BS EN ISO 22434-2011 Transportable gas cylinders Inspection and maintenance of cylinder valves《可运输气瓶 气瓶阀检查和维护》.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 valvesLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSINa

2、tional forewordThis British Standard is the UK implementation of EN ISO 22434:2011. It is identical to ISO 22434:2006. It supersedes BS ISO 22434:2006, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PVE/3/1, Valve fittings for gas containers.A list of

3、 organizations represented on this committee can be obtained on 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 obl

4、igations.BS EN ISO 22434:2011This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2009 BSI 2011Amendments/corrigenda issued since publicationDate Comments 30 June 2011 This corrigendum renumbers BS ISO 22434:2006 as BS EN ISO 22434:201

5、1ISBN 978 0 580 72590 6Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22434 March 2011 ICS 23.020.30; 23.060.01 English Version Transportable gas cylinders - Inspection and maintenance of cyl

6、inder valves (ISO 22434:2006) Bouteilles 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 membe

7、rs are bound to comply with the CEN/CENELEC 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 applicatio

8、n to the CEN-CENELEC Management Centre or 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 Manageme

9、nt Centre has the same status as the official 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, Netherland

10、s, Norway, Poland, Portugal, Romania, Slovakia, 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 an

11、y form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22434:2011: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSI ISO 20 iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2

12、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 22434:2011EN ISO 22434:2011 (E)11Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSIiv ISO 2011Foreword The text

13、 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 cylinders” the secretariat of which is held by BSI. This

14、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. Attention is drawn to the possibility that some of

15、 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 Regulations, the national standards organizations of the following countries are bound to implemen

16、t 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switze

17、rland 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. BS EN ISO 22434:2011EN ISO 22434:2011 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSIThis page

18、deliberately set blankLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSIINTERNATIONAL STANDARD ISO 20 1Transportable gas cylinders Inspection and maintenance of cylinder valves 1 Scope This International Standard specifies the requirements for the ins

19、pection and maintenance of cylinder valves, including valves with integrated pressure regulators (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

20、change of gas service (see ISO 11621). It does not apply to routine inspection of cylinder valves 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 indispensa

21、ble 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 6406:2005, Gas cylinders Seamless steel gas cylinders Periodic inspection and testing ISO 1015

22、6, Gases and gas mixtures Determination of fire potential and oxidizing ability for the selection 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 cyli

23、nders Refillable welded steel cylinders for Liquified Petroleum Gas (LPG) Procedures for checking 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 Inspectio

24、n at time of filling ISO 11755, Gas cylinders Cylinder bundles for compressed and liquefied gases (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 S

25、elf-closing ISO 14246, Transportable gas cylinders Gas cylinder valves Manufacturing tests and inspection 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 C

26、ylinder valves with integrated pressure regulator Specification and type testing BS EN ISO 22434:2011EN ISO 22434:2011 (E)11Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSI2 ISO 20113 Terms and definitions For the purposes of this document, the foll

27、owing 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 parts, such that the main pressure barrier of the valve is breached 3.3 removal disconnection of the cylind

28、er 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 repair operation including cleaning, and replacement of non-pressure-retaining components, e.g. handwheel, o

29、utlet 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 boundary, but do not require dismantling of the cylinder valve, e.g. pressure relief device (PRD), pressure ga

30、uges, 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 requirements 4.1 Occurrence If a cylinder valve is deemed to require maintenance at any time, e.g. at tim

31、e 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 cylinders by competent personnel only. 4.3 Safety concerns Prior to removing the cylinder valve from a g

32、as 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 safely from cylinders under pressure. BS EN ISO 22434:2011EN ISO 22434:2011 (E)Licensed Copy: Wang Bin,

33、 ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSI 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 performed

34、 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 compris

35、es 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) If an

36、y 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 in the

37、 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, corrode

38、d 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 wrenc

39、hing 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 suspect imp

40、roper lubrication or sealant at the valve to cylinder interface; p) loose gland nuts. BS EN ISO 22434:2011EN ISO 22434:2011 (E)11Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSI4 ISO 20115.1.3 Additional external examination Valve removed from gas c

41、ylinder In addition to the above requirements, if the cylinder valve has been removed from the 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 corro

42、sion products in the valve stem bore; b) cross-threaded, damaged, worn, deformed or stripped valve 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 e

43、xcess flow prevention device. 5.1.4 Acceptance criteria Cylinder valves not exhibiting defects 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

44、 with Clause 9. 5.2 Maintenance 5.2.1 Minor repairs Hand wheels and other non-pressure retaining 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 proc

45、edures. For cylinder valves equipped with pressure relief devices (PRD), if the PRD is to be replaced, 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 manufactu

46、rers specification and are to be replaced according to their instructions. 5.2.3 Refurbishment 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 pa

47、rts are used, they shall be in accordance with the cylinder valve manufacturers specification 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 activi

48、ty. BS EN ISO 22434:2011EN ISO 22434:2011 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2011 07:51, Uncontrolled Copy, (c) BSI ISO 20 55.2.3.2 Component examination and evaluation The stem thread of each valve body shall be visually examined to assess whether it has been subjected

49、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 passageways 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 valve allows, any of th