Circular 42/2015/tt-Bldtbxh Dated: Issued National Technical Regulation On Labor Safety For Gas Pipeline System Fixed By The Metal

Original Language Title: Thông tư 49/2015/TT-BLĐTBXH: Ban hành Quy chuẩn kỹ thuật quốc gia về an toàn lao động đối với Hệ thống đường ống dẫn khí đốt cố định bằng kim loại

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Number: 49 /2015/TT-BLTBXH
Hanoi, December 8, 2015


The National Technical Standards Board of Labor Safety

for the fixed-metal gas pipeline system. i


Base of Protocol 106 /2012/NĐ-CP The Government of the United States on 20 December 2012 of the Government rules the functions, duties, powers, and organizational structure of the Ministry of Labor and Social Affairs;

Base of Protocol 127 /2007/ND-CP August 1, 2007 of the Government Regulation the implementation of some of the provisions of the Standards Law and Technical Regulation;

Base of Protocol 132 /2008/NĐ-CP December 31, 2008, of the Government Regulation of the Blueprint of certain provisions of the Law Quality Law, goods;

On the recommendation of the Bureau of Public Safety;

The Minister of Labor-Trade and Social Affairs issued the National Technical Regulation of the National Technical Standards on Labor Safety for the fixed-metal fixed gas pipeline system.

What? 1. It is accompanied by this Smart National Technical Standards for the Safety of Labor for the fixed-metal fixed gas pipeline system.

Symbol: QCVN 22 :2015/BLTBXH.

What? 2. It has been in effect since 25 January 2016.

What? 3. Ministries, peer agencies, government agencies, the People's Committee of the Provinces, the Central City and the organizations, the individual are responsible for the execution.



Lp Yeh

QCVN 22: 2015 /BLTBXH



National technical regulation on safe work of gas transmission pipeline

First words

QCVN 22: 2015 /BLTBXH-National technical regulation of labor safety on a fixed-metal fixed gas pipeline system by the Department of Labor Safety, Ministry of Labor-Trade and Social Services issued in accordance with the Digital Information Administration. 49 /2015/TT-BLTBXH December 8, 2015, following the opinion of the appraisal of the Ministry of Science and Technology.



National technical regulation on safe work of gas transmission pipeline

1. General Regulation

1.1. Adjustment range

1.1.1. This standard specifies the design, fabrication, installation, inspection and testing of the fixed-metal fixed-pipe system used for gas transport purposes.

1.1.2. This standard also regulates safety in operation, maintenance of fixed-metal gas pipeline systems.

1.1.3. This regulation does not apply to: Design and manufacture of pressure vessels in QCVN 01 :2008/BLTBXH. Fixed-metal gas pipelines are metal-temperature on 232 ° C or below −28 ° C. The pipeline in the natural gas extraction plant and the refinery, the pipeline of gas treatment plants. The pipe is in the gas extraction from the drilling in the sea. Design and manufacture thermal exchange equipment. Liquefied natural gas pipeline system. The pipeline system is liquid petroleum.

1.2. Apply objects

This standard applies to:

1.2.1. Organizations, individuals who produce, import, circulate, install and use a fixed-metal fixed gas pipeline system.

1.2.2. Organs and organizations, other individuals are involved.

1.3. Explain the word:

1.3.1. Pipeline systems: including pipelines and all other parts installed with the same pipeline.

1.3.2. Maintenance: maintenance activities such as test of the pipeline system, corrosion recovery, repair of welts, replacement of damaged parts.

1.3.3. Operation: implementation of the gas conducer function of the pipeline system pursuits to the manufacturer's instructions in the scope of compliance with the regulator's regulations and current regulations.

1.3.4. Operator: The unit is responsible for the operation of the gas pipeline system.

1.3.5. The pipe: is all the parts through which the gas is transported, including pipes, valves, joints, spade edges ...

1.3.6. The valve is blocked: the valve is installed for the purpose of locking or blocking the flow of gas in a pipe.

1.3.7. One-dimensional valve: the valve is designed to allow the flow of air to follow one dimension and will automatically close to prevent the flow of gas moving in the opposite direction.

1.3.8. Safety valve: is a hydraulic device used to adjust the pressure in a pipe or gas tank or liquid. Safety valve in the input pressure device group.

1.3.9. Nominal tube diameter: the designated diameter or the production diameter of the pipe.

1.3.10. Heating before welching: is the process of increasing the temperature of the heat-affected region during solstiing to reduce the hardness of the material, avoiding the cracks caused by the brittle material.

1.3.11. Stress: the quantity of force of force on an area unit (N/m2).

1.3.12. It is the polarotor of a metal surface that is corrosed to reduce the rate of corrosion.

1.3.13. In addition to these terms, this standard uses the terms defined in the US standard ASME B31.8-2007-"Gas Transmission and Distribution Piping Systems".

2. Technical regulation:

2.1. Technical General Regulations:

The object-fired gas pipeline system and the applicable scope in Section 1.1 must ensure minimum technical requirements under regulations at the United States Standards ASME B31.8-2007.

2.2. Specific rules:

2.2.1. Process requirements

Prior to the implementation of the pipe welter, the pipeline component or related devices need to establish the full welter technology process, which specifies which standard, process, process, standards and requirements for the operator of welt work, tinker and tinker. must have enough power to meet the healing process. Heating requirements before welt:

-The carbon of carbon is the carbon component that exceeds 0.32% or the carbon component (C + ¼ Mn) exceeding 0.65% must be heated before welt.

-For the steel components that have a carbon component of less than 0.32% but the process of solvenizing the chemical composition, the metal temperature, the ambient temperature, the material thickness, or the first shape of a welterhead shape requires a pre-thermal treatment. We have to do it.

-In the case of a variety of different weldiform materials that require a different temperature temperature, it applies to the material that has a higher temperature temperature.

-The heating can be done by any proper method but must satisfy the temperature of the heating temperature no less than the specified minimum in the welded process. Productivity reduction requirement:

a) The cases must reduce the stress:

-Carbon welts with carbon steel components that exceed 0.32% must be reduced to stress.

-For the welts that have a steel component of carbon less than 0.32% but due to other factors that the fast-cooled welterline also requires reducing the stress.

-The contacts with carbon steel have a nominal pipe thickness of excess of 3.2 cm. In the case of weling the components with different pipe thickness and the same material must apply:

+ For the composition of greater thickness.

+ The thickness of the pipe or the pipe in the case of a brandiated link, the slide face, or the nosehole joints.

-When any raw material of the welterline requires depleation of the stress.

b) Power reduction temperature:

-The stress reduction must be performed at temperatures by or above 600 ° C for carbon steel and by or above 650 ° C for iron alloy steel.

-In the case of reducing the stress for the connection between multiple components requiring different depleation temperature, apply to higher temperature requirements.

-Require heat from the specified temperature and maintain at this temperature for a certain period of time. This time is calculated on the basis of at least an hour for every 2.5 cm of the width of the tube, but no matter how small the tube is to be less than 30 min. Then it gets cold. Check the soles:

The examination is done with the naked eye by the person with sufficient expertise through the appropriate experience and training.

For the welded welts on the tangerine stress stress 20% less than the specified minimum yield yield:

-A certain number of contacts must be randomly selected by the operating unit from regular test work by X-ray imaging, ultrasonic testing, particle testing, or other non-destructive testing methods. However, for the soles at the gas compressuris, the traffic points, the main junction points of the highway and the junction points of the railway, must be fully checked.

-Check the connections must be checked with the naked eye on the ducts. The contacts detected had the incident to be repaired or removed from the pipeline system.

-For the soles on the tube that is subject to the tangerine stress rate by or above 20% higher than the specified minimum yield yield:

-The quality of the soles will be checked with the naked eye.

-All welts do not have to be removed or repaired.

-All trials, tests, fixes must be documented in writing and saved by the operation unit.

2.2.2. Corrosion control requirement: External corrosion control:

a) For the pipeline buried under the ground

-Request protection coating:

+ The surface of the pipe must be cleaned from harmful materials such as: detergents, rusty layers, humidity, dirt, oil, paint. The surface of the pipe must be checked in accordance with the non-protruding rule through the coating. Any flaws or irregularation must be eliminated.

+ The mantle, the corresponding assembly connection and the patchwork must be scrutinated for selection in order to adapt to the installation conditions, humidity intake, the operating temperature of the pipelines, environmental factors (including the nature of the land exposed to the layer). I ' m going to be able to do that.), the properties that cling to and power

+ The coating must ensure effective adhediation for the pipeline.

+ The mantle must be checked with the naked eye damage before the pipe is installed. The insulation coating on the power source and the power load line must be checked on the holidays with the appropriate measure.

+ Arranging or storing pipes in the appropriate method of miniming the damage to the coating.

-Catode protection requirements:

+ There is no need for a catodes protection in the case of proof by test or trial that does not need to use this method but still ensure a safe request.

+ All devices or tubes that are installed underground or buried with a insulated coating must be made available for the method of protection at the start of the operation, except for those with limited life expectancy.

-The insulation requirements:

+ Every pipeline and device with a coating must be insulated at all connections to the external system including the fuel pipeline.

+ The steel pipe must be insulated from cast iron, cast iron, and parts made of color metal.

+ Need to conduct electrical testing for the path system to locate unintended contact with other metal devices. If there is contact, you have to be excluded.

b) For the path of the pipeline:

-Paradise pipelines must be protected from corrosion by proper coating or casing.

-The surface covered will be removed from the impurity, e.g. corrosion, moisture, iron scales, dirt, paint ...

-The chosen mantle must have properties that are consistent with the environment. This coating must ensure the complete coverage of all the exposed sections and ensure the requirements or recommendations of the manufacturer. Anti-corrosion control inside:

If the air transport in the pipeline is not a corrodiant, it does not require an internal corrosion measure.

When designing a new pipeline system or replacement pipeline system or additional system improvements or existing system improvements, it is necessary to apply one of the following anti-corrosion measures below:

a) Use the (plating in) measure:

-The plating layer must meet the quality parameters and the thickness of the minimum dry coating must be calculated based on the type of coating and method of coating.

-Strict approval of the corrosion rules in the coupling position.

-When corrosion inert is used as an additive for the flow of gas:

+ The inert-resistant spraying department into the gas flow will be further calculated into the design.

+ The operation of this inert-resistant injection process must be in the operation plan.

+ This process of monitoring devices must ensure the constant assessment of the corrosion process.

+ Substances that inert corrosion must be the substance that does not affect any details of the pipeline system.

b) Use the gas treatment in the pipeline:

-A separate device or desalination device.

-Consider the use of the device to remove the impurity from the gas in the pipeline.

2.2.3. Requirements for testing and testing of the gas pipeline system: The results of every test and experiment with any component of the pipeline system, the name and address of the person conducting the tests and testing must be stored with the attached signature and signature. Requirements for design testing:

a) The design test is conducted to verify that the pipeline system ensures safety coverage for use. This process includes the examination of the following documents:

-The materials and the calculations to choose the material.

-Technical drawings describing the active scheme, the specifications of the gas pipeline system.

-The safety measures will apply to the pipeline system relying on specific calculations on the environment placing the pipeline and related conditions.

-Document manual, installation and maintenance.

b) The design test must rely on criteria:

-Gas pipeline systems are eligible for stable, safe operation.

-Has taken into account the anti-corrosion measures both inside and outside.

-Select a material selection that is consistent with the environment and other conditions that ensure the safety of the pipeline.

-There is a specific installation manual for each specific environmental condition.

-There are regulations and specific technical requirements for the soles to ensure the safety of the pipeline.

2.2.4. Requirements for operation and maintenance: The operating unit must build operational and maintenance processes based on the provisions of this Regulation, experience, knowledge, and other conditions where the pipeline system works. To cater for the operation and maintenance work, the unit operates the right gas pipeline system:

a) A text of the conduct and maintenance processes in accordance with the Regulation;

b) Build a written incident processing process for emergencies. There must be an emergency procedure table at the workplace to when an emergency incident, any employee can follow each step to the initial process as informed of who, stop the system ...;

c) Operations and maintenance of the pipeline system that is consistent with these built methods;

d) Modified, improved periodic methods according to the practical experience of equipment operation;

e) conducting training for staff on operational and maintenance processes; and for example.

f) Save the records to manage the methods and perform good training for the staff. Requirements for operating and maintenance methods:

a) There must be detailed methods and guidelines for the staff team on the operation process and maintenance of equipment in the usual operational and repair conditions.

b) There must be special attention to the major risks that threaten people in emergencies.

c) There must be regulations on periodic examination of the entire line of the gas pipeline system or in the main parts of the system. Requests related to the emergency incident processing method:

a) The emergency incident processing process needs to provide a minimum of the following content:

-The department receives, identify, and classify emergency cases that require immediate response when there is an incident;

-specify the responsibility for the guidance of the worker to perform the process, and is responsible for the training of these processes;

-Stating the individuals responsible for updating the project;

-Control of emergency situations, which include instructions for the first person to detect the incident;

-Report and provide evidence for emergencies.

b) Training program:

-The operating unit will have to have a responsible staff training program in the implementation of the emergency incident handling procedures.

-This program can be done through verbal instruction, by documentation, and in some cases may be guided by the team and the internship.

-This program must be set up and maintained continuously, data storage files on this program must be maintained to build the appropriate training program for each employee.

3. Regulation of safety management in manufacturing, import, circulation, installation and use of the gas pipeline system:

3.1. The technical records of the gas pipeline system include:

3.1.1. The general theory; the calculation of the pipe selection; the endurance and stability nature of the pipeline or their background;

3.1.2. The overall drawing of the gas pipeline system includes the main sizes and parameters;

3.1.3. Detailed drawings of metal surfaces;

3.1.4. The process of making special parts;

3.1.5. Testing and testing.

3.1.6. Installation guide and safety operation.

3.2. The conditions ensure safety of the water-produced gas pipeline system:

The gas pipelines that are under the regulation range of this Regulation must have:

3.2.1. Enough technical records.

3.2.2. A valid publication, a valid certificate (in accordance with the appropriate method of evaluation: method of 8 regulations at the Digital Information 28 /TT-BKHCN December 12, 2012 by the Ministry of Science and Technology);

3.2.3. Mounting a contract before making traffic on the market;

3.2.4. Under the supervision of the monitoring of the quality of the product quality, the goods of the Ministry of Labor and Social Affairs.

3.3. The conditions ensure safety of the imported gas pipeline system:

3.3.1. The imported gas-fired gas pipeline system must satisfy the regulation at section 3.1 and be published in accordance with the specified contract by the designated certification organization of Vietnam or the organization of foreign certification acknowledged under the national convention. The Socialist Republic of Vietnam was a member or international agreement with which the authorities of the Socialist Republic of Vietnam signed.

3.3.2. In the case of gas-fired gas pipelines that follow the bilateral agreement, the multilateral between the competent organ of the Socialist Republic of Vietnam with the exporting gas pipeline exporting countries does not have to examine quality when entering the country. These gas pipelines are exempt from the import.

3.3.4. The imported gas pipeline does not respond to regulation at section 3.1, when imports must be designated as designated or acknowledged under the international treaty that the Socialist Republic of Vietnam is a member or international agreement. The authorities have the authority of the Socialist Republic of Vietnam to sign the regulation at the entrance.

3.3.5. The imported gas pipeline must be given the quality of the order, the procedure stipulated, and is processed if there is a statutory violation.

3.4. The conditions ensure safety of the gas-fired gas pipeline system in the market:

The unit that provides the gas-based gas pipeline on the market must follow the following requirements:

3.4.1. Compliance with regulations in the process of preservation, gas pipeline circulation pursuant to the manufacturer ' s guidance from damaging or affecting the quality of the pipeline;

3.4.2. Mounting a contract before making traffic on the market.

3.5. Installation of the gas pipeline system installation:

The gas pipeline system is only installed when there is sufficient following conditions:

3.5.1. There's enough technical records.

3.5.2. The gas-produced gas pipeline in the country must be legally certified, which is legally required. The imported gas pipeline must have a complete profile of the customs procedure;

3.5.3. Parts, details are accompanied by synchrony; if built in the federated form of many firms, the assurance of technical properties is that of the manufacturer of the gas pipeline system.

3.6. Requirements for the installation of gas pipeline systems

The unit installation, calibration, maintenance and repair of the gas pipeline system must have enough of the following conditions:

3.6.1. Legally, there is an agency with the authority to register active business in this field;

3.6.2. Enough technical staff has trained in specialized engineering. There are skilled engineering workers, trained and certified safe-level certification;

3.6.3. There are enough technical conditions, the ability to technology for installation work, calibration and repair;

3.6.4. Compliance with the installation guidelines, operation, use of the fabrication house and must ensure the specifications of the gas pipeline system according to the technical records;

3.7. Manage the use of gas pipeline systems:

3.7.1. The gas pipeline system must be operated, maintained, maintained, and tested regularly according to the manufacturer's guidelines.

3.7.2. Safety requirements for using the gas pipeline system: Using only a well-developed gas pipeline system, it has been tested for safety techniques. No use of the gas pipeline system has been damaged in detail, the department is important; Operating the gas pipeline system works in accordance with the correct specification and traffic characteristics that the manufacturer has specified (or the traffic provided by the new use management unit after renovation, repair ...); There are methods and manpower that are always ready to address the emergency incidents. There must be safety measures to ensure the safety of the person, supplies, equipment and works where the gas pipeline system passes through. The restoration organization in time of the damage was discovered; Each gas pipeline system must have a maintenance monitor, periodic repair, replacing the parts that are content-based in the manufacturer's regulations; It is necessary to record the entire active history of the gas pipeline system for testing, tracking, maintenance, and timely detection of the damage. The person responsible for technical management and management of the gas pipeline system must be basic training in terms of a career in which he is assumed; safe training, first labor hygiene, prior to the delivery, annual periodic training and training. is granted a secure training certification by regulation; a clear understanding of the gas pipeline system and the part where it is in charge; knowing the standards, the safety of the safety specifications associated with the gas pipeline system. There are preventable measures, which handle random fires such as the leakage, due to the photovolcic lake, due to the gas-cutting welts.

4. Technical testing of gas pipeline systems

4.1. The gas pipeline system before entering into use must be first checked, periodically testing in the process of use, and an unusual test under the regulatory process issued by the Ministry of Labor-Trade and Social Affairs.

The inspection of the safety of the gas pipeline system must be held by the Department of Labor Safety, the Ministry of Labor and Social Affairs appointed by the order of the law.

4.2. During the inspection process, the regulatory organizations and the management unit using the gas pipeline system must closely comply with the safety of the safety of the fixed-metal gas-fixed gas pipeline system by the Ministry of Labor-Trade and Industry. Social media.

4.3. The gas pipeline after the test is required to be labeled as prescribed.

4.4. The fixed-gas pipeline system test cycle is a test, examination of outside 03 years/once and examination, examination of a total of 06 years per year.

5. Inspector, check and dispose of the breach

5.1. Inspector and breach of the breach in the implementation of this Regulation provided by the state inspector of labor.

5.2. The examination of the quality of production, import, circulation and use of gas pipelines is carried out under the Product Quality Law, commodities.

6. Responsible for organizations, individuals

6.1. Organizations, individuals for manufacturing, import, circulation, installation repair, management and use of the gas pipeline system are responsible for compliance with regulations at this Regulation.

6.2. This standard is the base for the body to examine the quality of the gas pipeline system to conduct inspection and also base for organizations to assess the progress of a valid certification.

7. The organization performs

7.1. The Department of Labor Safety, Ministry of Labor-Trade and Social Affairs is responsible for guiding and examining the implementation of this regulation.

7.2. The state governing bodies of local labour are responsible for guidance, inspector, examining the implementation of the provisions of this Regulation.

7.3. The procedure is valid after 6 months, since the date of the signing.

7.4. In the course of execution, if there is an entangrium, the agencies, organizations, individuals who are involved have a timely responsibility to reflect with the Ministry of Labor-Trade and Social Affairs to review the ./.