1、May 2011 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.
2、020.30; 23.060.40!$ph“1776958www.din.deDDIN EN ISO 22434Transportable gas cylinders Inspection and maintenance of cylinder valves (ISO 22434:2006)English translation of DIN EN ISO 22434:2011-05Ortsbewegliche Gasflaschen Inspektion und Instandhaltung von Gasflaschenventilen (ISO 22434:2006)Englische
3、bersetzung von DIN EN ISO 22434:2011-05Bouteilles gaz transportables Contrle et maintenance des robinets de bouteilles (ISO 22434:2006)Traduction anglaise de DIN EN ISO 22434:2011-05SupersedesDIN EN 14189:2003-09www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall
4、 be considered authoritative.1404.11 DIN EN ISO 22434:2011-05 A comma is used as the decimal marker. National foreword This document has been prepared by Technical Committee ISO/TC 58 “Gas cylinders” in collaboration with Technical Committee CEN/TC 23 “Transportable gas cylinders” (Secretariat: BSI,
5、 United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Druckgasanlagen (Pressurized Gas Installations Standards Committee), Working Committee NA 016-00-03 AA Druckgasflaschen und Ausrstung. Amendments This standard differs from DIN EN 14189:2003-09 as follo
6、ws: a) normative references have been updated (reference to ISO Standards instead of EN Standards); b) the standard has been brought in line with the current rules of presentation. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 10156 D
7、IN EN ISO 10156 ISO 10297 DIN EN ISO 10297 ISO 11372 DIN EN ISO 11372 (draft) ISO 13341 DIN EN ISO 13341 ISO 14245 DIN EN ISO 14245 ISO 14246 DIN EN ISO 14246 ISO 15001 DIN EN ISO 15001 ISO 15995 DIN EN ISO 15995 ISO 22435 DIN EN ISO 22435 Previous editions DIN EN 14189: 2003-09 2 DIN EN ISO 22434:2
8、011-05 National Annex NA (informative) Bibliography DIN EN ISO 10156, Gases and gas mixtures Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets DIN EN ISO 10297, Transportable gas cylinders Cylinder valves Specification and type testing DIN EN ISO 11372
9、, Gas cylinders Acetylene cylinders Filling conditions and filling inspection DIN EN ISO 13341, Gas cylinders Fitting of valves to gas cylinders DIN EN ISO 14245, Gas cylinders Specifications and testing of LPG cylinder valves Self-closing DIN EN ISO 14246, Transportable gas cylinders Gas cylinder v
10、alves Manufacturing tests and inspections DIN EN ISO 15001, Anaesthetic and respiratory equipment Compatibility with oxygen DIN EN ISO 15995, Gas cylinders Specifications and testing of LPG cylinder valves Manually operated DIN EN ISO 22435, Gas cylinders Cylinder valves with integrated pressure reg
11、ulators Specification and type testing 3 DIN EN ISO 22434:2011-05 4 This page is intentionally blank EUROPEAN 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 cylinder valves (ISO 22434
12、: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 members are bound to comply with
13、 the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN-CENELEC Manageme
14、nt 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 Management Centre has the same status
15、 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, Netherlands, Norway, Poland,Portugal, R
16、omania, 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 any form and by any means reserv
17、ed worldwide for CEN national Members. Ref. No. EN ISO 22434:2011: EContents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions. 5 4 General requirements. 5 5 Inspection and maintenance . 6 6 Testing . 8 7 Marking 8 8 Packaging 9 9 Scrapping 9 Bibliography . 10 EN ISO 22
18、434:2011 (E) DIN EN ISO 22434:2011-05 2Foreword 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 c
19、ylinders” 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
20、2011. 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 Re
21、gulations, 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,
22、Malta, 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. EN ISO 22434:2011 (E) DIN EN ISO 22434:2011-05 31 Scop
23、e This International Standard specifies the requirements for the inspection 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 cyl
24、inders, 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 carried out at the time of cylinder filling. NOTE National standards and regulations may apply to maintenance of cylinder valves. 2 No
25、rmative 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 6406:2005, Gas cylinders S
26、eamless steel gas cylinders Periodic inspection and testing ISO 10156, 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
27、for permanent gases Inspection at time of filling ISO 10691, Gas cylinders 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 fillin
28、g ISO 11372, Gas cylinders Cylinders for dissolved acetylene Inspection 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 14
29、245, Gas cylinders Specifications and testing of LPG cylinder valves Self-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 testi
30、ng of LPG cylinder valves Manually operated ISO 22435, Gas cylinders Cylinder valves with integrated pressure regulator Specification and type testing EN ISO 22434:2011 (E) DIN EN ISO 22434:2011-05 4N1)National footnote: ISO 10463, withdrawn and replaced by ISO 24431 N2)National footnote: ISO 11113,
31、 withdrawn and replaced by ISO 24431 N1)N2)3 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 compone
32、nt parts, 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 mino
33、r repair 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
34、boundary, 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 Gen
35、eral requirements 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 fro
36、m gas 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
37、valves safely from cylinders under pressure. EN ISO 22434:2011 (E) DIN EN ISO 22434:2011-05 5Inspection 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
38、performed 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 valve
39、s comprises 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.
40、 b) 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 remaini
41、ng in 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
42、, corroded 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) distor
43、ted 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 su
44、spect improper lubrication or sealant at the valve to cylinder interface; p) loose gland nuts. EN ISO 22434:2011 (E) DIN EN ISO 22434:2011-05 65.1.3 Additional external examination Valve removed from gas cylinder In addition to the above requirements, if the cylinder valve has been removed from the
45、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 va
46、lve 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
47、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 retainin
48、g 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 replaced, it shall be replaced by items to the manufacturers original specification and in accordance with their instructions. Other accessories requiring rep
