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1、BRITISH STANDARD BS EN 849:1997 Incorporating Amendments Nos. 1 and 2 Transportable gas cylinders Cylinder valves Specification and type testing The European Standard EN 849:1996, with the incorporation of amendments A1:1999 and A2:2001, has the status of a British Standard ICS 23.060.40 NO COPYING
2、WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 849:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under t
3、he authority of the Standards Board and comes into effect on 15 March 1997 BSI 14 January 2002 The following BSI references relate to the work on this standard: Committee reference PVE/3 Draft for comment 92/812941 X ISBN 0 580 26783 0 Committees responsible for this British Standard The preparation
4、 of this British Standard was entrusted to Technical Committee PVE/3, Gas containers, upon which the following bodies were represented: Aluminium Extruders Association Aluminium Federation British Compressed Gases Association British Fire Consortium British Gas plc British Iron and Steel Producers A
5、ssociation British Soft Drinks Association Ltd. Engineering Equipment and Materials Users Association Fire Extinguishing Trades Association Health and Safety Executive Home Office Institution of Chemical Engineers LP Gas Association Marine Safety Agency Ministry of Defence National Engineering Labor
6、atory National Physical Laboratory Safety Assessment Federation Ltd. Safety Equipment Association Tube Investments Chesterfield Tube Co. Ltd. Tubes Investments Limited The following bodies were also represented in the drafting of the standard, through sub-committees and panels: British Association o
7、f Breathing Apparatus Service Engineers Department of Health Amendments issued since publication Amd. No. DateComments 10588November 1999 Addition of new Annex C 1334514 January 2002 Indicated by a sideline Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled
8、Copy, (c) BSI BS EN 849:1997 BSI 14 January 2002 i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 8493 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 849:1997 ii BSI 14 January 2002 Nat
9、ional foreword This British Standard has been prepared by Technical Committee PVE/3 and is the English language version of EN 849:1996 Transportable gas cylinders Cylinder valves Specification and type testing, including amendments A1:1999 and A2:2001, published by the European Committee for Standar
10、dization (CEN). EN 849 was produced as a result of international discussions in which the United Kingdom took an active part. This British Standard partially supersedes BS 341-1:1962, BS 341-1:1991 and BS 341-2:1963 which will be amended to elimate conflicting requirements. Cross-references The Brit
11、ish Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. The Tech
12、nical Committee has reviewed the provisions of ISO 5145:1990 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of Briti
13、sh Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 24, an inside back co
14、ver and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
15、 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 849 July 1996 + A1 April 1999 + A2 June 2001 ICS 23.060.00 Descriptors: Gas cylinders, compressed gases, liquified gases, dissolved gases, gas valves, design, performance evaluation, conformity tests, marking English version Transportable gas cyl
16、inders Cylinder valves Specification and type testing (includes amendments A1:1999 and A2:2001) Bouteilles gaz transportables Robinets de bouteilles Spcifications et essais de type (inclut les amendements A1:1999 et A2:2001) Ortsbewegliche Gasflaschen Flaschen-Ventile Spezifikation und Typprfung (en
17、hlt nderungen A1:1999 und A2:2001) This European Standard was approved by CEN on 1996-01-22; amendment A1 was approved by CEN on 1999-01-08. Amendment A2:2001 was approved by CEN on 2001-05-10. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
18、or giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three officia
19、l versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Bel
20、gium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Sta
21、ssart 36, B-1050 Brussels 1996 Copyright reserved to CEN members. Ref. No. EN 849:1996 + A1:1999 + A2:2001 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 849:1996 BSI 14 January 20022 Foreword This European Standard has been prepared b
22、y Technical Committee CEN/TC 23, Transportable gas cylinders, the Secretariat of which is held 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 January 1997, and conflicting national standa
23、rds shall be withdrawn at the latest by January 1997. This European Standard has been submitted for reference into the RID and/or the technical annexes of the ADR. Therefore in this context the standards listed in the normative references and covering basic requirements of the RID/ADR not addressed
24、within the present standard are normative only when the standards themselves are referred to in the RID and/or the technical annexes of the ADR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
25、ndard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This amendment EN 849:1996/A1:1999 to EN 849:1996 has been prepared by Technical Committ
26、ee CEN/TC 23, Transportable gas cylinders, the Secretariat of which is held by BSI. This amendment to the European Standard EN 849:1996 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1999, and conflicting natio
27、nal standards shall be withdrawn at the latest by October 1999. This amendment to EN 849 has been prepared to clarify certain important parameters and aspects of testing cyclinder valves in accordance with EN 849, 5.4.4. According to the CEN/CENELEC Internal Regulations, the national standards organ
28、izations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standar
29、d has been submitted for reference into the RID and/or the technical annexes of the ADR. Therefore in this context the standards listed in the normative references and covering basic requirements of the RID/ADR not addressed within the present standard are normative only when the standards themselve
30、s are referred to in the RID and/or the technical annexes of the ADR. Foreword to amendment A2 This amendment EN 849:1996/A2:2001 to EN 849:1996 has been prepared by Technical Committee CEN/TC 23, Transportable gas cylinders, the Secretariat of which is held by BSI. This amendment to the European St
31、andard EN 849:1996 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by December 2001. This amendment to EN 849 has been prepared to align
32、 certain requirements with RID/ADR. This European Standard has been submitted for reference into the RID and/or the technical annexes of the ADR. Therefore in this context the standards listed in the normative references and covering basic requirements of the RID/ADR not addressed within the present
33、 standard are normative only when the standards themselves are referred to in the RID and/or the technical annexes of the ADR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
34、lgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 849:1
35、996 BSI 14 January 2002 3 Contents Page Foreword2 Introduction3 1Scope4 2Normative references4 3Definitions and symbols4 4Valve requirements5 5Prototype valve test9 6Marking18 7Test report18 Annex A (normative) Valve impact test19 Annex B (informative) Example of test sequence21 Annex C (normative)
36、Endurance test22 Figure 1 External tightness6 Figure 2 Internal tightness7 Figure 3 Maximum dimensions for gas cylinder valves, protected by a cap8 Figure 4 Example of an ignition test installation15 Figure 5 Pressure cycle specification16 Figure 6 Example of acetylene flashback test apparatus17 Fig
37、ure A.1 Impact test20 Figure C.1 Typical arrangement of computer controlled equipment23 Figure C.2 Diagram showing a typical cycle for endurance test24 Table 1 Sequence of tests (tightness, endurance and fire resistance) for type approval (no variants)11 Table 2 Test pressures for tightness tests12
38、Table 3 Test sequence14 Deleted Table B.1 Sequence of tests for type approval (basic design plus two type variants)21 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 849:1996 4 BSI 14 January 2002 Introduction The increased use of compres
39、sed gases has led to a corresponding increase in the number of gas cylinders that are in circulation throughout the world. Each gas cylinder is fitted with a valve, to contain and control the discharge of its contents. Such valves normally conform to standards of performance and safety. 1 Scope This
40、 European Standard specifies requirements for gas cylinder valves and the method of testing such valves, for type approval. This standard is applicable to valves to be fitted to gas cylinders, up to 150 l water capacity, intended to convey compressed, liquefied or dissolved gases. This standard is o
41、nly applicable to valves operated by a hand wheel or a key. This standard is not applicable to valves for breathing equipment, fire extinguishers or cryogenic equipment. This standard is primarily for industrial gases other than LPG but may also be applied for LPG. However for dedicated LPG cylinder
42、s, see prEN 13153:1998, Specification and testing for Liquefied Petroleum Gases (LPG) Cylinder valves Manually operated, prepared by CEN/TC 286, Liquefied petroleum gas equipment and accessories. 2 Normative references This European Standard incorporates by dated or undated reference, provisions fro
43、m other publications. These normative references are cited at the appropriate place in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendmen
44、t or revision. For undated references the latest edition of the publication referred to applies. EN 629-1, Transportable gas cylinders 25E taper thread for connection of valves to gas cylinders Part 1: Specification. EN 720-2, Transportable gas cylinders Gases and gas mixtures Part 2: Determination
45、of flammability and oxidizing ability of gases and gas mixtures. EN 962, Transportable gas cylinders Valve protection caps and valve guards for industrial and medical gas cylinders Design, construction and tests. ISO 188, Rubber, vulcanized Accelerated ageing or heat-resistance tests. ISO 1817, Rubb
46、er, vulcanized Determination of the effect of liquids. ISO 5145:1990, Cylinder valve outlets for gases and gas mixtures Selection and dimensioning. 3 Definitions and symbols For the purposes of this standard, the following definitions and symbols apply. 3.1 working pressure (pw) settled pressure, at
47、 a uniform temperature of 15 C, for a full gas cylinder 3.2 operating pressure (po) varying pressure which is developed in a cylinder during service 3.3 valve test pressure (pvt) for compressed gases: pvt = 1,2 pw for liquefied gases and dissolved gases under pressure (for example, acetylene): pvt s
48、hall be at least equal to the minimum test pressure of the cylinder quoted in the relevant transport regulation for that gas or gas group Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:46:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 849:1996 BSI 14 January 2002 5 3.4 external tightnes
49、s tightness to atmosphere (leakage in and/or leakage out) when the valve is open (see Figure 1) 3.5 internal tightness tightness across the valve seat (leakage in and/or leakage out) when the valve is closed (see Figure 2) 3.6 minimum closing torque (Tc) minimum closing torque necessary to obtain the internal tightness 3.7 resistance torque maximum closing torque the valve can withstand without damage 3.8 valve operating mechanism manually rotated device, which closes and opens the valv