EN ISO 22434-2011 en Transportable gas cylinders - Inspection and maintenance of cylinder valves《可运输气瓶 气瓶阀的检验和维护》.pdf

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1、BS EN ISO22434:2011ICS 23.020.30; 23.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDTransportable gascylinders Inspectionand maintenance ofcylinder valvesIncorporatingcorrigendumNovember 2011 National forewordThis British Standard is the UK implementation

2、 of EN ISO 22434:2011. It is identical to ISO 22434:2006. It supersedes BS EN 14189:2003, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PVE/3/1, Valve fittings for gas containers.A list of organizations represented on this committee can be obtained o

3、n request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN ISO 22434:2011 This British Standardwas publish

4、ed under theauthority of the StandardsPolicy and StrategyCommittee on 28 February2009 BSI 2011ISBN 978 0 580 76295 6Amendments/corrigenda issued since publicationDate Comments30 June 2011 This corrigendum renumbers BS ISO 22434:2006 asBS EN ISO 22434:201130 November 2011 Implementation of CEN Correc

5、tion Notice March 2011: Changed supersession information.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22434 March 2011 ICS 23.020.30; 23.060.01 Supersedes EN 14189:2003English Version Transportable gas cylinders - Inspection and maintenance of cylinder valves (ISO 22434:2006) Bouteilles

6、gaz transportables - Contrle et maintenance des robinets de bouteilles (ISO 22434:2006) Ortsbewegliche Gasflaschen - Inspektion und Instandhaltung von Gasflaschenventilen (ISO 22434:2006)This European Standard was approved by CEN on 31 January 2011. CEN members are bound to comply with the CEN/CENEL

7、EC Internal Regulations which stipulate the conditions for 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 CEN-CENELEC Management Centre or

8、 to any CEN member. This European Standard exists in three official 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 CEN-CENELEC Management Centre has the same status as the offi

9、cial versions. CEN members are the national standards bodies of 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, Romania, Slo

10、vakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwid

11、e for CEN national Members. Ref. No. EN ISO 22434:2011: E ISO 20 iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 General requirements. 2 5 Inspection and maintenance . 3 6 Testing . 5 7 Marking 5 8 Packaging 6 9 Scrapping 6 Bibliography . 7 BS EN ISO

12、22434:2011EN ISO 22434:2011 (E)11Foreword The text of ISO 22434:2006 has been prepared by Technical Committee ISO/TC 58 “Gas cylinders” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 22434:2011 by Technical Committee CEN/TC 23 “Transportable gas cylinde

13、rs” 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 September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011.

14、This document supersedes EN 14189:2003. Attention is drawn to the possibility that some 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. According to the CEN/CENELEC Internal Regulati

15、ons, the national standards organizations 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,

16、 Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 22434:2006 has been approved by CEN as a EN ISO 22434:2011 without any modification. ISO 20iv 11BS EN ISO 22434:2011EN ISO 22434:2011 (E)This pag

17、e deliberately set blankINTERNATIONAL STANDARD ISO 20 1Transportable gas cylinders Inspection and maintenance of cylinder valves 1 Scope This International Standard specifies the requirements for the inspection and maintenance of cylinder valves, including valves with integrated pressure regulators

18、(VIPR) (see ISO 22435). This International Standard may be applied to cylinder valves at the time of the periodic inspection of gas cylinders, bundles, drums and trailers, and at any other time, e.g. at change of gas service (see ISO 11621). It does not apply to routine inspection of cylinder valves

19、 carried out at the time of cylinder filling. NOTE National standards and regulations may apply to maintenance of cylinder valves. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F

20、or undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6406:2005, Gas cylinders Seamless steel gas cylinders Periodic inspection and testing ISO 10156, Gases and gas mixtures Determination of fire potential and oxidizing ability for the selection

21、 of cylinder valve outlets ISO 10297, Transportable gas cylinders Cylinder valves Specification and type testing ISO 10463, Cylinders for permanent gases Inspection at time of filling ISO 10691, Gas cylinders Refillable welded steel cylinders for Liquified Petroleum Gas (LPG) Procedures for checking

22、 before, during and after filling ISO 11113, Cylinders for liquefied gases (excluding acetylene and LPG) Inspection at time of filling ISO 11372, Gas cylinders Cylinders for dissolved acetylene Inspection at time of filling ISO 11755, Gas cylinders Cylinder bundles for compressed and liquefied gases

23、 (excluding acetylene) Inspection at time of filling ISO 13341, Transportable gas cylinders Fitting of valves to gas cylinders ISO 14245, Gas cylinders Specifications and testing of LPG cylinder valves Self-closing ISO 14246, Transportable gas cylinders Gas cylinder valves Manufacturing tests and in

24、spection ISO 15001, Anaesthetic and respiratory equipment Compatibility with oxygen ISO 15995, Gas cylinders Specifications and testing of LPG cylinder valves Manually operated ISO 22435, Gas cylinders Cylinder valves with integrated pressure regulator Specification and type testing BS EN ISO 22434:

25、2011EN ISO 22434:2011 (E)112 ISO 20113 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 inspection procedure to determine if a cylinder valve is suitable for further service 3.2 dismantling separation of the cylinder valve into its component par

26、ts, such that the main pressure barrier of the valve is breached 3.3 removal disconnection of the cylinder valve from the gas cylinder 3.4 maintenance operations required to keep the cylinder valve in working condition NOTE This covers minor repairs, major repairs and refurbishment. 3.4.1 minor repa

27、ir operation including cleaning, and replacement of non-pressure-retaining components, e.g. handwheel, outlet flow restrictor, residual pressure device fitted in the valve outlet 3.4.2 major repair operation including replacement of valve accessories which are incorporated within the pressure bounda

28、ry, but do not require dismantling of the cylinder valve, e.g. pressure relief device (PRD), pressure gauges, flowmeter 3.4.3 refurbishment operation involving dismantling of the cylinder valve, evaluation of its internal components, and reassembly to make it suitable for further service 4 General r

29、equirements 4.1 Occurrence If a cylinder valve is deemed to require maintenance at any time, e.g. at time of periodic test of the gas cylinder, it shall either be scrapped, or be subject to the procedures given below. 4.2 Personnel Cylinder valves shall be inspected, maintained and removed from gas

30、cylinders by competent personnel only. 4.3 Safety concerns Prior to removing the cylinder valve from a gas cylinder it shall be verified that no pressure remains in the cylinder. See ISO 6406:2005, Annex D. NOTE Special techniques and equipment exist in some industries, e.g. LPG, for removing valves

31、 safely from cylinders under pressure. BS EN ISO 22434:2011EN ISO 22434:2011 (E) ISO 20 3Inspection and minor repairs may be carried out on cylinder valves while they are connected to a pressurized gas cylinder, but this requires special procedures. Major repairs and refurbishment shall only be perf

32、ormed on a cylinder valve in a de-pressurized cylinder or on a removed valve. 5 Inspection and maintenance Inspection will determine if a cylinder valve is suitable for continued service or if maintenance is required, and the level of that maintenance. 5.1 Inspection Inspection of cylinder valves co

33、mprises external examination preceded by cleaning, where necessary. 5.1.1 Cleaning The cylinder valve shall be clean externally to facilitate inspection. a) Contamination, foreign bodies and corrosion products shall be removed from the valve outlet taking care not to damage any sealing surfaces. b)

34、If any cleaning media are used, they are to be suitable for the intended gas service (e.g. medical), the materials of construction of the cylinder valve, the gas cylinder and the associated downstream equipment. Cleaning media shall be completely removed. 5.1.2 External examination valve remaining i

35、n the gas cylinder Cylinder valves shall be examined for defects including the following: a) the spindle does not move smoothly or is difficult to turn; b) bent, deformed, corroded, badly marked and scored bodies or those with cracks; c) bent or damaged spindles; d) cross-threaded, damaged, worn, co

36、rroded or stripped valve outlet and filling connections; e) damaged, corroded or worn outlet sealing surfaces and/or any non-metallic sealing element; f) any indication of having been subjected to excessive heat or having been in a fire; g) foreign matter obstructing or blocking ports; h) distorted

37、wrenching flats on key operated valves; i) evidence of abuse or tampering; j) evidence of damaged gauges; k) damage to handwheels; l) missing or damaged residual pressure valve unit; m) incorrect rating of pressure relief device; n) inappropriate valve for the gas service; o) contamination or suspec

38、t improper lubrication or sealant at the valve to cylinder interface; p) loose gland nuts. BS EN ISO 22434:2011EN ISO 22434:2011 (E)114 ISO 20115.1.3 Additional external examination Valve removed from gas cylinder In addition to the above requirements, if the cylinder valve has been removed from the

39、 gas cylinder, it shall be visually examined for the following additional defects after all residual jointing compound has been removed from the valve stem thread: a) contamination, foreign bodies and corrosion products in the valve stem bore; b) cross-threaded, damaged, worn, deformed or stripped v

40、alve stem threads; c) damaged dip tube, eductor tube or retaining threads; d) damaged inlet filter; e) damaged liquid or pressure level indicating device; f) damaged overfill prevention device; g) damaged excess flow prevention device. 5.1.4 Acceptance criteria Cylinder valves not exhibiting defects

41、 listed in 5.1.2 (and 5.1.3 if applicable) may re-enter service. Cylinder valves with any of the defects listed above shall either be subject to maintenance in accordance with 5.2, or scrapped in accordance with Clause 9. 5.2 Maintenance 5.2.1 Minor repairs Hand wheels and other non-pressure retaini

42、ng parts shall be assessed for reuse, repair or replacement as appropriate. 5.2.2 Major repairs If required, gland nuts shall be re-torqued to the original manufacturing value and using the recommended procedures. For cylinder valves equipped with pressure relief devices (PRD), if the PRD is to be r

43、eplaced, it shall be replaced by items to the manufacturers original specification and in accordance with their instructions. Other accessories requiring replacement are to meet the original valve manufacturers specification and are to be replaced according to their instructions. 5.2.3 Refurbishment

44、 5.2.3.1 General Cylinder valves may only be refurbished if they are designed to be dismantled and reassembled. Refurbishment shall be carried out after decontamination, as appropriate. Where replacement parts are used, they shall be in accordance with the cylinder valve manufacturers specification

45、for the intended gas service. Cylinder valves shall be dismantled in accordance with the original manufacturers specifications, using appropriate tools and in a work area specially set aside for this activity. BS EN ISO 22434:2011EN ISO 22434:2011 (E) ISO 20 55.2.3.2 Component examination and evalua

46、tion The stem thread of each valve body shall be visually examined to assess whether it has been subjected to excessive damage, deformation or wear. The outlet connection(s) of each valve body shall be visually examined to confirm freedom from corrosion, damage, or excessive wear. Internal passagewa

47、ys shall be examined to ensure that they are free of foreign matter. The valve outlet sealing face shall be examined for damage, wear and corrosion. Any outlet non-metallic sealing element shall be replaced by a new one in accordance with the valve manufacturers specification. If the design of the v

48、alve allows, any of the above defects may be corrected, provided the dimensions remain within the original design standard, otherwise the cylinder valve shall be scrapped in accordance with Clause 9. All internal component parts of the cylinder valve shall be visually inspected to assess suitability

49、 for re-use (absence of excessive wear, damage or contamination). All non-metallic sealing materials shall be examined as to their suitability for further service and replaced as necessary in accordance with the manufacturers recommendations. Cylinder valves or components that are unsuitable for further service shall be scrapped in accordance with Clause 9. All re-used components of the valve shall be clean to the original manufacturers specification. WARNING Cylinder valves intended for oxygen service or ot