BS EN ISO 13341-2010 Gas cylinders Fitting of valves to gas cylinders《气瓶 气瓶阀门的配件》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 13341:2010Gas cylinders Fitting of valves to gas cylinders (ISO 13341:2010)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (

2、c) BSIBS EN ISO 13341:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO13341:2010. It supersedes BS EN ISO 13341:1998 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PVE/3, Gas containers.A list of organizati

3、ons represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 56930 2ICS 23.020.30; 23.060.40Compliance with a British Stand

4、ard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2010.Amendments issued since publicationDate Text affectedLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Unc

5、ontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13341 October 2010 ICS 23.020.30 Supersedes EN ISO 13341:1997English Version Gas cylinders - Fitting of valves to gas cylinders (ISO 13341:2010) Bouteilles gaz - Montage des robinets sur les bouteilles gaz (ISO 13341:201

6、0) Gasflaschen - Eindrehen von Ventilen in Gasflaschen (ISO 13341:2010) This European Standard was approved by CEN on 25 September 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national

7、 standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any

8、other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denm

9、ark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA

10、TION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13341:2010: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29,

11、 Uncontrolled Copy, (c) BSIBS EN ISO 13341:2010 EN ISO 13341:2010 (E) 3 Foreword This document (EN ISO 13341:2010) has been prepared by Technical Committee ISO/TC 58 “Gas cylinders” in collaboration with the Technical Committee CEN/TC 23 “Transportable gas cylinders” the secretariat of which is held

12、 by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. Attention is drawn to the possibility that s

13、ome of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 13341:1997. According to the CEN/CENELEC Internal Regulations, the national standards organization

14、s of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

15、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 13341:2010 has been approved by CEN as a EN ISO 13341:2010 without any modification. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (c) BSIB

16、S EN ISO 13341:2010ISO 13341:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technic

17、al committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely wi

18、th the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Inte

19、rnational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document ma

20、y be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13341 was prepared by Technical Committee ISO/TC 58, Gas cylinders. This second edition cancels and replaces the first edition (ISO 13341:1997), which has been technically revised.

21、 It also incorporates the Technical Corrigendum ISO 13341:1997/Cor.1:1998. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (c) BSIBS EN ISO 13341:2010Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (c) BSIBS EN I

22、SO 13341:2010INTERNATIONAL STANDARD ISO 13341:2010(E) ISO 2010 All rights reserved 1Gas cylinders Fitting of valves to gas cylinders 1 Scope This International Standard specifies the procedures to be followed when connecting cylinder valves to gas cylinders. It specifically applies to all valve and

23、cylinder combinations connected with ISO screw threads as specified in ISO 10920 and ISO 11363-1. It defines routines for inspection and preparation prior to valving for both taper and parallel screw threads. Torque values are given in Annex A for steel and aluminium gas cylinders including composit

24、e cylinders with steel or aluminium boss. NOTE The procedures and practices specified in this International Standard can be beneficially applied to other valve to cylinder screw thread connection systems. ISO/TR 113644lists the valve to gas cylinder threads in use worldwide. It gives details of the

25、thread identification codes, whether the threads are interchangeable with ISO threads and if the taping procedure and torque values specified in this International Standard can be used. ISO/TR 113644gives clear guidance for the method and torque for all listed inlet threads, which are not interchang

26、eable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11114-2, Transp

27、ortable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Non-metallic materials ISO 11119-2, Gas cylinders of composite construction Specification and test methods Part 2: Fully wrapped fibre reinforced composite gas cylinders with load-sharing metal liners ISO 1

28、1119-3, Gas cylinders of composite construction Specification and test methods Part 3: Fully wrapped fibre reinforced composite gas cylinders with non-load-sharing metallic or non-metallic liners ISO 15245-1, Gas cylinders Parallel threads for connection of valves to gas cylinders Part 1: Specificat

29、ion 3 General requirements and recommendations Gas cylinders and valves shall be connected so that when in use the combination is gas tight and the valve cannot be removed inadvertently from the cylinder. The tools used to screw the valve into the gas cylinder shall fit the valve properly and the ga

30、s cylinder shall be secured against rotation during the torquing process. The tools shall not cause damage to either the valve or the cylinder. Minor marks to the valve and the cylinder are acceptable. The cylinder and the valving tool axes shall be aligned. In addition, some composite cylinders nee

31、d special treatment for the valving process, for example fixing the neck/metal boss during torquing. Any special instructions given by the cylinder manufacturer shall be followed. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (c) BSIBS EN ISO 13341:2010I

32、SO 13341:2010(E) 2 ISO 2010 All rights reservedSealing materials used between the valve stem and cylinder neck threads shall be compatible with the gas to be contained in the cylinder (e.g. oxygen), in accordance with ISO 11114-2. Except as described in 7.3, the torque applied to the valve shall be

33、within the relevant range given in Annex A. Valve manufacturers shall make available instructions if their specific recommendations regarding their product differ from those included in this International Standard (e.g. if their maximum torque recommendation is less than the maximum allowed in the r

34、elevant range included in Annex A). For all threads, the maximum level of torque should not be exceeded as this will give rise to a high stress in the valve stem and/or cylinder neck. Care shall be taken with aluminium alloy cylinders, for which valving torques are lower than for steel cylinders. Al

35、uminium alloy cylinders shall not be valved at temperatures above ambient because, on cooling, differential contraction between the cylinder and the valve will give rise to a high stress in the cylinder neck. High difference of temperature between cylinder neck and valve should be avoided. Some valv

36、e designs can be unsuitable to be valved at elevated temperatures (e.g. above 65 C). All tools and equipment used for valving cylinders shall be periodically validated for accuracy. Accuracy shall be established by measuring the torque applied to the valve of a valved cylinder as indicated in 5.4.3

37、for taper threads and in 6.5 for parallel threads. NOTE Some machine tools rely on the friction between the valve and gas cylinder threads to stop the machine turning once the correct torque has been reached. For fast running machines, the inertia to be absorbed before the machine stops can result i

38、n valving torques being in practice far higher than the machine set point. 4 Preparation 4.1 Each valve and cylinder thread shall be examined to ensure that they are to the same dimensional standard, for example ISO 11363-1 or ISO 15245-1. NOTE 1 Equivalent dimensional standards will make up the sub

39、ject of the future ISO/TR 11364. NOTE 2 Some standards require that valve and cylinder threads be identified by marking (e.g. ISO 10297 and ISO 13769). 4.2 The valve and cylinder threads shall be visually inspected for integrity and, where applicable, for damaged O-ring sealing surfaces. In particul

40、ar, when valving aluminium alloy cylinders, the bottom threads on the stem of valves and the lower threads within the cylinder neck shall be fully formed at the root of the thread and free from ragged edges or burrs. Similar care is required when fitting stainless steel valves to all cylinders. Acce

41、ptance criteria for used valves are given in ISO 22434. 4.3 Threads and sealing surface on both valve and cylinder shall be checked for cleanliness. Any remnants of old PTFE sealing tape or other sealants, paints and other contaminants shall be completely removed. Care should be taken to prevent any

42、 debris falling into the cylinder. Depending on the gas service and application, before fitting the valve, it shall be ensured that the internal surface of the cylinder is clean and dry. 4.4 The top face of the cylinder, where a parallel thread is used, shall be free of paint, debris or other contam

43、ination so that the valve flange can rest directly on it when the cylinder has been valved. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/03/2011 03:29, Uncontrolled Copy, (c) BSIBS EN ISO 13341:2010ISO 13341:2010(E) ISO 2010 All rights reserved 35 Valving procedure for taper threaded va

44、lves 5.1 General Thread sealing can be achieved using sealant tape in accordance with 5.2 or soft metal caps in accordance with 5.3. Alternative sealing methods may be used, for example paste (see Annex B) or PTFE caps (in which case refer to the manufacturers instructions). 5.2 Wrapping with sealan

45、t tape 5.2.1 Wrapping of the valve stem with tape shall commence at the small end of the taper; the sealant tape shall be wound clockwise when looking from the base of the valve. 5.2.2 Wrapping shall be such that it protrudes beyond the small end of the valve stem by a maximum of 3 mm and a minimum

46、of 1 mm. At the small end, there shall be a minimum of three layers of tape (see 5.2.5). Tape shall then be overlapped during wrapping to give an even double thickness all the way up to include the top thread of the valve stem. The number of layers may be adjusted depending on thickness of tape. Exc

47、essive tape thickness may increase the stress or push the tape out. 5.2.3 The tape shall not be excessively stretched during wrapping and shall be carefully torn or cut. 5.2.4 Tape shall be carefully worked into the valve thread profile. Adherence between the tape and the valve stem thread form shou

48、ld be established. 5.2.5 Roll back the tape which protrudes beyond the bottom of the valve stem to leave the bottom face of the valve stem clear of tape; this will result in a doubling of the layers of tape covering the first valve stem thread at the small end. The valve shall then be fitted to the

49、cylinder by hand prior to torquing. 5.3 Application of soft metal caps 5.3.1 Soft metal caps containing lead shall not be used with aluminium alloy cylinders. 5.3.2 The soft metal cap used shall be of the correct size. 5.3.3 After the cap is pulled over the valve stem, it shall be carefully worked into the valve thread profile with a suitable tool or a leather glove, to prevent the bottom end of the soft metal cap being cut off when the valve is fitted. 5.3.4 Valves shall be fitted to the cylinder by hand prior to torquing. 5.4 Valve tor