The Republic of Latvia Cabinet of Ministers Regulations No. 242 in Riga on 18 July 2000 (pr. No 32, § 14) rules relating to simple pressure vessels Issued in accordance with the law "on conformity assessment" article 7 General questions 1. these provisions define the essential safety requirements which must be respected, so designed and constructed that simple pressure vessels, and this compliance monitoring mechanism to, simple pressure vessels properly installed, maintained and used, prevent threats to human health, life and the environment, as well as simple pressure vessels for conformity assessment and market surveillance procedures.
2. these provisions shall apply to transactions with a simple pressure vessels-welded non-alloy steel, aluminium or aluminium alloys not ageing tanks, which are subject to internal pressure greater than 0.5 bar, and which are intended for the storage of air or nitrogen, but not for the heat with open flame or hot flue gas (tank). Tank the following characteristics: 2.1. maximum working pressure (PS) not exceeding 30 bar (bar), and pressure multiplied by (V) tank capacity in litres (l) (PS x V) not more than 10000 bar x l; 2.2. lower working temperature (Tmin) is not lower than-50 ° C and higher working temperature (Tmax) is not higher than + 300 ° C in steel tanks and about + 100 ° C, aluminium or aluminium alloy vessels;
2.3. components that provide the pressure tank to the strength of the part is made of non-alloy steel, aluminium or aluminium alloys not ageing;
2.4. the tank made of cylindrical parts made dished and flat-topped, with the rotation axis coincide, or the tank is just two dished ends, which the rotation axis coincide.
3. These provisions shall not apply to the provisions referred to in paragraph 2 of the tanks, if they are used for the following purposes: 3.1. specially designed for use in nuclear power plants and from the accident may occur leakage of radioactive substances;
3.2. tanks designed to be installed on ships and aircraft, or their recovery sources;
3.3. the tank used for fire extinguishers.
4. The Ministry of welfare, in cooperation with the relevant technical standards Committee recommends a national non-profit society with limited liability "standard" reliance standard.
5. the national non-profit limited liability company "Latvian standards" submit for publication in the newspaper "journal" the Latvian national standard list that you can apply these rules determine the essential safety requirements (applicable standards).
6. internal market: offer to sell, or put in use to give to against or without payment — allowed only receptacles which comply with the provisions mentioned in the second chapter of the essential safety requirements and are marked with the eighth of these provisions of the CE marking specified in chapter (annex), which certifies compliance with this provision of the tank requirements. Offering tank internal market, accompanied by the manufacturer's instructions under this provision in paragraph 37.
7. If the tank is used in the manufacture according to applicable standards and all the requirements in this standard is certified with the attestation of conformity procedures, considered that this provision in the second chapter in essential security requirements are met.
8. market surveillance functions in the trade and service sectors take the consumer protection centre, the supervision and control of whether enterprises (companies) and places of work they are used according to the tanks, the national labour inspectorate, the vehicles braking systems air compensation Chamber (resīver) carried out the supervision and control of road safety Directorate (hereinafter referred to as the market surveillance authorities). The market surveillance authorities shall take all necessary measures with a view to monitoring the internal market and the use of only the tanks, which, according to the installed, maintained and used without risk to human life, health and the environment. 9. Vessels shall be assessed by competent authorities notified. To be an institution to carry out the assessment of conformity, it shall ensure that the following minimum requirements: 9.1 the institution, its Director and the staff responsible for receptacles the conformity assessment and attestation procedures, not the tank Designer, manufacturer, supplier, installer or user, or their authorized representative. Exchange of technical information between the manufacturer, its authorized representative or the importer and the authorized institution is permitted;
9.2. evaluation and certification procedures are performed at high professional level, in good faith, and technically competent. The institution is free from any influences (especially financial), which might influence their judgement or the results of the checks. This is particularly true for people who are interested in the results of the evaluation;
9.3. the institution has adequate staff and technical equipment to be able to perform properly the technical and administrative tasks connected with inspection and surveillance procedures;
9.4. the staff responsible for the checks is: 9.4.1. appropriate technical and professional background;
9.4.2. sufficient knowledge of inspection procedures and experience in carrying out checks;
9.4.3. skills review, report and certificate in design;
9.5. staff remuneration does not depend on the amount of the checks or tests and results;
9.6. the institution shall insure its liability for the results of work which it is empowered to make;
9.7. the institution staff respect the confidentiality and do not disclose information which it acquired their professional tasks, except for the information that an official request to the authorities in accordance with these rules and regulations monitored or controlled tanks.
10. The Latvian National Accreditation Bureau, which appreciated the competence of notified bodies systematically verify this provision 9.2. in point 9.3 and specific requirements.
11. The Ministry of welfare is responsible for submitting proposals for the Cabinet of Ministers on the appropriate competent accreditation of conformity assessment bodies.
2. Essential safety requirements 2.1 materials 12. Tanks tanks materials as appropriate for the intended conditions of use of the tank, these rules 13, 14, 15, 16, 17, 18, 19 and 20 in.

13. The materials from which made this rule 2.2. and 2.3. tanks and referred it to the component surface, subjected to pressure must: 13.1. weld, flexible and resistant to the lowest working temperature of the tank to avoid tears or cracks;
13.2. such that it does not affect aging.
14. the unalloyed steel must be: 14.1. flexible and malleable after normalization treatment (or equivalent processing);
14.2. with carbon, less than 0.25% and sulphur and phosphorous — not more than 0.05%;
14.3. with the following mechanical characteristics: 14.3.1. the maximum tensile strength (Rm max), not less than 580 N/mm2;
14.3.2. elongation after rupture (A), if the test sample taken parallel to the rolling direction: 14.3.2.1. If material thickness is 3 mm and more, elongation after rupture (A) is 22% and more, which sample length (Lo) is the square root of the sample x 5.65 cross-sectional area (Soa) in millimetres;
14.3.2.2. If material thickness is less than 3 mm, the elongation after rupture (A80 mm) is 17% and more, which sample length (Lo) is 80 millimeters;
14.3.3. elongation after rupture (A), if the test sample perpendicular to the rolling direction: 14.3.3.1. If material thickness is 3 mm and more, elongation after rupture (A) 20% or more;
14.3.3.2. If material thickness is less than 3 mm, the elongation after rupture (A80 mm) is 15% and more;
14.3.4. the average gap power (KCV) J/cm2, which determined three longitudinal samples below the working temperature must not be less than 35 J/cm2 of the inspection, provided that a separate sample, it is not less than 25 J/cm2.
15. If the tank use the lowest working temperature is lower than-10 ° C and the wall thickness is greater than 5 mm, the rule laid down in paragraph 14.3. mechanical properties must be checked.
16. Aluminium or aluminium alloys shall meet the following requirements: non-alloy aluminium in 16.1 at least 99.5% aluminium;
16.2. aluminium alloys, of which made this rule 2.2. and 2.3. tanks and referred to their constituents, have sufficient resistance to the corrosion starpgraud maximum working temperature. Aluminium alloys listed must be: 16.2.1. plastic refrigerated condition;
16.2.2. with the following mechanical characteristics: 16.2.2.1. the maximum tensile strength (Rm max) is less than 350 N/mm2;
16.2.2.2. the elongation after rupture (A) must be: 16.2.2.2.1. If the test sample is taken parallel to the rolling direction, — 16% and more;
16.2.2.2.2. If the test sample is taken perpendicular to the rolling direction, less than 14%.
17. These rules 14 and 16 the materials referred to in paragraph adds material certificate of conformity – the document by which the manufacturer, or certification authority, which made the material certification, confirmed that the material complies with the requirements. The certificate shall contain the test results, in particular chemical composition and mechanical properties of the test results obtained during the material. If the material is material issued to the certificate of compliance, verification of the material is required.
18. Welding tank, the materials from which it is made, must be compatible with the weld material.
19. The ingredients that ensure the integrity of the containers (such as studs, nuts), is made from materials that comply with these rules 14 and 16 the requirements set out in the paragraph, or of alloy steel, aluminium or aluminium alloys that are mutually compatible.
20. For aluminium and aluminium alloys in the minimum operating temperature check the extension and plasticity.
21. All the welded tank parts, which are not subjected to pressure, shall be made of material that can combine with those parts of the tanks with which they should be sametin.
2.2. Tank design 22. Designer defines the purpose of the tank and down: 22.1. the lowest working temperature (Tmin);
22.2. the highest working temperature (Tmax);
22.3. the maximum working pressure (PS).
23. If the selected working temperature is lower than-10 ° C, the relevant material properties of the tank must remain-10 ° c.
24. the designer will comply with the following conditions: 24.1. it must be possible to check the tank from the inside;
24.2. it must be possible to drain the tank and cleaned;
24.3. the tank mechanical properties remain throughout the intended use of the tank;
15.2. intended purpose of use of the tank it is sufficiently protected against corrosion that can be evaluated under actual conditions of use;
24. in the light of the technological process and design characteristics of the tank, no load, which could reduce the safety of the use of the tank;
24.6. the inner pressure does not exceed the maximum working pressure (PS) (it is acceptable that for a short time, the internal pressure can exceed the maximum working pressure of about 10%).
25. Welding circular and garenšuv, use the caurmetināšan method or method of equivalent efficiency. Curved ends unlike dished ends must be made with the edge of the cylinder.
26. the tank design method chosen by the designer with the following: 26.1. If PS and V is not greater than 3000 bar x l, tank wall thickness for the determination of the choice of method of calculation or the experimental method;
26.2. If PS and V greater than 3000 bar x l or if the maximum operating temperature of more than + 100 ° C, tank wall thickness detection select the calculation method.
27. the tank and all of the cylindrical part of the wall thickness of steel tanks must not be less than 2 mm and aluminium or aluminium alloy vessels — less than 3 mm. 28. using the calculation method, the pressure of minimum thickness shall be calculated, subject to the intensity and voltage: 28.1. the calculation pressures must not be less than the selected maximum working pressure;
28.2. the allowable housing the voltage must not exceed the limits of the maximum yield working temperature (Ret) [N/mm2], the lowest of the values in the RET or 0.6 tensile strength (Rm) [N/mm2]: 0.3 Rm;
28.3. in determining the allowable voltage, use a skin RE and Rm minimum of material guarantees its manufacturer;
28.4. the cylindrical part of the tank if you have one or more garenšuv that are not used for automatic welding, welding, the calculated pressure of minimum thickness shall be multiplied by a factor of 1.15.

29. Using the experimental method, the calculation of wall thickness to the ambient temperature in the tank pressure resistance equivalent to at least five times the maximum working pressure with permanent circle deformation coefficient of not greater than 1%.
2.3. manufacture of 30 Tanks tanks constructed and carried out production checks appropriate to that rule 38 the technical documentation referred to in.
31. the preparation of the component parts of the tank (for example, creating and chamfering) must not cause surface defects and cracks or change the mechanical properties, which could reduce the safety of the tank.
32. the pressure tank, part of the weld zone and next to the weld material properties must be the same. The seams should not contain any surface or internal defect that could impair the safety of the tank.
33. A tank welded by qualified welders or welding operators who have the appropriate level of qualification, according to the certified welding procedures. Welders and welding operators qualifications certify competent personnel certification bodies.
34. the manufacturer of the tank during manufacture ensures a constant quality of welding, making appropriate checks and by using appropriate procedures. These checks reflects the relevant reports.
3. information appearing on the tanks To 35. tank or on the tank plate information the manufacturer specifies the following information: 21.8. the maximum working pressure (PS), bars (bar);
35.2. the maximum working temperature (Tmax);
35.3. the minimum working temperature (Tmin) in degrees Celsius (° C);
35.4. (V) tank capacity in litres (l);
22.1. the manufacturer's name and/or term;
22.1. container type and series identification;
35.7. (the last two figures of the year), the CE marking has been affixed.
36. If you use the information plaque, it must be made in such a way that it cannot be reused. Information plaque must be large enough to accommodate the additional information.
37. the manufacturer's instructions shall include the following information: 37.1. This provision of the information referred to in paragraph 35, except the tank serial identification;
37.2. the intended use of the vessel;
37.3. the requirements for the safe maintenance of the tank and installation (Assembly).
38. the technical documentation shall contain the tank: 23.7. detailed drawings of the tank;
38.2. the manufacturer's instructions;
23.8. documents containing information about: selected materials 38.3.1.;
38.3.2. selected welding methods;
38.3.3. selected checks;
38.3.4. tank components listed tank project.
39. If the tank is carried out verification or compliance declaration in accordance with the provisions of the sixth or the seventh chapter, the technical documentation shall also include: 24.3. the appropriate welding method and welding the welder or operator certificates of qualification;
24.4. the strength of the tank affecting components and Assembly of materials used in the manufacture of test reports;
39.3. inspections and control statements or descriptions of the inspections provided for.
40. Tank technical documentation uses the following definitions and symbols: 24.9. calculate the pressure P is chosen by the manufacturer of the pressure used to determine the thickness of the parts subject to pressure;
40.2. the yield point of the material of the RET is the value at the maximum working temperature Tmax is the same as: the yield point ReH 40.2.1. material that is both lower and higher yield stress, or;
40.2.2. the proof stress Rp0, 2, or;
40.2.3. proof stress Rp1 .0 (for aluminium, not alloyed);
40.3. the tanks are of the same type if they differ only in the sample diameter and supported this provision in paragraph 28 or 29 of the said requirements or if the cilindriskaj parts are subject to the following conditions: If the sample addition 40.3.1. ends are one or more comprehensive rings, type tanks within at least one comprehensive ring;
40.3.2. If the sample has only two hemispherical or convex ends, the type within the tanks not housing;
40.3.3. the possible length of the tank, which may cause cracks or density loss, identifies each separate;
25.1. the series is 3000 tanks and several containers of the same type that are made within a period of one year;
25.2. tank series production is the manufacture of containers of the same type in the same continuous production process and within the period specified by the project.
4. Tank circulation 41. internal market internal market can offer tank: tank designer or 25.5. manufacturer (manufacturer), also the person following the tanks designed and manufactured for personal use;
41.2. the tank manufacturer's authorized distributor;
41.3. tank importer.
42. The tank is not considered in the present internal market if it: 42.1. sent the manufacturer's authorised representative in Latvia, which carries out the development of the tank, to meet the requirements of this regulation, or to provide the attestation of conformity of the tank;
42.2. the treatment of imported or development and after the leaving of Latvia;
26.3. made in Latvia for sale outer market.
43. The tanks which do not comply with the requirements of this regulation, allowed to play fairs, exhibitions, demonstrations, and similar events, if they are clearly visible indication of non-compliance with the requirements of this regulation and marketing restrictions. During the operation of vessels may only, provided that you comply with all security measures to avoid damage to human life, health, property or the environment. When these receptacles are provided for the internal market, it must conform to the requirements of this regulation.
44. The tanks pressure and volume of the work product (PS x V) 50 bar x l or less, manufactured in accordance with the requirements of these provisions and good practice in using the technology industry's professional recommend production technology. These containers shall be marked with the CE marking, but they indicate that rule 35 (except for 22.2.) this information.
45. before the construction of the vessels for which the work product of the pressure and volume of (PS x V) is greater than 50 bar x l, manufacturer: 45.1. If tank designed to be manufactured in accordance with applicable standards of your choice authorized institutions shall be submitted:

45.1.1. This provision referred to in paragraph 38 of the technical documentation, that the notified body shall assess and, if technical documentation meets the requirements of these regulations, issue a certificate of conformity to technical documentation;
45.1.2. tank model for which the notified body carries out type-examination in accordance with the provisions of the fifth chapter, requirements and certifies that the submitted a prototype vessel satisfies the requirements of this regulation;
45.2. If the tank is not expected to be made in accordance with the applicable standards or only partially manufactured in accordance with applicable standards, provides a sample of the tank type-examination in accordance with the provisions of the fifth chapter.
46. This provision referred to in paragraph 45 tanks that provide the information referred to in paragraph 35.
47. before placing containers in the internal market, the manufacturer, his authorized representative or the importer shall assess the tank pressure and the volumetric parameters and respectively: 29.3. Optional tank verification carried out in accordance with the provisions of the sixth chapter of the Declaration of conformity or containers in accordance with the provisions of the seventh chapter, if the tank pressure and volume of the work product is greater than 50 bar x l but not exceeding 3000 bar x l; 47.2. tank verification in accordance with the provisions of the seventh chapter If the working pressure of the tank and the volume of the product is greater than 3000 bar x l. 48. all conformity assessment documents prepared in the national language.
5. check the tank type 49. Tank type-examination is the procedure whereby a notified body assesses and certifies (certified) that a prototype vessel satisfies the requirements of this regulation. To make a tank type-examination, the manufacturer shall submit to the institution of the authorized indicating the manufacturer's name, address and place of manufacture of the tank's address. Applications shall include a technical file.
50. Type examination includes: 50.1. technical documentation and a tank sample check;
50.2. comparison whether the tank is manufactured in conformity with the technical documentation and may safely be used under its intended working conditions;
50.3. the necessary examinations and tests in order to assess compliance with this provision of the tank in the second chapter.
51. If the examined prototype vessel satisfies the requirements of this regulation, an authorized institution issuing the tank type-examination certificate, certifying that the tank type tested fulfils specified requirements, determines the term of validity of the certificate and give guidance on the conditions of use of the certificate, as well as, if necessary, be accompanied by the descriptions and drawings to identify at the certified sample.
52. the institution of the justified reasons may be: 52.1. issue not tanks of the type-examination certificate or the extension of the period of validity of the certificate, on which it shall communicate to the other notified bodies;
52.2. revoke certificates issued by it shall immediately communicate to the other notified bodies, market surveillance authorities and other authorities which, in accordance with these rules and regulations is monitored and controlled the action with tanks.
6. the verification of vessels 53. verification of the tank is a transaction in which the producer at the time of construction of the tank shall take the necessary measures to comply with the tank certified or certified for the type of technical documentation, and declares this compliance.
54. the manufacturer shall ensure appropriate labelling of each tank to CE marking and compliance with the Declaration.
55. the manufacturer shall provide the notified body homogeneous series tank and take the necessary steps to demonstrate that the manufacturing process ensures the homogeneity of vessels of a specified period of time. Each tank series adds a tank type-examination certificate, or if the tank is not made in accordance with a specimen tank certified technical documentation. The notified body before the verification of vessels tank technical documentation conformity with the requirements of this regulation.
56. the institution of a series of tanks, the uniformity test for each tank carries the hydraulic test or a pneumatic test of equivalent effect to the pressure (Ph), which is 1.5 times the pressure to which the tank was designed. Pneumatic inspection observe the necessary safety precautions.
57. the notified body shall carry out the necessary weld tests at the manufacturer's choice of individual welds specimen from the tank to the tank or concrete tank from the series. The tests shall be carried out for the garenšuv metinātaj. If welded in different šķērsšuv used in welding technology than will be tested also šķērsšuv garenšuv. Tanks used in the design of the experimental method in accordance with paragraph 29 of these rules, these tests shall be replaced by the hydraulic test of five drums, which selected from a series of tanks, using statistical methods, in order to ensure compliance with this provision in paragraph 29.
58. If the tank is recognized as satisfying the requirements of this regulation, an authorized institution shall ensure that each of these series tanks with authorized authorities marking identification number. The notified body shall issue the certificate of verification for checks carried out these tanks. All the series tank (except for hydraulic or pneumatic damaged during the test) can offer within the internal market.
59. following coordination with the authorized body of the tank at the time of manufacture, the manufacturer may affix the notified body of the tank with an identification number and CE marking.
60. If the notified body finds that a series of vessels do not meet the requirements of this regulation, it shall take appropriate steps to prevent the offering of these receptacles the internal market.
7. Declaration of conformity 61 tanks. If the manufacturer declares conformity of vessels that each container shall be marked with the CE marking and draws up a declaration of conformity for tank compliance with technical documentation, certified in accordance with the requirements of these provisions, or tanks that are certified in accordance with the requirements of this regulation.
62. to declare the conformity of the receptacles, the manufacturer before continuing manufacture of receptacles shall be submitted to the authorized institution which issued the tank type-examination certificate or certificate of conformity to technical documentation, a description that includes the following information: a description of the plant and 62.1. tank design examination;

62.2. test reports indicating the tank during preparation of the tests performed and test results, as well as the test procedures and the dates on which they are made;
38.7. at the time of manufacture of the vessels of the checks carried out and their results the description;
38.8. information concerning staff carrying out this provision 38.7. checks referred to in point. Staff must be qualified and independent of the staff involved in the production process, the qualification and independence must be evidenced in writing;
62.5. the hydraulic or pneumatic tests carried out after the construction of vessels;
38.9. shop floor and warehouse address, as well as the time when planned to continue production of tanks.
63. If the manufactured tanks working pressure (PS) and volume (V) is the product of more than 200 bar × l, the notified body that has issued the tank type-examination certificate or certificate of conformity to technical documentation: 39.2. monitors tank manufacturing process during which the individual inspection of vessels, paying special attention to: 63.1.1. technical documentation;
63.1.2. tanks of the type-examination certificate or certificate of conformity to technical documentation;
63.1.3. the checks performed and test results;
39.3. ensure that this provision is made in paragraph 62 referred to in that schedule;
63.3. manufacturing site or warehouse with statistical methods select samples, to carry out the necessary checks.
8.64. CE marking the CE marking (annex) constitutes the capital letters CE.
65. If the CE marking is the size of the increase or decrease, followed the instructions in the sample proportions.
66. The two components of the CE marking is the same vertical dimensions, which may not be less than five millimeters.
67. the CE marking shall be accompanied by the manufacturing inspection the notified body involved in the identification number.
68. the CE marking shall be placed on each (affixed) in the tank it must be easily legible and indelible.
69. Allowed to label the containers with the other signs and symbols, provided they do not mislead about the meaning or form of the CE marking and CE marking does not reduce visibility and clarity.
70. where the market surveillance authorities and other authorities in accordance with these rules and regulations and monitor the tank controls, establishes that the CE marking on the tank are not justified, it shall inform the manufacturer, the manufacturer's authorized representative or the importer, whose job is to ensure that the tank meets the requirements of the law and do not prevent such infringement.
71. where unreasonable marking of tanks with the CE marking, however, is continued, the institutions concerned shall take the necessary measures to restrict or prohibit the placing of vessels referred to in the internal market, or to ensure their withdrawal from the market or use.
Prime Minister a. SMITH Welfare Minister a. Požarnov rules shall enter into force on 22 July 2000, the annex of the Cabinet of Ministers of 18 July 2000, regulations No 242 CE marking the CE marking consists of the capital letters CE. A sample of the label is as follows: Minister of Welfare in Požarnov (A).