Government Decree No. 210 / 2001 Coll.
Government regulation laying down technical requirements for gas pressure vessels
Valid
Regulation
Effective from 01.01.2002
Text versions:
01.01.2002
25.06.2001
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210
GOVERNMENT REGULATION
of 21 May 2001
laying down technical requirements for gas pressure vessels
The Government orders pursuant to Section 22 of Act No. 22 / 1997 Coll., on technical requirements for products and on the amendment and addition of certain laws, as amended by Act No. 71 / 2000 Coll., (hereinafter referred to as "the Act") to implement Sections 12 (1) and (4), 11 (2) and 13 (2) and (4) of the Act:
(1) This Regulation lays down technical requirements for pressure vessels for the transport of gases (pressure vessels).
(2) For the purposes of this Regulation portable pressure vessels for the transport of gases in which an excess pressure of more than 0,05 MPa (0,5 bar) may be reached or developed shall be considered as pressure vessels.
(3) The products provided for in Article 12 (1) of the Act are pressure vessels.
(4) Pressure vessels are distinguished to:
(a) welded gas cylinders of non-alloy steel, made from several parts, of an effective wall thickness of 5 mm or less, capable of re-filling, of a capacity of 0,5 l to 150 l including, for use in the filling of compressed, liquefied or dissolved gases, with the exception of liquefied gases at very low temperature and acetylene, and for the transport of such gases; the calculation overpressure (Ph) of these cylinders shall not exceed 6 MPa;
(b) seamless steel gas cylinders, manufactured from one piece, capable of re-filling and transport, of a capacity of 0,5 l to 150 l inclusive, intended for filling with compressed, liquefied or dissolved gases, regardless of the number of throats;
(c) seamless cylinders for gases of non-alloy aluminium and aluminium alloys, manufactured from one piece, capable of re-filling and transport, of a capacity of 0,5 l to 150 l inclusive, intended for filling with compressed liquefied or dissolved gases.
(5) This Regulation shall not apply to:
(a) seamless steel bottles made of austenitic steel;
b. Seamless aluminium alloy bottles with a guaranteed lowest tensile strength exceeding 500 MPa;
(c) seamless bottles for which metal is added when the bottom is closed;
(d) pressure equipment, simple pressure vessels and aerosol dispensers according to specific legislation, 1)
(e) containers specially designed for nuclear purposes, the failure of which may cause the leakage of radioactivity;
(f) vessels specially designed to be placed on ships and on aircraft or for their propulsion;
(g) pipes and pipes.
(1) Technical requirements for pressure vessels ("essential requirements")
(a) in accordance with Article 1 (4) (a), are listed in Part I of Annex No 1,
(b) in accordance with Article 1 (4) (b), are listed in Part I of Annex 2,
(c) in accordance with Article 1 (4) (c), are listed in Part I of Annex 3.
(2) The technical parameters and calculations set out in the Annexes to this Regulation do not impede the application of the relevant Czech technical norem.2)
(1) Before placing pressure vessels on the market, the manufacturer or importer shall ensure that the conformity assessment [Paragraph 12 (4) (b) of the Law] of the sample (prototype) of the pressure vessel is carried out by an authorized person ("EEC pattern approval ') in accordance with Section 5.
(2) The manufacturer or importer, other than an EEC design approval for pressure vessels, shall ensure that the conformity [Paragraph 12 (4) (f) of the Act] of the product with a certified product type (EEC verification) is verified in accordance with Article 6, except:
(a) welded gas cylinders of non-alloy steel with a capacity up to 1 litre;
(b) seamless steel cylinders for gases with a test pressure of up to 12 MPa in the hydraulic test and up to 1 litre in volume;
(c) seamless cylinders for gases of non-alloy aluminium and aluminium alloys with a test pressure up to 12 MPa in the hydraulic test and up to 1 litre in volume.
(3) The declaration of conformity shall be drawn up in the Czech language and shall contain the following particulars:
(a) identification details of the manufacturer or importer issuing the certificate of conformity (first name and last name, permanent residence, place of business and identification number for a natural person or business name, registered office and identification number for a legal person),
(b) identification of pressure vessels (e.g. name, type, mark, design), for imported products also information on the manufacturer;
(c) the description and function of the pressure vessels and the manufacturer and, where appropriate, the importer for the purpose of their use;
(d) details of the conformity assessment method used;
(e) a list of the technical provisions used in the conformity assessment;
(f) details of the authorised person (company, registered office, identification number) and the registration number and date of issue of the authorised person;
(g) confirmation by the manufacturer or importer that the pressure vessels comply with the essential requirements and are safe under normal or, where appropriate, by the manufacturer or importer of the intended use;
(h) the date and place of issue of the certificate of conformity, the name and function of the responsible person of the manufacturer or importer and its signature.
(1) EEC approval of a model is a procedure whereby an authorised person shall:
(a) in accordance with point 3 of Part II of Annex No 1 for pressure vessels referred to in Article 1 (4) (a);
(b) in accordance with point 3 of Part II of Annex No 2 for pressure vessels referred to in Article 1 (4) (b);
(c) in accordance with point 3 of Part II of Annex 3 for pressure vessels referred to in Article 1 (4) (c)
assess the conformity of the pressure vessel sample (prototype) with the essential requirements and confirm that the pressure vessel sample complies with those requirements.
(2) If the sample (prototype) of the pressure vessel complies with the essential requirements, the authorised person shall issue an EEC pattern approval certificate
(a) in accordance with point 4 of Part II of Annex No 1 for pressure vessels referred to in Article 1 (4) (a);
(b) in accordance with point 4 of Part II of Annex No 2 for pressure vessels referred to in Article 1 (4) (b);
(c) in accordance with point 4 of Part II of Annex 3 for pressure vessels referred to in Article 1 (4) (c).
(3) If the authorised person finds that the batch of pressure vessels produced does not conform to the approved model, he shall notify the manufacturer in writing to make appropriate changes in the production; if the manufacturer does not make such changes, the authorised person shall revoke the certificate (Section 11a (3) of the Act).
(1) EEC verification is a procedure whereby an authorised person checks on a specified number of samples of pressure vessels that:
(a) the pressure vessel complies with the requirements of this Regulation;
1. in accordance with point 6 of Part II of Annex No 1 for pressure vessels as referred to in Section 1 (4) (a);
2. in accordance with point 6 of Part II of Annex No 2 for pressure vessels referred to in Article 1 (4) (b);
3. in accordance with point 6 of Part II of Annex No 3 for pressure vessels referred to in Article 1 (4) (c),
(b) the pressure vessel belongs to the category for which EEC pattern approval is carried out and whether it complies with the approved model; in the procedure referred to in Article 4, it shall also ascertain whether it is marked with the EEC pattern approval mark referred to in Article 4 (2).
(2) In the case of the procedure provided for in Section 4, the authorised person shall also verify that the pressure vessel complies with the requirements for placing marks under this Regulation.
(3) Upon compliance with the requirements referred to in paragraph 1, the authorised person shall issue an EEC verification certificate:
(a) according to Part V. of Annex No 1 for pressure vessels referred to in Article 1 (4) (a);
(b) according to Part VII of Annex No 2 for pressure vessels referred to in Article 1 (4) (b);
(c) according to Part V. of Annex 3 for pressure vessels as referred to in Section 1 (4) (c).
(1) This Regulation shall enter into force on 1 January 2002, with the exception of the provisions of Sections 4, 5 of Part II and III of Annexes 1 to 3 thereto, which shall take effect on the date of the entry into force of the Treaty of Accession of the Czech Republic to the European Union.
(2) Paragraph 3 will expire on the date of entry into force of the Treaty of Accession of the Czech Republic to the European Union.
Prime Minister:
v. PhDr. Špidla v. r.
1. Prime Minister and Minister for Labour and Social Affairs
Minister for Industry and Trade:
Doc.
Příloha č. 1
Annex No. 1 to Government Decree No. 210 / 2001 Coll.
TECHNICAL REQUIREMENTS FOR CHANGED STEEL GAS BOTTLE
Technical requirements
1. SYMBOLS AND INJURY
1.1 The symbols have the following meaning:
Ph = hydraulic test pressure (calculation pressure) in 0,1 MPa;
Pr = cylinder rupture pressure measured at 0,1 MPa during the burst test;
Prt = calculation of the lowest theoretical burst pressure in 0,1 MPa;
Re = minimum yield limit guaranteed by the manufacturer for the bottle made in MPa;
Rm = minimum value of tensile strength guaranteed by the material standard in MPa;
Rmt = actual tensile strength in MPa;
a = the calculation of the smallest wall thickness of the cylindrical casing in mm;
b = the calculation minimum thickness of rounded bottom in mm;
D = nominal outer diameter of the bottle in mm;
R = internal radius of curvature of the convex bottom in mm;
r = internal radius of curvature in the convex bottom transition area in mm;
H = outer height of the rounded part of the bottom of the bottle in mm;
h = height of the cylindrical part of the rounded bottom of the bottle in mm;
L = length of cylinder cover loaded with overpressure in mm;
A = materiality of basic material in%;
Vo = the initial volume of the bottle at the time of increasing the excess pressure during the burst test in I;
V = final volume of the burst bottle in I;
Z = coefficient of weld value.
1.2 For the purposes of this Annex, "burst pressure 'means the excess pressure when plastic instability is achieved, that is the highest pressure achieved in the burst test.
1.3. Normalising annealing
1.4 Removal of internal stresses
The term "removal of internal stresses' refers to the heat treatment to which the manufactured bottle is subjected and during which the bottle is heated to a temperature below the lowest point of steel conversion (Ac1) in order to reduce residual stresses.
2. REQUIREMENTS FOR VIAL AND COMPETENCE
2.1. Materials
2.1.1. The material used for the production of overpressure tyres is steel according to EURONORM standard 120- 83.
2.1.2. All parts of the bottle body and all parts welded to it are made from mutually compatible materials.
2.1.3. The additional welding materials are selected in such a way that the characteristics of the formed welds are equivalent to those laid down for the basic material.
2.1.4. The bottles shall be accompanied by a certificate of analysis of the taveb steels supplied for the production of excess pressure parts.
2.1.5 In addition, independent chemical analyses may be carried out. These analyses shall be carried out on test samples taken either from materials in a condition supplied by the bottle manufacturer or from manufactured bottles.
2.1.6. The manufacturer shall submit to the authorised person the results of the metallurgical and mechanical tests and tests carried out on the welds, including a description of the welding methods and procedures in place that can be considered representative of the welds produced during manufacture.
2.2. Heat treatment
The bottles shall be supplied either in a standardized state or in a state after removal of the inner tension with the manufacturer's confirmation that the bottles have undergone heat treatment and the heat treatment process used after all welds have been performed. Local heat treatment is not permitted.
2.3. Calculation of excess pressure parts
2.3.1. The thickness of the cylinder shell wall at any point in the overpressure casing shall not be less than the thickness calculated by the formula:
2.3.1.1 for bottles without longitudinal welds:
a = Ph. D20Re43 + Ph
2.3.1.2 for bottles with longitudinal welds:
a = Ph. D20Re43Z + Ph
Z is equal to:
- 0.85, if the manufacturer conducts an X-ray inspection of the crossing of welds within 100 mm of the crossing in the case of a longitudinal weld and 50 mm in length (on each side of the crossing of 25 mm) in the case of a circuit weld. X-genographically, it is checked from each machine by one bottle selected at the beginning and end of each working shift.
- 1 if the manufacturer carries out a random X-ray check on the crossing of welds up to 100 mm from the crossing in the case of a longitudinal weld and 50 mm in length (on each side of the crossing of 25 mm) in the case of a circuit weld.
This check shall be carried out on randomly selected 10% of the bottles produced.
If these X-rays reveal unacceptable defects as defined in Section 7.4.1.4 of Part II, all necessary steps shall be taken to review the dose and to remedy the defects.
2.3.2 Dimensions and calculation of the day of the bottles (see figures in Appendix 1 to this annex)
2.3.2.1. The bottom of the bottles shall meet the following conditions:
- Torospheric bottom
simultaneously valid limits: 0,003 D ≤ b ≤ 0,08 D
r ≥ 0,1 D
R ≤ D
H ≥ 0,18 D
r ≥ 2 b
h ≥ 4 b
- ellipsoid
simultaneously valid limits: 0,003 D ≤ b ≤ 0,08 D
H ≥ 0,18 D
h ≥ 4 b
- semi-spherical bottom
Limits: 0,003 D ≤ b ≤ 0,16 D
2.3.2.2. The thickness of these rounded days shall at no point be less than the value calculated using the formula:
b = Ph. D20Re43 C
The full bottom shape coefficient C values are given in the table in Appendix 1 to this annex.
However, the nominal thickness of the cylindrical edge of the bottom shall not be less than the nominal thickness of the cylindrical part determined according to the formula in paragraph 2.3.1.2 for Z = 1.
2.3.3 The nominal wall thickness of the cylindrical part and the rounded bottom shall under no circumstances be less than:
- D250 + 0,7 mm if Ph < 3 MPa,
- D250 + 1 mm if Ph ≥ 3 MPa,
with a minimum value of 1,5 mm in both cases.
2.3.4 The body of the bottle, except for the valve coating, may be made of two or three parts. The gout shall be of one piece and convex.
2.4. Design and quality of design
2.4.1 General requirements
2.4.1.1. The manufacturer shall have the means and technology to ensure that the manufactured bottles comply with the requirements of this Annex.
2.4.1.2. The manufacturer shall check the defects of the parent sheets and pressed parts used for the manufacture of bottles. Parts for which defects have been identified which may adversely affect the operational safety of the bottle cannot be used for production.
2.4.2. Parts loaded with pressure
2.4.2.1. The manufacturer shall describe the welding methods and procedures used as well as the checks carried out during manufacture.
2.4.2.2 Technical requirements for welding
Blunt welds shall be carried out using an automatic welding process.
The blunt welds on the shell loaded with pressure shall not be placed in the position where the shape changes.
The contact welds shall not overlap the blunt welds and shall be at least 10 mm from them.
The welds connecting the parts forming the bottle shell shall be carried out under conditions (see examples of welds in Appendix 2):
- longitudinal weld: this weld is performed as a blunt weld in the full section of the wall,
- circumferential weld with the exception of the weld attached to the valve to the top of the bottle: this weld is performed as a blunt weld in the full section of the wall. The lined joint is considered to be a special kind of blunt weld,
- Circular weld attaching the valve barrel to the top of the bottle's bottom: this weld can be made either as a blunt weld or as a corner weld. If it is a blunt weld, it shall be made in the full section of the wall. The lined joint is considered to be a special kind of blunt weld. This does not apply to cases where the top of the bottle is a cylinder for the valve inside the bottle and where the cylinder is welded to the bottom by a weld which does not participate in the leakage (see Appendix 2 to this annex, Figure 4).
In the case of blunt welds, the affiliation of contact surfaces shall not exceed 1 / 5 of the wall thickness (1 / 5 a).
2.4.2.3. Welding control
The welds must be fully welded, not show any deflection of the welds and be free from defects which could jeopardise the safe use of the bottle.
In the case of bottles of two parts, excluding weld as shown in Figure 2 And in Appendix 2, the circumferential blunt welds shall be X-ray inspected over a length of 100 mm, and one bottle selected at the beginning and one bottle selected at the end of each shift shall be inspected during continuous production and, in case of production interruption, for more than 12 hours, the first welded bottle.
2.4.2.4 Ovality
The cylinder housing shall be limited so that the difference between the largest and the smallest outer diameter of the same section is not greater than 1% of the mean value of these diameters.
2.4.3 Accessories
2.4.3.1 The handles and protective rings shall be manufactured and welded to the body of the bottle in such a way that they do not cause dangerous voltage concentrations or allow water to accumulate.
2.4.3.2. The heel of the bottle shall be sufficiently firm and of a metal compatible with the steel of the bottle; The shape of the heel shall provide sufficient stability for the bottle. The upper edge of the foot shall be welded to the bottle so that no accumulation or penetration of water can occur between the heel and bottle.
2.4.3.3. The identification plates, if any, shall be attached to the overpressure on the bottle casing and shall not be removable; all necessary measures must be taken to prevent corrosion.
2.4.3.4. Any other material may be used for the manufacture of the feet, handles and protective rings provided that its strength is assured and the risk of corrosion of the bottle bottom is excluded.
2.4.3.5. Protection of tap or valve
The tyre or valve of the bottle must be effectively protected either by its design or by the cylinder structure (for example by a protective ring) or by a protective hat or a fixed housing.
Conformity assessment procedures
1. EEC SAMPLING
1.1 EEC approval of a model may be granted in respect of types or types of bottles.
"Type of bottle 'means bottles of the same construction and thickness, equipped with the same accessories, manufactured in the same workshops of the same technical specification, welded in the same process and heat treated under the same conditions.
"Type series of bottles' means three-part bottles made in the same factory which differ only in length within the following limits:
- the smallest length shall not be less than three times the diameter of the bottle,
- the maximum length shall not be greater than 1,5 times the length of the test bottle.
2 APPLICATION FOR EEC APPROVAL OF SAMPLING
2.1 An application for EEC pattern approval shall be submitted for each type of bottle or for each type series of bottle of documentation required for the verification and a batch of 50 bottles from which the required number of bottles for the tests below is withdrawn, as well as any additional information required. Specify the type, temperature and endurance of the heat treatment and the welding process used. In addition, a certificate of analysis of taveb steel delivered for bottle production shall be submitted.
2.2 The application and the corresponding correspondence shall be drawn up in the Czech language. The attached documents shall also be drawn up in the Czech language.
2.3 The application shall contain the following information:
- the name and address of the manufacturer or applicant, their authorised representative and the place or places of manufacture of the bottles,
- bottle category,
- the intended purpose of use or the prohibited uses,
- technical data,
- trade name, if any, or type.
2.4 The application shall be accompanied by two copies of the required documents, in particular:
2.4.1. Description containing:
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Regulation Information
| Citation | Government Decree No. 210 / 2001 Coll., laying down technical requirements for gas pressure vessels |
|---|---|
| Regulation Type | Regulation |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 25.06.2001 |
|---|---|
| Effective from | 01.01.2002 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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