum slope of 0,8 per 100 so that the centre is higher than the periphery. If the floors are soft, this minimum will be raised to 1.5 per 100 to compensate for the center's settlement. In the case of a tapered bottom tank or flat bottom, a correct seal must be secured between the bottom sheets and the foundation surface.

In addition, as a cote to add to the values initially indicated, it is advisable to consider the settlement so that at the end of the settlement the tank will not be buried. The purpose of this measure is to prevent the corrosion of the bottom sheets, which due to the settlements, could be left to the level of the surrounding terrain with the consequent chartering and oxidation.

Once the profile of the surface has been completed, for waterproofing the foundation and leaving a strong enough support to work on it and welding the bottom sheets, the surface is covered with a smooth layer of agglomerate 50 millimeters thick asphalt, made with sand. If the layer is made with 120 litres of non-toxic fluidized asphalt for each cubic meter of dry sand washed can be used as corrosion retardant.

This asphalt and sand agglomerate extends outside the periphery of the tank to protect the outer surface of the foundation and may be necessary to give some periodic retouching to preserve an adequate slope from the tank.

In the event that a cathodic protection system is adopted for the bottom of the tank, this layer of agglomerate can be omitted.

Whatever the type of construction chosen, the surface of the foundation immediately below the enclosure shall be rekilled in such a way that the difference in level does not exceed 6 millimeters in 10 metres, or 12 millimeters between any two points located on the periphery.

In the floating roof tanks an uneven foundation and differential settlement can result in an oval shape of the top of the enclosure, with the consequent gripping of the floating roof.

1.3. Modifications and variants in typical foundations.

1.3.1. As a variant of the surface lined by the sand agglomerate with asphalt, a firm with 75 mm stones of medium granulometry can be constructed, coating it with a layer of 100 millimeters with a gravilla base of 10 to 20 millimeters, or similar material but of sufficient size not to present capillarity phenomena.

1.3.2. When subsoil conditions impose the use of a reinforced concrete structure and piles, these are designed according to the corresponding criteria. An agglomerate of sand with asphalt of 10 millimeters of minimum thickness is extended on top of the structure.

1.3.3. In the column-supported roof tanks, the settlement must be taken into account, avoiding placing tanks of this type on non-suitable grounds, or providing the columns with some mechanism to allow for their easy recalculation.

1.3.4. When the tank is required to have a drain, in the background it is needed:

-On hard ground with small foreseeable settlement, give a slight slope to the center.

-On soft ground in which considerable settlement is provided, the foundation is constructed as indicated in 1.3.2, to ensure that the slope towards the sink is maintained.

1.3.5. In some tanks it may be necessary to prevent the lifting of the envelope as a result of the combined effects of the vapour pressure and the wind moment, by means of retaining bolts that fix the envelope to a ring or structure of the wind. concrete.

1.3.6. In very large or high-body tanks that impose considerable loads on the perimeter and when the soil does not provide sufficient guarantees to allow the typical foundation, it is convenient to have a concrete ring on which the floor rests. wrap so that its axis matches that of the ring. This flat, level top surface ring for mounting the enclosure retains the fill and acts as an anti-humidity barrier.

Its width shall be proportional to the height of the envelope but shall not be less than 300 millimetres so that the pressure on the ground under the ring and inside are the same in order to avoid differential displacements. The depth of the ring will depend on the local conditions, until it reaches a deeper ground than the modified one when the foundation. The level of the upper face shall not present a difference of more than 3 mm in a 10-meter arc of circumstantial length, nor shall it have any points which differ more than 6 millimetres from the intended limit.

The ring is rekilled with a bezel, approximately 25 by 25 millimeters. The ring steel armature will be able to absorb the tensile stress caused by the weight of the stored liquid and the thrust of the ground contained in the ring.

1.3.7. In the storage of cryogenic liquids, special precautions should be taken to avoid freezing, and subsequent variation of subsoil volume.

1.4. Hydraulic test influence. -When performing the first hydraulic test, special precautions should be taken in case the foundation fails. The first tank to be tested on a given site shall be specially controlled and the settlements shall be recorded on the basis of loads.

A procedure is to mark four symmetrical points on the periphery of the tanks (8 if the tank is more than 25 meters in diameter), which will be used as a level reference.

When the ground is suitable you can fill the tank up to the middle quickly; you will then check the levels and if no differential settlements have occurred, you can fill the tank up to three-quarters of the its capacity, then repeating the reading. If the tank remains level, the filling is finished, repeating the readings. The tank is left full for forty-eight hours and if the levels remain constant, the tank can be emptied, with the precaution of opening an air inlet sufficient to prevent the deformation of the same by vacuum. If similar tanks have been installed on similar ground in the tests of those, the stops can be omitted in half and three quarters of the filling.

Imagen: img/disp/1991/181/19404_001.png

In soft land, where settlements of more than 300 millimeters are expected, it is necessary to fill in slowly. The water will be added so that it rises every day 0.6 meters up to a height of 3 meters. The filling is then stopped, and recorded in successive days, the reference levels, which are recorded on a scale based on time, to establish the settlement curve.

When the daily settlement begins to decrease, water is added to the tank with increases of increasing heights.

When the water load is close to the tank capacity, the water is added at the time of the sunrise, in small quantity, in order to make readings during the day, and unloading the tank if any settlements are observed. (i) In soft soils these tests should be done over extensive periods of time in accordance with good practice.

Data on soil shear strength and strata thickness allow safe heights to be established for initial filling.

To perform this test procedure, a suitable system for filling and emptying must be available. The discharge should be avoided along with the foundation itself, so as not to lead to erosion and the softening of the surrounding terrain.

The water temperature and characteristics used for the hydraulic test will be compatible with the container and facilities material.

2. Holding cubets.-The surface containers for the storage of liquids must be housed inside a holding cup, except in the cases provided for in paragraph 2.2.2. 'Subclass A. 2'. A group of vessels within the same cubeto may contain only liquids of the same class or subclass for which they were projected or of a lower risk.

Containers containing products of Class A shall be provided separately or in separate cubets from which they are designed for Class B, C and D products. Containers containing products of these three classes may be include in the same cubeto, trying to group those that contain products of the same class.

In all the cubetos the containers must not be disposed in more than two rows: it is necessary that each row of containers has adjacent a street or path that allows the free intervention of the mobile means of struggle fire. These requirements are not necessary when, by the size of the vessels or the existence of fixed systems mounted on them, their supply and operation is ensured, in the event of fire, even in the case of tanks. inaccessible from the outside.

The horizontal projection distance between the container wall and the lower inner edge of the cubeto shall be at least 1,5 m (Figure III-1). For class D products this distance can be reduced by leaving a minimum useful width of 0.8 m.

These values shall be applicable even to those existing facilities referred to in Article 2 of the Ministerial Order that approves this Technical Instruction.

In the case of low pressure tanks the minimum horizontal distance "x" between the wet wall of the container and the inner edge of the cubeto coronation will be 0.6 times the vertical distance "and" between the maximum level of the liquid in the container and the crowning of the cubeto (Figure III-2). No values of x greater than 4 m for class B, 3 m for class C and 2 m for class D shall be required. In no case shall it be less than 1,5 m.

They may not be in the same cubeto containers with products that are incompatible with each other, and are incompatible with the building materials of other containers, both due to their chemical characteristics and their physical conditions.

When the container has a double wall, it will not be considered as a cubeto. The bottom of the cubeto shall have a slope so that all the spilled product will drain quickly to a zone of the cubeto as far as possible from the projection of the deposits, the pipes and the control organs of the fire network.

2.1. Capacity of the cubeto. -When a cubeto contains a single container its capacity is established considering that such a container does not exist, that is, it will be the volume of liquid that can be retained inside the cubeto including that of the container until the liquid level in the cubeto.

When a cubeto contains two or more containers, its capacity is set:

2.1.1. Referring to the larger container, considering that there is no such container, but if the others, that is, discounting the total volume of the empty cubeto the volume of the part of each container that would be submerged under the level of the liquid, except the major.

2.1.2. Referring to the overall capacity of the vessels: the total volume of the cubeto, considering that there is no container inside.

2.2. General rules.

2.2.1. Sub-class liquids A1.

In the same cubeto, no containers submitted and not submitted to the Presenter-to-Pressure regulation may be placed.

When a cubeto contains a single container its capacity will be equal to 100 per 100 of the capacity of the vessel.

When a cubeto contains multiple tanks or tanks, its capacity must be equal to the largest of the following values:

-100 per 100 of the calculated capacity according to 2.1.1.

-10 per 100 of the calculated capacity according to 2.1.2.

Each container must be separated from the next by an embankment or murete. This separation must be arranged in such a way that the capacities of the compartments are proportional to those of the contained containers.

2.2.2. A-2 subclass liquids.

When the storage temperature is lower than the ambient temperature, or a spill may flow into process units or open fires, the deposits must be disposed of in a cubeto. In other cases, the existence of cubeto is not mandatory.

In the case where there is a cubeto, the bottom of this must have a slope such that any spilled product will flow rapidly to a point as far as possible from the pipes and control elements of the network fires, and must have at least a capacity equal to 20 per 100 of the overall capacity of the deposits in the contents.

For deposits of more than 200 cubic metres the maximum height of the murettes of the cubetos shall be one metre and the minimum of 0,50 metres, if they are ground, and 0,30 metres, if they are factory work.

When storage tanks are located on high or outstanding land, which will support the output of the products, appropriate height murettes must be constructed to protect the low lying areas of such areas. or buildings, roads, roads, railway tracks or other public services.

2.2.3. Liquids of classes B, C or these together with D.

When a cubeto contains a single container its capacity will be equal to 100 per 100 of the capacity of the vessel.

When multiple containers are grouped into the same cubeto, the capacity of this is at least equal to the greater of the following two values:

-100 per 100 of the calculated capacity according to 2.1.1.

-10 per 100 of the calculated capacity according to 2.1.2.

To avoid the extent of small spills, cubetos containing several containers of stable liquids must be subdivided by drainage channels or, failing this, by internal levees of 0.15 meters high, Each subdivision shall contain no more than a single container of capacity equal to or greater than 2,000 cubic metres or a number of containers of a total capacity of not more than 3,000 cubic metres. When the stored liquids are unstable, the subdivision shall be for each container, except when protected by a fixed water spray system in which case this requirement is not necessary.

2.2.4. Class D liquids

The capacity of the cubeto is independent of that of the containers contained therein.

The walls of the cubetos will have a minimum height, measured from the inside of 0.5 meters.

2.3. When the land on which the cubetos are constructed is pending, the rules regarding the minimum heights of the walls or dikes are not applicable to the parts of the cubeto located on the highest side of the terrain.

When the slope requires to provide for the lower part of the levees whose height may constitute an obstacle in the event of an accident, the accesses shall be located on the side where the height of the levees is less.

The remaining general rules apply equally to the slopes with slope.

2.4. Cubetos separated from the containers. Containers associated with the same cubeto. If the provisions adopted allow the cubeto to comply with its mission of retention of products in case of accidental leakage without the tanks being inside the cubeto these tanks may be more or less distant, in a way to carry spills to an area that presents less risk, provided that they meet the following conditions:

2.4.1. The arrangement and the slope of the ground around the tank must be such that, in case of leakage, the products will only run towards the spillage collection cup.

2.4.2. The journey through accidental spillage between the containers and the holding cup must not pass through areas where there may be unprotected fires or cut off main paths of access to them.

2.4.3. For liquids of classes A, B and C, the minimum capacity of the cubeto must be equal to the greater of the following values:

-100 per 100 of the capacity of the larger canister.

-10 per 100 of the overall capacity of the canisters.

The rules regarding the execution of shares in cubetos are not mandatory for those who do not contain containers. The system for collecting leaks in the vicinity of the containers shall be such as to prevent accidental spillage from one of them affecting the vicinity of the other vessels.

Cows that do not contain containers are applicable to the general rules specific to this paragraph 2, except as regards the internal levees that are not necessary here.

2.5. Construction and disposal of cubetos.

2.5.1. The walls of the cubetos may be of earth, steel, concrete or factory work, designed to be sufficiently watertight and to resist the total height of the liquid to full cubeto.

The earth walls of one meter or more of height will have at its coronation a minimum width of 0.6 meters. The slope of a earth wall shall be matched with the angle of rest of the material with which it is constructed.

Cubets for vessels containing class B liquids on very porous grounds need special treatment of the soil (coating with clay, concrete, plastic sheets or other similar) to avoid losses. Important liquid by filtration in the case of container leaks.

In all cases, there must be normal and emergency access with a minimum of 2 and in number such that a distance of more than 50 m is not to be reached until access is reached from any point of the interior of the cubeto.

2.5.2. The walls of the cubeto must have a maximum height of 1.8 meters, with respect to the interior level, to achieve good ventilation. This height may be exceeded exceptionally and not recommended in the following cases:

2.5.2.1. Up to three meters when there are normal and emergency access to the container, valves and other accessories, as well as safe exit paths from the interior of the cubeto.

2.5.2.2. Optionally, heights greater than three metres may be considered when there are elements to reach the roof of the container and/or to actuate the valves and other accessories, allowing people not to have access to the interior of the cubeto for normal or emergency manoeuvres. These elements can be high passes, closed valves at a distance or similar.

2.5.3. The height of the murettes (referred to at the level of the paths of access to the outside) must not exceed three meters in the middle of the periphery of the cubeto. If the access paths are contiguous in less than half of the periphery of the cubeto, the above requirement shall relate to the entire portion of the cubeto adjacent to those tracks.

2.5.4. The cubetos must be surrounded, at least, in a quarter of their periphery by access, which must be at least 2.5 metres wide and free height of at least 3.5 metres.

2.5.5. The drainage of clean water, liquids and contaminated water shall be constructed in accordance with the provisions and characteristics referred to in paragraph 3 'Drillnets' of this Chapter.

The slope of the bottom of the cubeto from the tank to the drain sink shall be at least 1 per 100 until the sump or at least in a zone of 15 meters from the tank wall.

2.5.6. The permanent use of flexible hoses is prohibited inside the cubetos. Their use will be limited to short-term operations.

2.5.7. Pipes that are not buried must not pass through more than that of the container or containers to which they are connected.

The passage of the pipes through the walls of the cubetos must be done in such a way that their sealing and integrity is ensured by means of fire resistant devices. Efforts shall be taken into account for possible settlement of the land or for thermal effects in the event of fire.

2.6. Evacuation channels. -Evacuation channels shall have a minimum useful section of 400 square centimeters with a slope, also minimum, of 1 per 100 in the direction of the cubeto walls.

3. Drainage networks.-The drainage networks will be designed to provide adequate evacuation of the residual fluids, rainwater, process, fire services and other similar. The materials of the pipes and fittings shall be suitable to withstand the possible chemical attack of the products to be transported.

3.1. Essentially, there are two general collectors: one for clean water and one for contaminated water, or which may be contaminated, which must be cleaned before the discharge complies with the requirements specified in Chapter VII, "Treatment of effluents" of this ITC. Mixtures capable of reacting violently with each other or with water, polymerizing, solidifying, or other actions that may destroy or plug the drainage network may not be poured into the drainage network.

In cases where, because of the minor importance of the installation, there is no more than the clean water collector, the necessary measures will be taken to prevent them from flowing into the same dirty water. The area liable to be contaminated shall be contained in the cubeto, the drainage of which shall comply with the exception of 3.7 with the exception that, when the result of the analysis requires, the liquid shall be evacuated, even if the result of the analysis requires it to be the cleaning water, by pumping or gravity from the sinkhole to a container or tank, for further treatment. The rainwater, after testing, can be evacuated directly to the clean water collector.

3.2. The minimum size of the general collectors shall be 200 mm in diameter, or their equivalent in non-circular section. The ramals shall be 150 mm in diameter and, exceptionally, for very short sections, of 100 millimeters in diameter.

The minimum burial depth, without mechanical protection, to which the drainage pipes must be located must be 600 millimeters measured from the top generator of the pipe to the level of the ground. At crossings in the streets, or areas where heavy vehicles are circulating, drainage pipes shall be placed at greater depth, or adequately protected to prevent possible breakage. The protection of these pipes may be carried out by sleeves.

3.3. The inlet of liquids to the contaminated water collector shall be carried out by an archet and through a symphonic closure, so as not to escape gases from the general collector by such a graft. This symphonic closure must be constructed so that, if necessary, the pipe and the closure itself can be cleaned.

3.4. Both the general collectors and the rest of the drains must be constructed in such a way that no leaks are made to the soil, and their layout should allow for easy cleaning of deposits and sediments.

3.5. The network must be accessible for cleaning by means of archets, spaced at maximum 100 meters, to allow the cleaning of the lines. In all the changes of direction of 45 degrees, or greater, existing in general collectors will be arranged archets or other devices for cleaning and also in all the points of connection of the most important branches with the collectors main drain.

3.6. Throughout the general and branch collectors, as well as at all their intersections, symphonic closures or other effective firewall systems shall be established, separated at maximum 100 metres from each other.

3.7. In the case of clean water, liquids and contaminated water shall be collected in a sinkhole situated inside and at the lowest point of the cubeto. The sinkhole shall have a solid collection grating if it is possible for the sinkhole to be collected. This sinkhole, which at the same time can be used for sampling, is drained by means of a 200 mm minimum diameter pipe, with a symphonic closure, in accordance with paragraph 3.3 (100 millimetres if the containers are less than 50 cubic metres), which passes through the wall of the cubeto and which is equipped with a sectioning device (valve or any other similar) normally closed.

According to the result of the analysis of the liquid collected in the sump, the device is acted upon, which must be able to evacuate the collector of clean water or the contaminated water. The evacuation of contaminated water from the sinkhole can also be done through mobile means.

4. Loading and unloading zones. -The platform on which the vehicles are parked during loading/unloading shall have a slope of 1 per 100 towards the evacuation sinks, so that any accidental spillage flows rapidly towards them. The sink shall be connected to the contaminated water network or to a collection vessel or raft.

The slope and configuration of the platform will be such that if a pulverized water installation exists, it is collected in the aforementioned sinks, passing to a conduction with diameter and slope suitable for such flow, thus as with the symphonic closure referred to in paragraph 3.3.

5. External limits of the installations: fenced.-The entire surface storage plant must have an external enclosure surrounding the assembly of its facilities. The minimum height shall be:

-2 meters for global storage of up to 2,000 cubic meters.

-2.50 meters for global storage above 2,000 cubic meters.

This enclosure should not hinder aeration and will preferably be made with metallic mesh. However, it may be a solid wall in certain cases, particularly in the proximity of areas classified as Class I. Division 1 in the UNE 20.322 standard that limit public communication routes, inhabited or dangerous areas. The enclosure must be constructed in such a way that it does not hinder intervention and evacuation in case of need, by strategically located access.

If the fenced is a solid bite, it will take into account the output of stormwater that could be stored in its low points, and if this outlet is to the outside, it will have a hydraulic closing siphon that, allowing the exit of the water, prevent the exhaust of gases heavier than air which, eventually, could reach such an outlet.

The doors opening on external tracks must have a sufficient width or a suitable turning area so that the entry and exit of vehicles does not require manoeuvre.

CHAPTER IV

Fire protection in fixed surface installations

INDEX

1. Generalities.

2. Water protection.

3. Foam protection for products of subclass B1.

4. Protection by means of detection and extinction by halogenated hydrocarbons.

5. Inert atmospheres.

6. Special protections.

7. Extinguishers.

8. Alarms.

9. Auxiliary equipment.

10. Flame retardant.

1. Generalities. -Fire protection in a storage of flammable liquids and/or fuels and their related facilities is determined by the type of liquid, the form of storage, their situation, and/or the distance to other storage; therefore, in each case the system and the extinguishing agent that is most appropriate must be selected, provided that it complies with the minimum requirements that are generally laid down in this Chapter.

Fire protection installations shall comply with the specifications for standards relating to materials, components and apparatus thereof, in accordance with the regulations or rules in force, or in their absence or as a complement to these, in accordance with the UNE rules. Other standards of recognised prestige may also be applied provided they are accepted by the Ministry of Industry and Energy.

When the properties of the stored liquid or other specific circumstances make any of the protection systems set out in this chapter inappropriate, this aspect should be justified and appropriate protection should be installed. that is equivalent or more rigorous.

Fixed surface buffers located inside open buildings, whose volume open surface ratio is greater than 1/15, will be subject to the same protection requirements as the storage surface fixed on the outside.

The liquid storage of classes A, B and C located inside closed buildings must be protected by fixed systems of water, foam, dust or other effective agent. These systems may be manual whenever they exist during the 24 hours of the day, trained personnel in their operation.

Protection systems shall be maintained under operating conditions at all times, by means of inspections, tests, repairs and/or appropriate repositions.

The boiling (boil-over) overflow should be taken into account when designing the water protection of the tanks. This boiling or boil-over overflow is a sudden overflow or ejection of a portion of the residual crude that contains the reservoir, the cause of which is the boiling of water that forms a rapidly expanding oil and steam foam.

2. Water protection.

2.1. They do not need a network of fire water surface storage when their overall capacity does not exceed: 20 cubic metres for Class A products, 50 cubic metres for sub-class B1 products, 100 cubic metres for the products of subclass B2. 500 cubic meters for class C products and without limit for the products of class D.

2.2. A network of fire water shall be available for surface storage not covered by the previous paragraph and with global capacities which do not exceed: 60 cubic metres for Class A products, 100 cubic metres for the sub-class B1 products, 200 cubic meters for the products of the subclass B2 and 1,000 cubic meters for the products of class C.

The water network, in this case, must have multiple fire shots to ensure immediately and continuously the water flow required in table IV-1 for at least one hour.

The fire water network in this case may be common with that of industrial or drinking water if the required flow, pressure and autonomy can be ensured at all times.

The dynamic pressure of the water at the tip of the spear shall be at least 343 kPa (3.5 kilograms/square centimeter) when the required maximum flow is circulating, if the projection is made with hoses or spears.

The dynamic water pressure will be at least 98 kPa (1 kg/centimeter square) in the most inauspicious nozzle hydraulically and in operation, if the projection is made with tank-oriented spray nozzles. and in any case the necessary to obtain a spray and adequate cover, depending on the type of nozzle used.

2.3. Surface stores with global capacities higher than those in paragraph 2.2 shall have a fire network with a supply and an exclusive connection for this purpose.

The pipe diameters shall be calculated in such a way as to ensure the required flow rates with a minimum manometric pressure at any point in the network of:

685 kPa (7 kg/cm2).

The network will preferably be ring-shaped and will have enough cut valves to isolate any section that is affected by a break, keeping the rest of the network at work pressure.

The pipelines of the specific fire water network will, wherever possible, follow the road layout. The pipes must be protected against any type of mechanical damage, as well as frost and corrosion. They should preferably be buried.

Water supplies for the specific fire network may come from:

-Natural inexhaustible sources (river, lake, sea) or artificial (canal, reservoir, well), provided that they are able to guarantee, at any time of the year, the flow and time of autonomy required and equipped with the corresponding pumping equipment.

-Pressure deposits or high storage.

-Repositories for power from a pumping equipment.

A sufficient volume of water shall be available for the maximum flow rates required for the complete protection of the area affected by the fire and its surroundings for a minimum period of:

-An hour and a half for storage capacities of less than 200 cubic metres for Class A liquids, 500 cubic metres for Class B liquids and 2,000 cubic metres for C-class liquids.

-Three hours for capabilities higher than the previous section.

When one of the sources of supply is public, the necessary precautions must be taken to avoid possible contamination (e.g. by installing a check valve).

The installation will be equipped with a pumping system capable of driving the flow resulting from the application of table IV-1, to the storage area of greater demand, more the one required by the rest of the systems of protection of the zone They need to use water simultaneously. For surface storage with a capacity exceeding 200 cubic metres for liquids of Class A, 500 cubic metres for Class B liquids or 2,000 cubic metres for Class C liquids, the minimum flow rate shall be 100 metres. cubic/hour.

TABLE IV-I

Assessment of the water flow required in case of fire depending on the type of vessel burned

Class of Burnt Container Liquid Class


to cool

Minimum water flow to be predicted (note 3)

cooling

startups with Class A

Other containers or

1. Class A Liquid: Unit or global capacity up to 200 m3

The suspected arsonist and those located less than 10 m from the walls of that one.

0.15 m3/h (3 l/min) per m2 surface of the canisters (note 2).

Classes B and C, according to point 2. of this table.

Is required only for possible foam systems intended to protect adjacent installations.

Capacity unit or global greater than 200 m3

a) The suspected arsonist and those located less than 30 m from the walls of that one.

0.18 m3/h (3 l/min) per m2 of the surface of the containers (note 2)

b) The remaining containers contained in the same cubeto

0.06 m3/h (1 l/min) per m2 of containers (note 2)

a) The suspected arsonist

0.90 m3/h (15 l/min) per meter Perimeter

Maximum flow required to produce foam in the alleged fire tank and/or its cubeto

2. and C

b) Those located less than 15 m from the walls of the case fire or 1.5 times its radius.

0.18 m3/h (3 l/min) per m2 of the containers (note 2).

Caudals per m2 of 1/4 of the surface of the containers (note 2).
Fixed roof:
Class B1: 0.30 m3/h (5 l/min).
Class B2 and C:
0.12 m3/h (2 l/min).
Floating roof:
≤ = 7,500 m3 0.18 m3/h (3 l/min).
> 7,500 m3 0.12 m3/h (2 l/min) (nota3)

Notes:

1. For the cooling of the containers close to the fire that have a thermal insulation with a minimum conductance of 83.64 MJ/h m3 ° K (20 Kcal/h m3 ° C) and fire resistant and water jet will be used half of the water flow rate set in the table.

2. It is considered as total surface to refrigerate. The total surface area for cylindrical horizontal and spherical-axis vessels and the side surface for the remaining vessels.

3. The necessary flow shall be added for the protection of adjacent installations where appropriate.

When the fire network pressure is to be achieved by pumping it will be achieved by one of the following ways:

-2 pumps with 100 per 100 unit flow each connected to one energy source other than the other.

-2 pumps with 50 per 100 unit flow each connected to two different energy sources.

-Any other alternative that combines two or more energy sources, such as three pumps with 50 per 100 flow rate, one with electric motor and two with diesel engine.

When the required flow rate does not exceed 150 m3/h the pressure can be achieved by means of pumping, if there are two different sources of energy to actuate it.

The pumping equipment shall have means to allow the maintenance of the required pressure in the network automatically by lowering the pressure therein as a result of the opening of a fire hydrant or any other other consumption requested from the network.

When the water supply and pumping medium assembly feeds more than one specific protection facility, it must be able to simultaneously ensure the flow rates and pressures of each system that can operate. at the same time in case of fire and the time of autonomy of which it requires the greatest.

It is not necessary, in general, to contemplate the coincidence of more than one fire with independent location.

2.4. Water projection. The water may be projected by fixed spray installations, monitors, mobile equipment, hand-spears or canyons, or by a combination of the aforementioned means.

The fire water network hydrants shall be fitted with connection fittings conforming to standard UNE 23,400 and shall be duly distributed throughout the plant, in particular in the vicinity of the various areas of treatment, treatment and storage. In order to be able to consider a zone or risk protected by hydrants the distance of a point any of its limit at the level of the scraper and the nearest hydrant must be less than 40 metres.

Cabinets and cabinets containing hoses must be placed in accessible points and shall be of the appropriate size to be able to contain all equipment, so that other elements of the installation are not interfered with. The "fire equipment" sign shall be used exclusively for fire equipment and shall be clearly visible.

3. Foam protection for products of sub-class B1. -Subclass B1 liquid storage tanks of a unit capacity of 200 cubic metres or more shall be equipped with foam protection. Cubets containing containers that store liquids of sub-class B1 of global capacity equal to or greater than 200 m3 shall be equipped with fire protection with spillage foam in cubets.

In the event that either by enforcement, or by means of measures allowing for reductions in distance, a foam protection system is installed, the foam protection system must meet the following characteristics:

3.1. Required water-foaming flow. For fixed-roof tanks, a minimum flow rate of 4 litres per minute per square metre of surface shall be provided.

For floating roof tanks:

A. If the discharge mouths are above the upper closure.

-The maximum distance between two discharge mouths shall be 12 meters, measured on the circumference of the tank, if a 30-centimeter-high and 24-meter foam screen is used if the display is 60 centimeters.

-The flow of application and supply of foams should be calculated using the circular crown area between the foam screen and the cylindrical tank body.

The minimum foaming flow rate should be 6.5 liters/minut/square meter.

B. If the discharge mouths are below the closure.

-The flow of application and supply of foams should be calculated using the circular crown area between the cylindrical body of the tank and the edge of the floating roof.

The minimum foaming flow must be 20 liters/minut/square meter:

-If the closing is used the distance between two mouths must not exceed eighteen meters.

-If the pantograph closure is used, the distance between two mouths must not exceed forty meters.

3.2. Minimum application times.

3.2.1. For fixed roof tanks the minimum application time will be:

B1 products

55 minutes

B2 products and C

30 minutes

D products

25 minutes

3.2.2. For floating roof tanks with discharge mouths above the closure the minimum discharge time shall be 20 minutes.

3.2.3. For floating roof tanks with discharge mouths below the closure, the minimum application time shall be 10 minutes.

3.3. Protection from spillage fires in cubetos.

For the protection of spillage fires in cubetos shall be counted with foam generators of a minimum unit flow of 11,4 m3/h (190 litres/minute). To cover this requirement, at least the following minimum number of generators and minimum application time must be available:

Dieter in m of major
of the tanks

No. of required generators

Minimum time application (*)

< 20

1

20

≥ 20 < 36

2

30

≥ 36

3

30

(*) The minimum application time is based on the simultaneous operation of the number of generators required considering a unit flow of 114 m3/h.

When generators are of greater capacity, corresponding adjustments can be made at minimum application times, keeping constant the total amount of water-foam to be poured.

There will be a quantity of foams sufficient to protect the largest surface tank and its cubeto, in each of the independent zones in which the storage is divided, with the flow rates and times of application. have indicated in the preceding paragraphs. In addition, a reservation shall be made available within the maximum period of 24 hours for the replacement for the operation of the system at full load.

Foam protection, for the purposes of this paragraph, may be replaced by another extinguishing agent which, in the times specified above, results in equivalent efficacy protection, which must be justified in the project referred to in Chapter I (7) of this ITC.

4. Protection by means of detection and extinction by halogenated hydrocarbons.

Floating-roof tanks can be protected by an automatic system for detecting and extinguishing fires by halogenated hydrocarbons. This device must be equipped with at least the following:

-Shooting Senalization.

-Automatic-shot diffuser nozzles distributed along the roof-wall of the tank, taradas at 93 °C and located no more than 2 m from each other.

-It shall be justified that the halogenated hydrocarbon capacity is sufficient to cover the demand for all nozzles operating simultaneously in such a way as to ensure the extinction of a fire in the protected zone.

This system may replace protection with tank foam but not with the cubeto.

5. Inert atmospheres.-In the case of a surface storage for liquids of sub-class B1, in fixed-roof tanks, the risk of fire is reduced by means of protection with inert gas. This protection, if adopted, should be maintained on a permanent basis.

When this system is adopted, the requirement of paragraph 3, on foam protection inside the container, is not necessary, but it is necessary for the protection of the cubeto.

The minimum conditions to be met by inert atmosphere facilities are as follows:

5.1. Inert atmosphere types depending on the stored product:

It should be verified that there is no incompatibility between the stored product and the type of inert gas used.

5.2. System for creating inert atmospheres.

Any of the following three systems can be taken:

5.2.1. Suction and ventilation of the tank or storage tank through a gas meter, working in closed circuit. The connection to the latter shall be carried out on the "pressure-vacuum" valve with the incorporation of cortallamas. In this case, the gas meter shall be designed according to the needs of the container, in terms of demand for flow, maximum volume and pressure.

The content of the gas meter will be periodically renewed, depending on the nature and quantity of the gases stored.

When the contents of the various storage vessels are of incompatible liquids, a gas meter shall be used for each product.

5.2.2. Suction of inert gas from a suitable storage centre and expulsion to the atmosphere without recovery.

The inert gas input pipe will be connected to the roof of the storage canister.

The system shall be equipped with the necessary control and regulatory elements to ensure permanent operation, as well as an alarm warning of its failure.

5.2.3. Inert gas aspiration of a storage centre similar to that of paragraph 5.2.2 with recovery of ejected gas.

In this case, the admission shall be carried out under the same conditions as in paragraph 5.2.2. Including the automatism systems that will regulate the demand, with the recovery of the expelled gas through a connection located on the roof of the tank.

The gas recovery system shall be regulated by the use of a maximum and minimum presostat, which shall act when the pressure is lower than that of the intended safety valve and above the input pressure of the inert gas.

5.3. The supply of inert gas and the gas contained in the storage vessel shall be periodically analysed to check the content of the oxygen and/or components that may be hazardous.

You must also analyze and purge, if necessary, each time the alarm detects that you have been able to enter air from the outside.

6. Special protection. -For the protection of certain specific risks or the associated facilities of the storage, other fire protection systems and fire extinguishing agents such as: dust, CO2 and Halogenated hydrocarbons among others.

7. Extinguishers. -In all areas of storage and in particular the handling of flammable liquids where hoses, pumps, frequent or similar valves may exist and in the access to the cubetos, the fire extinguishers will be available. the appropriate type of risk and a minimum efficacy of 144B according to UNE 23.110. They will usually be dust, portable or on wheels. In the areas of electrical risk, either CO2 or halogenated hydrocarbon extinguishers shall be used.

Extinguishers will be reviewed periodically, in accordance with current legislation and manufacturer's recommendations, and at least once a year. A record book of the tests will be maintained.

8. Alarms.-Surface storage with a global capacity of more than: 20 cubic metres for Class A liquids, 50 cubic metres for Class B2 liquids, 500 cubic metres for Class C liquids shall have positions for the class. Alarm actuation which is less than 200 metres from storage tanks, pumps or charging and unloading stations.

The alarm-drive positions may be replaced by portable transmitters held by watchdogs or service personnel.

An audible alarm will be set, perfectly audible throughout the area and distinct from those intended for other uses (the notice of beginning and end of the working day, for example).

Rules will be set to prevent access blocking when the alarm sounds.

In the enclosure there must be a telephone for communications with the external relief services.

9. Auxiliary equipment.-Surface storage with a global capacity exceeding: 20 cubic metres for Class A liquids, 50 cubic metres for Class B1 liquids, 100 cubic metres for Class B2 liquids and 500 cubic metres For liquids of Class C, they shall have the following auxiliary equipment:

(a) In the vicinity of jobs, such as loading and unloading stations, filling and handling of drums and the like, the following personal protective equipment shall be placed:

-A filter mask for each operator of the position (optional).

-An autonomous (optional) respiration card.

-A fire-retardant blanket.

-A water station for shower and washing.

b) In places accessible for use at all times:

-An explosive mixing analyzer for Class A and B1 liquids.

-Sixty meters of hose, with joints adaptable to the fire network, with nozzles for jet and spray.

10. Flame retardant. -In places where it is reasonable to assume a probable fire, the metal supports or critical supports must have at least one resistance to the fire RF-90. This resistance can be achieved by coating, concrete or other fire resistant material or with a fixed system of water protection.

Critical support or support is understood to be the one that, in the event of failure, can cause serious harm or risk. For example, high inflammable deposit supports, building columns of more than one floor.

The flame retardant will be made with material resistant to the mechanical action of the jets of the water hoses against fire, to the meteorological agents and to the corrosive substances that exist in the environment of the area in question.

The application of the fire protection will be performed according to the good practice of the materials used in each case.

CHAPTER V

Installations for loading and unloading

INDEX

1. Classification.

2. Buildings.

3. Cargo.

1. Classification. -It is considered loading stations and unloading those places where the following operations are carried out:

a) Transfer between transport units and storage units or vice versa.

b) Transfer between fixed storage facilities and mobile containers.

2. Buildings.

2.1. Heating. -Local heating means where Class A liquids and sub-class B1 are handled shall not constitute or cause a possible ignition focus. Premises where there are heating devices that may cause an ignition focus shall be placed and arranged in such a way as to eliminate the entry of flammable vapours to them.

2.2. Ventilation. -An adequate ventilation system shall be provided in those premises where class A and class B1 liquids are transferred or pumped. The density of the vapours shall be taken into account in the design of the ventilation. Such ventilation may consist of suitable openings, practised on the outer and ground-level walls, not obstructed (except for lattice or thick meshes). When natural ventilation is not appropriate, forced ventilation shall be provided.

The adequacy of the ventilation system should be established to avoid the formation of flammable, toxic and/or dangerous atmospheres. When forced ventilation the blades of the fans will be constructed with materials that do not produce sparks in case of a chance to a chance with a metallic piece. If straps are used for the actuation of the fans, they will necessarily be of the antistatic type.

The handling of flammable liquids is prohibited in those premises where there are pits or basements where the vapors may accumulate, unless adequate ventilation is available to prevent such accumulation.

3. Cargo.

3.1. Land-based cargo.

-Ground loading facilities for tank trucks must adapt their design and operating criteria to the requirements of the regulations on the transport, loading and unloading of dangerous goods.

-A loader may have several loading or unloading positions from tank trucks or rail tankers.

Your disposal will be such that any accidental spillage quickly flows into a sinkhole, located outside the vertical projection of the vehicle, which will connect to the contaminated water network or to a container or raft of water. collected, without affecting other loading posts or other installations. It should be avoided that spilled products can reach public sewerage networks.

The above paragraph does not apply to the Class A1, A2 and D. Product Loaders.

-Truck loads will be placed in such a way that the trucks that are directed to them or that they come from can do so by means of free movement.

The loading and unloading of tankers must be carried out with the truck engine stopped.

The tanker trucks will be placed in the load so that they can make their way out without any need for manoeuvre. The accesses will be wide and well signposted.

The standby means of transport must be positioned in such a way that they do not hinder the departure of those who are loading or unloading, nor the circulation of the means for fighting fires.

-The routes of the tanker wagons must not be used for general rail traffic, nor shall they have any traction power installed. The tracks will be unpending to the loading and unloading zone.

The movement of the tank wagons shall be made by diesel locomotives provided with firewalls in the exhaust of hot gases or by means of winches. The passage through the steam locomotive load lanes shall be prohibited.

The wagons that are being loaded or unloaded will be stopped by chocks, wedges or similar systems.

The installation shall have adequate means and procedures to prevent other wagons or locomotives from running into the tank wagons that are in operation on the load.

-The structure of the loading position, the pipes and the diver tube if the load is made up must be electrically interconnected to each other and to a grounding by a permanent conductor. If the load is of tank wagons, in addition all this will be electrically connected to the rails of the railway track. If there are several earth sockets, they will all be interconnected, forming a network.

Next to each loading or unloading position there will be a flexible driver permanently connected by one end to the aforementioned grounding network and by another to a connecting piece of sufficient length to connect the mass of the The tank or wagon of the corresponding truck or car during loading and unloading operations, establishing an indication with alarm or interlock which ensures the correct contact of the part of the vehicle connection.

To avoid the effect of the parasitic currents, special provisions such as the placement of insulating joints between the railing rails and those of the general network will be taken.

-The filling may be done by the lower part of the tanks or by the dome. If the filling is made by the dome, the loading arm must be fitted with a diver tube which may be made of steel or non-ferric material, the end of which shall be of soft metal which does not produce sparks in the steel of the tank. In any case, the limb of the tube shall be conductive and electrically connected to the fixed load pipe.

The tube must be sufficient in length to reach the bottom of the tank and shall be constructed in such a way as to limit its possibility of elevation in the course of the filling operation.

The nozzle must have a shape that avoids splashing.

The above three paragraphs do not apply to products of classes A1, A2 and D.

The diver tube shall not be required for products of Class B1, with a flash point of less than 21 ° C and a vapour pressure of more than 31 kPa, if the load is carried out with hermetic coupling of the load arm to the mouth of the tank and with an input speed of the product not exceeding 1 m/s in the first moments.

In the case of extensions and the minimum distances cannot be met in accordance with Chapter II after all reduction measures are applied, the distance from the load to the unit of the load may be reduced. process up to a minimum of 5 m if an RF-180 firebreak is interposed between the two metres, of a minimum height of 6 m and of a length not less than the result of the sum of the length of the tank-vehicles plus four metres, in addition to all the requirements of this Regulation.

3.2. Sea cargo.

The connection between the ship's valves and the flammable liquid transport pipes shall be established by means of hoses or articulated pipes.

-The hoses may be supported by structures or masts, or simply supported on the ground or raised by the ship's own means. On the ground end they will be connected to the flammable liquid pipes.

Articulated pipes or arms shall be supported by a metallic structure and the joints shall be watertight.

If the movement of the articulated pipes or arms is automatic or semi-automatic, the operating controls to bring or remove the ends thereof to the valves of the vessel shall be located in an appropriate place for monitor the entire connection operation.

The connections between ship and hoses or articulated pipes or arms must be free of movement in order to be able to follow the ship in its normal displacements during loading or unloading, without offering more resistance that the premises itself.

The installation shall have a system for, after completion of the loading/unloading operation, emptying the pipes and hoses of products that they may contain, and of suitable means to collect them, in number and capacity sufficient.

Terminal load pipes must be electrically continuous and grounded.

The ship and the load/discharge station must not present electrical continuity through the pipes, being able to achieve this by means of an insulating flange placed as close as possible to the end of the connection, or by a Hose with electrical discontinuity, which must be correctly identified.

-The loading and unloading facilities of tank-tanks or barges shall be mounted so that at any time the amount of flammable liquids can be stopped in the operating conditions, for which a appropriate permanent communication with the place and persons controlling the operation.

The necessary forecasts will be made so that an eventual abrupt valve closure cannot cause the rupture of pipes, hoses, or joints.

Flexible hoses used in the loading and unloading of flammable liquids from tank vessels and barges shall be regularly inspected by personnel of the facility for verification of their condition and, At least each year, they shall be subjected to a pressure and deformation test to ensure that their original characteristics are maintained.

The joints of the articulated pipes shall be kept in a correct state of operation so that they maintain their tightness at the working pressure and lower and do not suffer from gripping which may cause the arm to break during the movements of the vessel.

When the station is accessible to traffic, it will be ordered to allow free access to mobile equipment for firefighting.

In loading/unloading facilities, no hot works will be performed during these operations, except with special authorization from the Head of the plant.

CHAPTER VI

Electrical installation

INDEX

1. Generalities.

2. Lighting.

3. Electrical installations, materials and equipment.

4. Temporary or temporary facilities.

5. Grounding.

6. Electrical power supply.

1. Generalities. The electrical installation shall be carried out in accordance with the provisions of the Low Tension Electrotechnical Regulation.

For zone classification in the areas object of this ITC you will follow what is specified in the UNE 20.322 standard.

2. Lighting.

2.1. The general lighting of the facilities will meet the requirements of the General Ordinance on Safety and Hygiene at Work.

The lighting system shall be designed to provide a reasonably uniform distribution and level of illumination.

2.2. The characteristics of the lighting equipment to be installed shall be adapted to the requirements of paragraph 3 of this Chapter.

3. Electrical installations, materials and equipment.

3.1. All electrical installations, equipment and materials shall comply with the requirements of the high and low voltage electrical regulations affecting them.

3.2. Protection against the effects of static electricity and currents that may occur for any abnormality shall be established by the grounding of all metal masses.

4. Temporary or temporary facilities.-The use of temporary electrical equipment should be minimised.

When the interim installation has met its target, it must be disconnected and dismantled.

Provisional electrical equipment and the cable system must be selected, installed and maintained for its purpose and environmental and safety conditions.

5. Grounding.-The ground is intended to limit the tension that, with respect to the earth, can present at a moment the metallic masses, to ensure the action of the protection and to reduce the risk that it is a fault in the material used.

6. Electrical power supply.

6.1. The supply of electric power in high voltage will be done according to the Regulation of Electrical Lines of High Tension and with the Regulation on Technical Conditions and guarantees of safety in Electrical Central, Substations and Centers of Transformation.

6.2. The low voltage electrical distribution networks shall be in accordance with the Low Tension Electrotechnical Regulation.

CHAPTER VII

Effluent treatment

INDEX

1. Purification of liquid effluents.

2. Sludge and solid waste.

3. Emission of pollutants into the atmosphere.

1. Purification of liquid effluents. -All liquid effluents that may present some degree of contamination must be treated in such a way that the final discharge of the plant complies with the legislation in force in the field of discharges.

2. Sludge and solid waste.-Solid sludge and solid waste must be disposed of by a suitable procedure which does not result in contamination of surface water or groundwater by infiltrations or runoff, or produce air pollution above the permitted levels in the legislation in force.

3. Emission of pollutants into the atmosphere.-The concentration of pollutants within the storage enclosure must comply with the General Ordinance on Safety and Hygiene at Work.

On the outside of that storage enclosure the levels of immission and emission of pollutants into the atmosphere will comply with the provisions of the legislation in force in this area.

CHAPTER VIII

Specific features for class A product storage

INDEX

1. Generalities.

2. Storage of liquids from the A1 subclass.

3. Storage of liquids from the A2 subclass.

4. Vaporizers.

1. Generalities. -The provisions of this Chapter apply specifically to the liquids of Class A, having the character of additional requirements or modifications to those established in previous chapters.

2. Storage of liquids from the A1 subclass.

2.1. Design and construction.

2.1.1. In general, the provisions laid down in Chapter I (2) "Storage in fixed containers" shall be taken into account in particular:

-Design temperature.

-Low-temperature service materials.

-Types, procedure, and welding tests.

-Cold putting procedure.

When specific and proven technology is justified, containers of special materials and designs (such as concrete or double wall) may be used, with the requirements of such technology being met.

2.1.2. The design and construction of the supports, foundations and anchorages shall also take into account the temperature at which they are to be subjected to the selection of materials and the effects of possible efforts caused by ice formation, Soil freezes and other analogues.

2.1.3. Different connections to the vents.

In both the liquid and steam areas, the connections will carry an internal or external valve located closest to the container wall. The unused connections, which must be closed with blind flange, plug, valve or combinations of these elements, are excepted.

When containers do not pressure the connections of a diameter of more than 25 millimetres (except those of drainage) for which liquid may come out, in addition to the valve of the previous paragraph, they shall be equipped with at least one of the following devices:

-Valve that automatically closes in case of fire.

-Valve with remote control that remains closed, except during the operating period.

-A check valve on fill connections.

In the pressure tanks the connections shall also carry an emergency locking valve as specified in paragraph 3.1.2.2 of this Chapter.

When drainage connections are installed, two valves will be available; the nearest one to the tank, 50 millimeters in diameter, maximum, and the type of quick close, and the second, flow regulation, not greater than 25 millimeters of diameter.

In the choice of the type and position of the valves, the formation of ice will be considered to prevent the valve from making the valves or control mechanisms inoperable.

2.1.4. The liquid level in the container will be such that it will never exceed the maximum design. If there is a risk of overfilling, a high level alarm shall be provided to enable the operator to interrupt the filling. In default, an automatic equipment may be arranged to interrupt the filling when the maximum level is reached.

When the excess filling can cause damage to the container or installation, by failure of the systems mentioned in the previous paragraph, an emergency system may be available to pour excess liquid into the cubeto or to the safe place.

The maximum level of filling should be justified in the Project Memory taking into account the properties of the liquid (such as dilation, among others) and the operating characteristics (temperature, among others).

2.1.5. The thermal insulation of the container shall be watertight, either by its cellular structure or by the use of a suitable barrier and resistant to the impact of the water jet.

2.2. Identification plate. Each container must be permanently, visibly and accessible, a plaque containing at least the following:

-Identification of the canister.

-Design code.

-The name of the manufacturer, or its legal representative or importer.

-Build date.

-Nominal volume in cubic meters.

-Maximum design level in meters.

-Maximum allowable water level in meters.

-Maximum design pressure in kPa.

-Minimum design temperature in degrees Celsius.

2.3. Cooling system.-To maintain pressure in all containers, without overloading the working pressure, equipment for cooling or extraction of vapours with sufficient capacity to condense or to collect the produced vapours shall be available. in the most unfavourable weather conditions of design. The effect of sudden changes in atmospheric pressure must be taken into account in atmospheric tanks.

If the container does not have a return line of vapours, the previous capacity must be increased in that corresponding to the condensation of the vapors in the filling.

There shall be a reserve equipment for cooling or extraction of vapours, the capacity of which is at least equal to that of the equipment greater than those installed for these purposes, unless the vent of the vapours is to a torch or to a safe place. Auxiliary means shall be provided for operating the critical equipment in the event of failure of the normal means.

2.4. The normal and emergency sales of all vessels shall comply with the provisions of Chapter I (3), "Storage in fixed containers".

The effect of the off-duty or maximum-power cooling system shall be included in the normal window, and in atmospheric tanks the effect of the maximum variation of barometric pressure according to the meteorological records local.

The venting devices shall be specified and installed in such a way as to prevent the formation of ice on them.

The vent connections over the canister will be in your steam zone.

2.5. Pipe systems. -As set out in Chapter I, paragraph 4, "Storage in fixed containers".

Measures will be taken to allow expansion, contraction and settlements and to reduce vibrations, thermal shocks and other similar efforts, when these conditions can occur. The pipes may be installed buried, air or both, but in any case they will be well supported and protected against physical damage and corrosion. Where applicable, the effects of seismic source efforts on the design of pipelines shall be considered.

Valve materials, seats, and gaskets will be resistant to liquid or vapor action in each case.

The hoses used shall be suitable for the liquid to be handled and must be designed to withstand the maximum service temperature and a minimum break pressure of at least four times the maximum working pressure.

The design, materials and construction of the loading arms must be tested at a double pressure of the maximum operation.

2.6. Tests. -Piping vessels and systems shall be tested in accordance with Chapter I (7), "Storage in fixed containers", and the design code.

2.7. Disposition.

2.7.1. Fixed surface containers shall be installed outside the buildings and within the cubets according to Chapter III, "Civil work". Installation of overlapping containers is not allowed.

2.7.2. Irrespective of the distances set out in Chapter II, "Distances between installations and between containers", the separation between the wall of a surface container and the nearest external property limit in which it can be built, external building or public communication route, shall not be less than the following:

Metres

Receipt or containers with capacity global no greater than 500 m3

30

Unit with unit capacity:

501 m3 and 1,000 m3

Between 1.001 m3 and 4,000 m3

90

Top 4,000 m3

120

2.7.3. To prevent passage or manipulation by unauthorized personnel, the area that includes the tanks, pumping equipment, and loading and unloading zone shall be protected by any of the following methods.

2.7.3.1. A minimum height of two metres and at least two emergency exits. This condition is considered to be met when the installation is integrated into a fenced and segregated area of the rest of that area.

2.7.3.2. Appropriate mechanisms that may be blocked in a position to prevent unauthorized persons from handling them.

3. Storage of liquids from the A2 subclass.

3.1. Design and construction.

3.1.1. The provisions of Chapter I (2), "Storage in fixed containers", shall be followed.

3.1.2. Different connections to the vents.

3.1.2.1. All connections to the tank, except those for sale and those without use, which must be covered, shall be fitted with closing valves located close to the wall of the container.

3.1.2.2. All connections, other than for sale, without use, and those with a passing hole of less than 1,5 mm in diameter, shall be fitted with emergency locking valves (such as flow-over valves, valves of retention on filling connections, automatic closing valves in case of fire, valve with remote control and closed except during operation among others).

When the emergency lock valve acts over excess flow, the value of the emergency valve that produces its closure is less than the theoretical value resulting from a complete break of the line or tab with which it is related.

The connection to the pipe container with a nominal diameter of more than 50 millimetres shall be welded or by means of flanges, with the possible exception of connections for locking valves, which can be threaded.

3.1.3. Each deposit will carry a liquid level meter. If the level meter is of float type or differential pressure, an additional level meter shall be available. Glass column meters that are not protected by adequate metal armor are not permitted.

The filling level of the tank shall be determined in such a way as to take into account the possible increase in the volume of liquid with the maximum temperature variation expected. The maximum filling level will always be fixed and with alarm device.

3.2. Identification plate.-Each tank must bear an identification plate as provided for in paragraph 2.2. 'Identification plate', of this Chapter.

3.3. Cooling system.-When necessary to maintain the design conditions, to install refrigeration or vapor extraction equipment, these shall comply with the requirements of paragraph 2.3 "Cooling systems", of the present chapter.

3.4. Sales of deposits shall comply with the provisions of Chapter I (3), "Storage in fixed containers".

3.5. Pipe systems. -As set out in Chapter I, paragraph 4, "Storage in fixed containers".

3.6. Tests.-Piping vessels and systems shall be tested according to Chapter I, paragraph 7, "Storage in fixed containers".

3.7. Surface provisions.

3.7.1. The deposits shall be installed outside the buildings.

Regardless of the distances set out in Chapter II, "Distances between installations and between containers", the separation between the wall of the tank and the nearest external property limit in which it can building, outside building or public communication route, shall not be less than the following:

Metres

capacity repository or repositories not greater than 500 m3 and not included in section 3.9 of this same chapter

30

Deposits with unit capacity:

501 m3 and 1,000 m3

60

1.001 m3 and 4,000 m3

90

than 4,000 m3

120

3.7.2. The deposits shall be arranged in the form indicated in accordance with the type of fire protection used.

3.7.2.1. If the water is applied with hoses, the groups will have a maximum of six deposits, separated from other groups, at least, by 15 meters. Horizontal tanks shall be oriented in such a way that their longitudinal axis is not directed to other reservoirs, loading and unloading stations, critical equipment or nearby buildings.

3.7.2.2. If the water is applied by fixed spray installations, the groups may have a maximum of nine separate deposits from other groups, at least for eight metres.

3.8. Buried disposition. -These include fully buried deposits, fully covered with land or combination of both. The provisions of Chapter I (5), "Storage in fixed containers" shall apply, except as follows:

1. These buried deposits will be located on the exterior of buildings and off the public roads. No other equally disposed deposits will be installed. The distance between deposits shall not be less than one metre.

2. ° When horizontal deposits with their longitudinal axes are available in parallel and in a single row the number of deposits in the group is not limited. When installed in more than one row the adjacent ends of deposits of two contiguous rows shall be separated not less than three metres.

3. ° The deposits may be located at a distance not less than 15 meters from the nearest property limit that can be built, via public communication or exterior building and at least eight meters from stations of loading and unloading.

4. ° The fully buried tanks shall have at least 150 millimeters below the level of the surrounding soil.

Total or partly ground-covered deposits shall have at least 300 millimeters of coating thickness or sufficient for a surface drainage without erosion or other deterioration.

Man's mouth, if it exists, will be accessible, not burying it or putting it in an archway.

The perimeter of the zone where deposits are installed in the form that is defined here will be permanently marked.

3.9. Deposits of less than 100 cubic metres.-When storage is carried out in tanks with a total capacity of less than 100 cubic metres and for stable liquids, the following exceptions shall be taken into account:

3.9.1. The minimum distances to maintain will be as follows:

Capacity
m3

Distance to property limit that can be built, public communication paths, or external buildings
m

Between repositories
m

Between depots and download mouths
m

Surface

Buried

0.50

3

2

From 0.51 to 2.50

3

3

1

3

8

8

1

8

10.1 to 100

15

15

1.5

15

3.9.2. Copper or copper alloys may be used for diameters of 16 mm or less together with steel, bronze, brass or equivalent ductility alloys. The pipe must be of a type without welding and the accessories will be constructed according to standards of recognized prestige. When welded pipes or fittings the input material shall have a minimum melting temperature of 535 degrees Celsius.

4. Vaporizers.

4.1. Generalities. When the storage of the stored liquid is necessary, vaporizers designed for this purpose shall be used. Coils or other means of heating shall not be installed in storage containers to act as vaporizers.

Vaporizers can be indirect heating (with water, steam or other heating means) or direct fire.

4.2. Design and construction.

4.2.1. The vaporizers shall be designed, manufactured and tested according to recognised solvency codes and in such a way as to provide the heat necessary to vaporise all the liquid corresponding to the maximum expected gas production. The materials will be compatible with the products to be handled under extreme design conditions.

4.2.2. The vaporization systems shall have means to enable the less volatile products to be drained which can accumulate in the liquid area.

4.2.3. When necessary, precautions shall be taken to prevent the accumulation of condensates in the gas discharge line, such as to isolate the line, to dispose of containers for the collection of condensates among others.

4.2.4. Valves shall be installed between the tank and the vaporizer to allow the blocking of the liquid and gas lines.

4.2.5. An appropriate automatic system shall be provided to prevent the passage of the vaporizer liquid to the gas discharge pipes.

4.2.6. The indirect heating vaporizers shall be designed to prevent the passage of vaporised gas into the piping of the heating medium in the event of a burst of the vaporizer tubes.

4.2.7. Direct fire vaporizers will have a device that cuts the fuel pass to the tuft when the pilot flame is powered off.

4.3. Vents. -For relief of the pressure, one or more safety valves shall be installed in the steam zone according to the design code applied and capable of evacuating a flow equivalent to the vaporizer's capacity.

The wet surface will be obtained by adding the heat exchange surface to the surface of the enclosure in contact with the liquid to be vaporized.

Indirect heating vaporizers with air, which have a volume of less than 1.2 cubic meters, do not need relief valve.

4.4. Identification plate. -Each vaporizer shall bear a plate containing at least the following information:

-Identification of the vaporizer.

-Design code (when applicable).

-Name of manufacturer, representative, legal, or importer.

-The vaporizer build date.

-Maximum work pressure and temperature in kilopascals and degrees Celsius, respectively.

-Exchange surface in square meters.

-Vaporization capacity in kilograms/hour.

4.5. Disposition.

4.5.1. The indirect heating vaporizers shall be installed at least two metres from the feeding vessel.

-Name and identification number of the manufacturer or his legal representative or importer.

4.5.2. Direct fire vaporizers shall be installed according to the following distances:

Canister Capacity
power
m3

Distance from the vaporizer to the canister, exterior building, buildable property limit, or public communication path
m

Distance to the mouth
Loading of cisterns
m

To 2.50

3

5

Of 2.51 to 10

8

15

10.1 to 100

18

18

THIRD SECTION

STORAGE IN MOBILE CONTAINERS

INDEX

1. Application field.

2. Exclusions.

3. Generalities.

4. Classification of the storage.

5. Fire protection.

1. Application field.

The requirements of this chapter apply to flammable liquid storage in mobile containers with a unit capacity of less than 3 cubic metres (3,000 litres) such as:

1.1. Fragile containers (glass, porcelain, stoneware and others).

1.2. Metal containers (tin cans, sheet metal, aluminium, copper and the like).

1.3. Non-metallic or fragile containers (plastic and wood among others).

1.4. Pressure vessels (cartridges and aerosols).

2. Exclusions.

The following containers or storage are excluded from the scope of this ITC:

2.1. Those used internally in processing facilities.

2.2. Those connected to fixed or portable vehicles or engines.

2.3. The storage of varnish paints or similar mixtures when they are to be used within a period of 30 days and for one time.

2.4. Storage buffers when their volume does not exceed the maximum indicated in tables I and II and their storage period is less than 72 hours.

2.5. Drinks, medicines, edible and other similar products, where they do not contain more than 50 per 100 in volume of flammable flammable liquid in water, and are in containers of a unit volume not exceeding 0,005 cubic metres (5 litres).

2.6. Non-combustible liquids in the conditions under which they are stored.

2.7. Bottles, bottles and any other movable container of compressed, liquefied and dissolved gas (excluding cartridges and aerosols).

2.8. Those located (or stored) in buildings with uses other than industrial uses, such as residential uses of assembly, hotels, educational establishments, institutional centres, etc., provided that they do not exceed the amounts shown below or protected closets or storage rooms are used: 0,06 cubic metres (60 litres) of products of Class A, 0,10 cubic metres (100 litres) of class B product or 0,25 cubic metres (250 litres) of class C.

3. Generalities.

3.1. For the purposes of this chapter, unstable liquids of Class B, C and D shall be treated as if they were sub-class B1 products. Flammable aerosols shall be treated as if they were sub-class B2 products.

3.2. Mobile containers must comply with the constructive conditions, tests and maximum unit capacities, as set out in the National Regulations for the Transport of Dangerous Goods by Road (TPC).

3.3. Medicines, beverages, cosmetics and other commonly used products may use the usual forms of packaging for retail sale.

3.4. Mobile containers with a unit capacity of more than 0,25 cubic metres (250 litres) shall be equipped with an emergency window of capacity not less than that laid down for fixed containers. The use of fuses shall be compulsory in cases where the stored products (e.g., drying oils, paints, etc.) may obstruct other means of venting. The melting temperature of these fuses shall not exceed 150 ° C.

3.5. Where the stored product consists of flammable or combustible liquids, coexisting with non-combustible or miscible products, the quantities of the latter shall not be computed for the purposes of stored volume.

3.6. The storage in the interior of buildings must be provided with a minimum of two separate access points. The actual maximum travel (sorting out piles or other obstacle) to the outside or to a safe escape route shall not exceed 25 metres. In no case shall the disposal of the vessels obstruct the normal or emergency exits or be an obstacle to access to equipment or areas intended for safety. This is excepted when the surface to be stored is 25 m2 or the distance to be traversed to reach the output is less than 6 m.

3.7. When liquids of different classes are stored in the same stack or shelf, the whole assembly shall be considered as a liquid of the most restrictive class. If the storage is carried out on separate stacks or shelves, the sum of the ratios between the quantities stored and those allowed for each class shall not exceed the value of 1.

3.8. Batteries of non-flammable products or fuels may act as separator elements between batteries or shelves, provided that these products are not incompatible with the flammable products stored.

3.9. In the case of shelving, strings or wooden supports shall be solid and of a minimum thickness of 25 millimetres.

3.10. The electrical installation shall be carried out in accordance with the Low-Tension Electrotechnical Regulation and in particular with its Instruction MI-BT-026 'Special provisions for installations at risk of fire or explosion'. The mechanical elements intended for the movement of the containers shall be suitable for the requirements resulting from the flammability characteristics of the stored liquids.

3.11. The containers must be grouped by palletizing, packaging, packaging or similar operations, when the stability of the assembly requires it or to prevent excessive effort on the walls thereof.

3.12. When the containers are stored on shelves or pallets, the sum of the heights of the containers shall be computed for the maximum permitted height.

3.13. The highest point of storage shall not be less than one metre below any beam, spray nozzle or other obstacle situated in its vertical, without exceeding the values indicated in the corresponding tables II and III.

3.14. The storage of products of classes A and B1 in basements shall not be permitted.

3.15. Indoor storage will be provided with natural or forced ventilation. In the case of liquid transfer of subclasses A2 or B1, the maximum achievable volume shall not exceed 0,04 cubic metres (40 litres) per square metre of surface or a forced ventilation of 0,3 cubic metres per minute and per metre shall exist. surface square, but not less than 4 m3/min with alarm for system failure. The ventilation shall be channelled to the outside by means of exclusive conduits for that purpose.

3.16. The steps to other dependencies must have automatic firewall doors of RF-60. A free aisle of at least 1 m shall be maintained unless a greater width is required in the applicable specific paragraph.

3.17. The floor and the first 100 mm (to count from the same) of the walls around the entire storage enclosure must be watertight to the liquid, including in doors and openings to avoid the flow of liquids to the attached areas. Alternatively, the floor may drain to a safe place.

3.18. Buildings intended for industrial storage must be equipped with lightning rods with the design conditions laid down in NTE-IPP (Technology Standard of the Installation of Pararrays).

4. Classification of the storage.

For the purposes of this ITC, the different types of mobile canister storage will be one of the following types:

Protected cabinets.

Storage rooms:

-Internal storage room.

-Separate storage room.

-Attached storage room.

Industrial storage:

-Indoors.

-Foreign.

Figure 1 allows you to clarify the different types of storage.

4.1. Protected cabinets.

Those with at least one RF-15 fire resistance shall be considered as such, in accordance with UNE 23.802. The cabinets must bear a sign that is clearly visible with the indication "Inflamable". No more than three closets of this type will be installed in the same dependency unless each group of three is separated by a minimum of 30 meters from each other. In the case of keeping class A products, the existence of an external ventilation is mandatory.

The maximum amount of liquids that can be stored in a protected cabinet is 500 l.

The maximum amounts allowed inside a protected closet are: 0.1 cubic meters (100 liters) of class A products, 0.25 cubic meters (250 liters) of class B products, 0.5 cubic meters (500 liters) of class C products, or sum of A, B, and C without exceeding the amounts of A and B specified above.

4.2. Storage rooms.

They are considered as those intended exclusively for storage that is located in or part of buildings.

They can be of three types:

A. Internal storage room.

B. Separate room.

C. Room attached.

4.2.1. Indoor storage room is the one that is completely closed inside a building and has no exterior walls.

Imagen: img/disp/1991/181/19404_002.png

Must have a fire resistance, maximum occupancy density, and maximum allowed volume to be noted in table I.

TABLE I

fire protection is available (***)

enclosure RF in minutes

Maximum Allowed Volume

Maximum Occupancy Density in l/m2

120

(*)

400

No

120

(*)

160

60

(**)

200

No

60

(**)

80

(*) The maximum stored product volume will be 60 per 100 of the one obtained from Table II.

(**) The maximum volume in this case is 40 per 100 of those listed in Table II.

(***) Fixed fire installation may be automatic or manual. The manual must be permanently available 24 hours a day, trained in its operation. These installations must be carried out in accordance with the relevant UNE standard.

No canister will be more than 6 m from a corridor.

The maximum height per stack will be as set in Table II (h. max.) except for Class B1 in containers larger than 100 litres which may only be stored at a height (layer).

4.2.2. Separate storage room is one that is located inside a building, has one or more exterior walls, must provide easy access for the means of extinction, by means of windows, openings or light walls fuels.

4.2.3. Attached storage room is one that only has a common wall with a building that has other types of occupations.

Storage in separate or attached rooms must comply with table II.

TABLE II

Container size (R)

R ≤ 25 litres

25 L< R ≤ 250 L

25 L< R ≤ 3,000 L

class

h max (m)

Vp stack (m3)

vg global (m3)

h max. (m)

Vp stack (m3)

vg global (m3)

h max (m)

Vp stack (m3)

vg global (m3

B1
Pe < 38ºC

1.5

2.5

7.5

1.8

2.5

7.5

2.5

2.5

7.5

B1
Pe ≥ 38 ° C

3

5

15

2.7

5

15

7.5

15

15

B2

3

45

45

15

45

45

2.5

15

45

C

4.5

50

150

3.6

50

150

2.5

75

150

D

4.5

50

300

4.5

50

300

75

75

300

Notes:

1. Pe is the boiling point.

H max. is the maximum allowed height.

Vp is the maximum volume per stack.

vg is the maximum global storage volume.

2. The maximum quantities may be doubled in the case of protection by automatic or manual fixed-extinction system, and in the second case there shall be personnel trained in operation during the 24 hours of the day. The facilities shall be designed in accordance with the UNE standards set out in the Annex which are applicable.

The structure, ceilings, walls that communicate with other dependencies or buildings must have an RF-120 fire resistance and the RF-60 doors.

4.3. Industrial warehouses.

These are those intended for the exclusive use of storage being their unlimited capacity and must meet the requirements listed below, depending on whether they are internal or external.

4.3.1. Industrial warehouses inside.

Such flags, buildings or parts thereof intended for specific storage use shall be considered as such that they must be separated from other buildings or property limits by at least 15 metres of free space, or by a wall with a minimum resistance to the RF-120 fire and provided with automatic fire resistance doors RF-60 at least.

No container shall be more than 6 m from a corridor provided the maximum stack volume and corresponding height of Table III are respected.

TABLE III

Battery capacity

Class

Canister

h
max.
(m)

R ≤ 25 l

h
max.
(m)

251 I ≤ 250 l

h
max.
(m)

250 l < R ≤ 3000

fixed protection (*) m3

With fixed protection (*) m3

No fixed protection (*) m3

With fixed protection (*) m3

No fixed protection (*) m3

With fixed protection (*) m3

B1
Pe < 38 ºC

1.5

7.5

15

1.8

7.5

15

7.5

7.5

15

B1
Pe ≥ 38 ° C

3

15

45

2.7

45

45

15

45

45

B2

4.5

50

150

30

90

90

2.5

30

90

C and D

4.5

100

300

3.6

100

300

2.5

100

300

Notes:

1. Pe is the boiling point.

R is the volume of each canister.

h is the maximum height per stack.

(*) The fixed fire protection system may be automatic or manual. The manual must be permanently available 24 hours a day, trained in its operation. These installations must be carried out in accordance with the relevant UNE standard.

2. In the case of storage on shelves, the height and the volume per stack shall be according to the system of protection used (see paragraph 5.5, referred to as "fixed extinguishing systems"), also being carried out in accordance with the relevant rules UNE, which must be justified in the project.

The main corridors will have a minimum width of 2.5 m. The side aisles a minimum of 1,2 m and the access to the doors windows or connections a minimum of 1 m.

The storage capacity of these industrial warehouses will not be limited, but they must be separated into batteries, as shown in Table III by an access corridor or a stack of non-flammable materials or fuels. (M.O. according to UNE 23,727). The minimum width in both cases shall be 1,20 m.

When the storage surface exceeds 2,500 m2 you must sectorize it with RF-120 firewalls or water curtains in sections less than or equal to 2,500 m2.

4.3.2. Storage on the outside. -It will be considered storage in mobile containers on the outside or in open structures when its open surface/volume ratio is greater than 1/15 m2/m3 and will be in accordance with the Table IV.

When the storage on the outside is made adjacent to an industrial building of the same property or under the same direction, a maximum of one cubic meter (1,000 litres) of products of Class B or C, if any, can be grouped together. Exterior walls of said building have a resistance to fire RF-120 at least and the openings of the walls are at least three meters from the storage.

In case the overall capacity exceeds the above figures the vessels must be separated by a minimum of three metres from the building. If the walls are protected with water curtain or walls of minimum resistance to fire RF-120, this distance may be reduced, after justification in the project, up to 1.50 meters.

The storage area will have an appropriate slope to prevent any leakage to the buildings, or be surrounded by a 150 mm height of minimum height. When the highlight is used, a drainage system for rainwater should be available for possible leakage of fire protection liquids and water.

The drain must end in a safe and accessible place in the event of fire.

For storage of less than 15 days, provided that it is sporadic and not normal, the given stack volumes shall not apply provided that a distance of more than 25 m is maintained at any time. building, installation, or property limit.

The distance from these storage to load and discharge stations for flammable liquids and storage parks for flammable liquids shall be at least 10 m.

TABLE IV

Class

h max. (m)

Canister size (R)

Distance between stacks
m

Distance to external properties
m

Distance to public communication paths
m

R ≤ 25 litres Vp (m3)

25 L< R ≤ 3,000 L Vp (m3

B1
Pe < 38ºC

2.7

7.5

15

1.5

12

6

B1
Pe ≥ 38ºC

3.6

15

30

1.5

12

6

B2

3.6

30

60

1.5

6

3

C and D

4.5

100

160

1.5

6

3

Notes:

1. R is the unit volume of the containers.

Pe is the boiling point.

Vp is the maximum volume per stack.

h max. is the maximum height per stack.

2. There will be corridors of four metres of minimum width to allow access to storage in case of fire. No mobile container will be more than 6 metres from one of these corridors. When all corridors and not only access in the case of fire, be 4 m, the stack volumes may be increased by 50 per 100.

3. Distances to public communication paths and other buildable properties may be reduced to 50 per 100 when the volume per group does not exceed 50 per 100 of the maximum volume allowed in the table or where appropriate protections exist. (firewall walls, fixed water systems, automatic sprayers or the like).

4. The maximum quantities may be doubled in the case where there is fixed, automatic or manual extinction protection, and in the second case there shall be personnel trained in operation during the 24 hours of the day. The facilities shall be designed in accordance with the applicable UNE standards.

5. Fire protection.

The following are considered Fire Extinction facilities:-Installation of Fire Bocas.

-Installation of Fire Bocks.

-Installation of Fire Hiding.

-Installing Seca Column.

-Installing Mobile Extants.

-Extinction Fixed Systems installations.

The storage facilities defined in this section must be provided with the means of fire protection specified in table V.

5.1 Fire Bocas.

The installation of Bocas de Incidio will be composed of the following elements:

-Fire Bocas equipped.

-Water pipeline network.

-Water supply source.

Equipped fire hydrants may be of two types of 25 or 45 mm and shall be provided with at least the following elements:

-Lanza: It must be of a material resistant to corrosion and to the mechanical efforts to which it will be subjected in its use.

A system of opening and closing shall be incorporated if the system does not exist in the nozzle.

-Manguera: Its interior diameters shall be 45 or 25 mm and its characteristics and tests shall be in accordance with the standard UNE 23.091.

-Racor: All connection fittings of the different elements of the equipped fire mouth will be solidly attached to the elements to be connected and comply with the UNE 23,400 standard.

-Valve: It must be made of metal material resistant to oxidation and corrosion. The fast closing (1/4 turn) will be allowed provided that the effects of the battering ram and the steering wheel are provided with a number of turns for opening and closing between 2 1/4 and 3 1/2.

-Support: You must have sufficient mechanical strength to withstand the weight of the hose, the actions derived from its operation. Both the type devanadera (reel to keep the rolled hose) and the folding type (support to keep the hose bent in zigzag), except in the type of 25 mm that will always be of devanadera. Both types of support will allow the hose to be properly oriented. For 45 mm hoses, the support must be able to rotate around a vertical axis.

-Armarium: All elements that make up the fire-mouth equipped must be housed in a cabinet of sufficient dimensions to allow the rapid and complete deployment of the hose, except in the 25 mm type in the which is not required for the cabinet.

All these elements must be properly coupled to each other, permanently connected to a always-in-charge water network that meets the conditions set for this type of facility.

The location and distribution of the fire hydrants equipped shall be carried out in accordance with the following general criteria.

-The fire hydrants equipped shall be placed on a rigid support so that the centre is not more than a height of 1,5 metres in relation to the ground. They shall be placed preferably near the doors or exits and at a maximum distance of 5 metres, a mouth shall always be installed, taking into account that they shall not constitute an obstacle to the use of such doors.

-The determination of the number of fire hydrants equipped and their distribution shall be such that the entire surface to be protected is at least by an equipped fire mouth.

-The maximum separation between each fire-mouth equipped and its nearest one shall be 50 m and the distance from any point of a protected premises to the nearest equipped fire-mouth shall not exceed 25 m. These distances shall be measured on actual routes.

-The fire hydrants equipped shall be marked as indicated in UNE 23.033.

-It shall be maintained around each fire mouth equipped with an obstacle-free zone that allows access and maneuver without difficulty.

The network of pipes to be seen shall be of steel, which may be of other material when it is buried or conveniently protected, of exclusive use for fire protection installations and shall be designed in a manner the following operating conditions are guaranteed in any of the fire hydrants equipped.

-Dynamic pressure at the tip of the spear will be at least 343 kPa (3.5 kg/cm2).

-The minimum flow rates will be 1.6 l/s for the 25 mm and 3.3 l/s for the 45 mm mouths.

These pressure and flow conditions must be maintained for an hour under the simultaneous operating hypothesis of the two hydraulically more unfavorable hydrants.

-The network will be protected against corrosion, frost and mechanical actions, at the points deemed necessary.

The source of water supply to this facility must meet the following requirements:

-If the public water supply services guarantee the conditions laid down in the preceding paragraph, the installation's power supply may be carried out on the general network and shall be independent of any other use and without having any counters or valves closed.

-If the public water supply services cannot guarantee the established conditions of supply it will be necessary to install a water tank with sufficient capacity and adequate pumping equipment to guarantee those conditions. Such pumping equipment shall be of exclusive use for this installation, except in the case referred to in the following paragraph.

-The installation may be fed from a general fire network to other protective installations, provided that the minimum required for each of the fires has been taken into account in the calculation of the supply. installations to operate simultaneously.

The installation of fire hydrants equipped shall be subjected before their reception to a test of tightness and mechanical resistance, subjecting the network to a hydrostatic pressure equal to the maximum service pressure plus 343 kPa (3.5 kg/cm2) and at least 980 kPa (10 kg/cm2), maintaining that test pressure for at least two hours, no leakage should occur at any point in the installation.

5.2 Fire hydrants.

Installation of fire hydrants will meet the following conditions:

-Fire hydrants can be of two types depending on their diameter: Type 80 mm and Type 100 mm.

In any case, the hydrants may be buried each in a single row with a single output or finished in a column provided with three outputs, whose diameters according to the column, shall be the following: Type 80 mm one output of 70 mm and two of 45 mm and Type 100 mm, one output of 100 mm and two of 70 mm.

-The hydrants will be prepared to resist frost and mechanical actions when necessary.

They shall be connected to the network by independent driving for each hydrant, the diameter of which is the same and the diameter of the network span to which the hydrant is connected at least equal to that of the hydrant.

-They shall be located in places easily accessible to the duly signposted and distributed Fire Extinction Service equipment in such a way that the distance between them is in no case greater than 80 metres.

-The design and supply of the network containing the hydrants shall be suitable for the use of the hydrocants whose simultaneous use is necessary the flow rate in each of them is at least under the hypothesis of putting into service. 500 litres/min for hydrants type 80 mm and 1,000 Iitres/min for hydrants type 100 mm, with a minimum pressure of 686 kPa (7 kg/cm2).

5.3 Seca Column.

The installation of Seca Column is for the exclusive use of the Fire Extinction Service and will be formed by a normally empty driving, which from the facade of the building generally runs through the stairway. and is provided with outlet mouths in floors and feeding on the facade for connection of the equipment of the Service or Fire Extinction, which is the one that provides to the conduction the pressure and the flow of water necessary for the extinction of the fire.

The pipeline will be galvanized steel and will have a nominal diameter of 80 mm whatever the number of floors in the building.

Each Dry Column will carry its own power outlet and the power outlet will be provided with a Siamese connection with built-in keys and UNE 23,400 type fittings, 70 mm in diameter and with caps attached to chains.

The power outlet will have a purge key with a minimum diameter of 25 mm to flush the column once used. It will be housed in a 55 cm wide range, 40 cm high and 50 cm deep, provided with white painted metal cover with the inscription "Exclusive use of firefighters", in red letter. The lid shall be provided with a simple slip lock for 8 mm quadrant key and hinges on the lower part of the lid that allow the total to be lowered.

The facade, with the center of its mouths at 90 cm from the ground, will be available in places accessible to the Fire Extinction Service and as close as possible to the column. In case of not being located next to the main access of the building, the same situation will be marked.

Output mouths on floors shall be fitted with UNE 23,400 type fittings, 45 mm in diameter with caps subject to chains.

They will be housed in a 55 cm wide range, 35 cm high and 30 cm deep, provided with cover with the inscription "EXCLUSIVE USE OF FIREFIGHTERS" in red letter.

The dry-column installation will be submitted prior to its receipt at a pressure of 1,960 kPa (20 kg/cm2), for two hours, without any leaks appearing at any point in the installation.

5.4 Mobile Extintors.

All the stores referred to in this ITC must be equipped with mobile fire extinguishers to be possible close to the exits and in places of easy visibility and access. At least one 144B efficiency extinguisher (according to UNE 23.110) and an appropriate extinguishing agent (usually dry powder) shall be available in such a way that the distance to be travelled horizontally from any point of the protected area to reach the nearest suitable extinguisher does not exceed 15 m.

Extinguishers will be reviewed periodically in accordance with current legislation and manufacturer recommendations.

The characteristics, quality criteria and tests of the mobile fire extinguishers shall be in accordance with the requirements of ITC-MIE-AP5 of the Pressure Apparatus Regulation and the relevant UNE standards.

-Your location must be marked according to UNE 23.033.

-Portable fire extinguishers shall be placed on supports attached to vertical parts or pillars so that the upper part of the extinguisher is not more than 1,70 m from the ground.

-Extinguishers that are subject to possible physical, chemical or atmospheric damage must be protected.

5.5 Fixed Extinction Systems.

Fixed extinguishing systems are aimed at controlling and extinguishing a fire by discharging into the protected area of an extinguishing product. These systems can act manually or automatically with the following systems:

-Installing water sprinklers.

-Extinction installations by dust.

-Extinction installations by gaseous extinguishing agents.

-Physical foam extinction facilities.

Water Rockers Facilities:

The composition of water sprinkler installations and the characteristics of their components shall be in accordance with the requirements of UNE 23,590 and UNE 23,591.

The water pipeline network will be for use only for fire protection facilities.

Feature spray heads shall be installed and in an appropriate number to cover the entire area to be protected according to the risk involved in the use of the building or area thereof, in accordance with the classification of risks as set out in UNE 23,592.

The functional characteristics of the installation, the disposal of the spray heads as well as the sizing of the network of pipes shall be determined in accordance with the provisions of UNE 23,593 and UNE 23,594.

The firing of the sprinklers may be manual or automatic.

The source of water supply to these facilities must meet the following requirements:

-If the public water supply services guarantee the functional conditions required according to the design of the food intake, it will be made to the general network, and must be independently of any other use without having to dispose counters or valves.

-If the water supply services cannot guarantee the established conditions of supply, a supply system that guarantees these conditions will need to be installed in the building.

The installation will be subjected to a test of tightness and mechanical strength and a hydrostatic pressure equal to the maximum service pressure plus 343 kPa (3.5 kg/cm2), maintaining said test pressure for two hours and no leaks should occur at any point in the installation.

Dust Extinction Installations:

The dust-extinguishing installation shall be in accordance with UNE 23,541 and UNE 23,542.

Extinguishing installations by gaseous extinguishing agents: Extinction installations by means of gaseous extinguishing agents may be of two types:

-Carbon dioxide (CO2) or halogenated hydrocarbons based systems according to UNE 23.607.

Systems per gaseous extinguishing agent (carbon dioxide or halogenated hydrocarbons) shall be composed of at least the following elements:

-Shooting mechanisms.

-Electrical or pneumatic control equipment.

-Pressure gas incipient.

-Pipeline for the extinguishing agent.

-Download difusers.

The trigger mechanisms will be by means of smoke detectors, fuse elements, contact thermometers or thermostats or manual firing in accessible place.

The capacity of the pressure gas canisters must be sufficient to ensure the fire extinguishing and the application concentrations shall be defined as a function of the risk, both requirements being justified.

This system will only be usable when the security or evacuation of personnel is assured. In addition, the trigger mechanism shall include a delay in its action and a warning system in such a way as to allow the evacuation of such occupants prior to the discharge of the extinguishing agent.

Foam Extinction Installations:

The foam extinguishing facility shall comply with the requirements of UNE 23.603, UNE 23,521 and UNE 23,522 (see also UNE 23.523, UNE 23,524, UNE 23.525, UNE 23,526 and UNE 23.604).

Installation of alarm and monitoring buttons.

Storage with a global capacity of more than: 20 cubic metres for Class A liquids, 50 cubic metres for Class B2 liquids, 500 cubic metres for Class C liquids shall have positions for the class. Alarm actuation which is less than 200 metres from the storage sites.

The alarm-drive positions may be replaced by portable transmitters held by watchdogs or service personnel.

A perfectly audible noise alarm shall be established throughout the area and other than those intended for other uses (the notice of beginning and end of the working day, for example).

The situation of the Alarm Pullers will be marked according to UNE 23.033.

The industrial warehouses referred to by this ITC must be adequately monitored 24 hours a day.

Water supply.

Set of water sources, driving equipment and general fire network to ensure, for one or more specific protection facilities, the water flow and pressure required during the time of autonomy required.

The water supply must be reserved exclusively for the fire protection system and under the control of the owner of the system. The public use networks are exempted from these conditions.

A water supply can feed more than one specific protection facility, provided that it is able to simultaneously ensure the flow rates and pressures of each installation in the most unfavourable case during the time of autonomy required. For these purposes, all the protective installations that could operate simultaneously in each case of fire must be considered, and the time of autonomy for all of them will be that of the one that requires it most.

It is not necessary, except for particular cases to justify it, to contemplate the coincidence of more than one fire with independent location.

All closing or sectioning valves which must remain normally open for the proper operation of the system shall be of an ascending spindle type, or shall have another device which allows to be easily verified. if they are in an open position. Its closing speed will be such that it avoids the risk of battering ram.

TABLE V

Fire protection based on the type of storage

Type

Extintors

Fire Bocas *

Hydros *

Dry Columns *

Fixed Systems

Armarium

Yes

Room

Yes

From 50 m3

(**)

Room

Yes

From 50 m3

(**)

Yes

If

From 50 m3

(**)

Store. inner

Yes

Yes (***)

Yes

(**)

Optional

Store. ind. exterior

Yes

Yes

Optional

(*) Whenever water is the appropriate extinguishing agent.

(**) When stored in buildings on floors above the first floor.

(***) When fixed installation is available, you do not need to install BIE.

Section 4

Periodic Inspections

According to the art. 6. of the Regulation on the Storage of Chemicals approved by R.D. 668/1980 of 8 February, every five years shall be carried out every five years for the periodic inspection of the storage of the following:

1. That in the five years there have been no extensions or modifications that alter the security conditions for which the initial project was approved. That if there have been extensions or modifications, these have been the subject of timely projects and authorizations.

2. That the product classes remain the same for which the initial project was approved.

3. That the form of storage is the same as the initial one.

4. That the distances and reducing measures continue to be the same.

5. That global capabilities remain the same.

6. The state of the walls of the cubetos, tank foundations, fencing, drains, etc., by visual inspection.

7. Verification of sales in the absence of a document supporting the maintenance of the plant for periodic testing.

8. Verification of the electrical continuity of the pipes or the rest of the metal elements of the installation if there is no documentary evidence of periodic testing of the plant maintenance service.

9. Visual inspection of the state of the walls of the fixed containers and thicknesses if significant deterioration is observed at the time of inspection.

10. Verification of having passed the mandatory inspections of those facilities or equipment that so require.

11. Checking:

-Water reserve.

-Foams reserve and quality analysis result copy.

-Operation of the pumping equipment.

-Cooling systems.

-Alarms.

-Extintors.

-Ignifed.

12. Grounding of cisterns.

13. Verification of the state of the hoses.

ANNEX II

Relationship of mandatory rules that are cited in this Complementary Technical Instruction

20.322-1986

Classification of sites with explosion risk due to the presence of gases, vapors, and flammable mists.

23.033-1981 Part 1

Fire safety. Senalization

UNE 23.091-1989 Part 1

Drive for the fight against fires. Part 1: Generalities.

23.091-1990 Part 2A

Drive for fire fighting. Flexible flat hose for light duty, diameter 45 mm and 70 mm.

23.091-1981 Part 2B

Drive for the fight fire. Part 2B. Flexible flat hose for hard service, diameters 25, 45, 70 and 100 mm.

23.091-1983 Part 3A

Drive for the fight fire. Semi-rigid hose for normal service of 25 mm in diameter

23.091-1990 Part 4

Drive for fire fighting. Part 4: Description of processes and apparatus for testing and testing

23.093-1981

Testing of the fire resistance of structures and building elements.

23.110-1975 Part 1

Fighting fires. Portable fire extinguishers

23.110-1978 Part 1 ERRATUM

Fire fighting. Portable fire extinguishers

23.110-1990 Part 1
1. modification

Fighting fires. Portable fire extinguishers. Part 1: Designation, effectiveness, type A and B fire type

23.110-1980 Part 2

Portable fire extinguishers.

23.110-1986 Part 3

Portable fire extinguishers. Third part

23.110-1984 Part 4

Portable fire extinguishers. Part 4: Cargas and minimum required homes

23.110-1985 Part 5

Portable fire extinguishers. Part 5: Complementary Specifications and Trials

23.400-1982 Part 1

Fire fighting equipment. 25 mm connection

23.400-1982 Part 2

Fire fighting equipment. 45 mm connection

23.400-1982 Part 3

Fire fighting equipment. 70 mm.

23.400-1982 Part 4

Fire fighting equipment. 100 mm connection

23.400-1990 Part 5

Fire fighting equipment. Connection fittings. Verification Procedure.

23.500-1990

Fire Water Supply Systems.

UNE 23.501-1988

Fixed water systems sprayed.

23.502-1986

Fixed water systems spray gives. System components

23.503-1989

Spray water systems. Design & Facilities

23.504-1986

Fixed water systems sprayed. Receive Trials

23.505-1986

Fixed water systems. Periodic testing and maintenance

23.506-1989

Fixed water systems. Specifications and hydraulic calculations

23.507-1989

Fixed water systems. Automatic detection equipment

23.521-1990

Low-expansion physical foam extinction systems. Generalities.

23.522-1983

Low-expansion physical foam extinction systems. Fixed systems for internal risk protection

23.523-1984

Low-expansion physical foam extinction systems. Fixed systems for the protection of external risks. Liquid fuel storage tanks

23.524-1983

Low-expansion physical foam extinction systems. Fixed systems for the protection of external risks. Spray foam

23.525-1983

Low-expansion physical foam extinction systems. Systems for the protection of external risks. Lance monitors and foam towers

23.526-1984

Low-expansion physical foam extinction systems. in receive and maintenance keys

23.541-1979

Fixed-to-dust fixed systems. Generalities.

UNE 23.542-1979

Fixed dust extinction systems. Total flood systems

23.590-1981

Water sprinkler systems. Generalities.

UNE 23.591-1981

Water sprinkler systems. Typology.

23.592-1981

Automatic sprinkler systems. Hazard classification

23.593-1981

Automatic sprinkler systems. Design parameters

23.594-1981

Automatic water sprinkler systems. Pipeline design

23.603-1983

Fire safety. External physical foam. Generalities.

23.604-1988

Fire extinguishing agents. Tests on the physical properties of low-expansion protein foam

23.607-1983

Fire extinguishing agents. Halogen hydrocarbons. Specifications.

23.727-1990

Fire reaction tests of building materials. Classification of materials used in construction

23.801-1979

Building element fire resistance test glazed.

23.802-1979

Fire-resistance testing of doors and other hollows-closing elements

UNE 23.806-1981

Essay behaviour in front of the fire. Water jet stability test of metal structure protective materials

51,022-1990

Oil products and lubricants. Determination of the point of inflammation in closed glass. PENSKY-MARTENS method.

51,023-1990

Oil products. Determination of the points of inflammation and combustion in the open glass. Cleveland Method.

51.024-1987

Oil products. Determination of the point of inflammation in closed glass ABEL-PENSKY