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Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BRITISH STANDARD Gas cylinders Ð High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles The European Standard EN ISO 11439:2000 has the status of a British Standard ICS 23.020.30; 43.060.40; 75.200 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW | BS EN ISO | | | 11439:2000 | | | | Incorporating | | Corrigendum No | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11439:2000 National foreword This British Standard is the official English language version of EN ISO 11439:2000, including corrections March 2001 It is identical with ISO 11439:2000 The UK participation in its preparation was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/3, Transportable gas containers Cylinder design and construction and testing at time of manufacture, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British 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, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages to 73, the annex ZA page, an inside back cover and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 15 November 2001 ISBN 580 36663 Amendments issued since publication Amd No Date Comments 13215 15 November 2001 Correction of annex ZA (normative) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN ISO 11439 NORME EUROPÉENNE EUROPÄISCHE NORM September 2000 ICS 43.060.40 Corrected March 2001 English version Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles (ISO 11439:2000) Bouteilles gaz - Bouteilles haute pression pour le stockage de gaz naturel utilisé comme carburant bord des véhicules automobiles (ISO 11439:2000) Gasflaschen - Gasflaschen zur Mitführung von verdichtetem Erdgas als Treibstoff für Kraftfahrzeuge (ISO 11439:2000) This European Standard was approved by CEN on 15 September 2000 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 standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the 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 Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 © 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members B-1050 Brussels Ref No EN ISO 11439:2000 E Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 Foreword The text of the International Standard ISO 11439:2000 has been prepared by Technical Committee ISO/TC 58 "Gas cylinders" in collaboration with 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 March 2001, and conflicting national standards shall be withdrawn at the latest by March 2001 According to the CEN/CENELEC Internal Regulations, the national standards organizations 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 Endorsement notice The text of the International Standard ISO 11439:2000 was approved by CEN as a European Standard without any modification NOTE: Normative references to International Standards are listed in annex ZA (normative) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0002:93411 OSI NE INTERNATIONAL STANDARD ISO 11439 Firs t edi tion 2000-09-15 Gas cylinders — High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles Bouteilles gaz — Bouteilles haute pression pour le stockage de gaz naturel utilisé comme carburant bord des véhicules automobiles ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Reference number ISO 11439:2000(E) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ ii Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 Contents Page Foreword iv Introduction v Scope Normative references Terms and definitions Service conditions 5 Approval and certification Requirements for type CNG-1 metal cylinders 10 Requirements for type CNG-2 hoop-wrapped cylinders 17 Requirements for type CNG-3 fully-wrapped cylinders 27 Requirements for type CNG-4 all-composite cylinders 37 10 Marking 46 11 Preparation for dispatch .47 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Annex A (normative) Test methods and criteria 48 Annex B (normative) Ultrasonic inspection 56 Annex C (informative) Approval and certification procedures 60 Annex D (informative) NDE defect size by flawed cylinder cycling .62 Annex E (informative) Report forms 63 Annex F (informative) Environmental test 66 Annex G (informative) Verification of stress ratios using strain gauges 71 Annex H (informative) Manufacturer’s instructions for handling, use and inspection of cylinders 72 iii Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 Foreword 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 technical 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 with 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 Draft International 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 International Standard may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights International Standard ISO 11439 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder design Annexes A and B form a normative part of this International Standard Annexes C to H are for information only ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ iv Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 Introduction Cylinders for the on-board storage of fuel for natural gas vehicle service are required to be light-weight, at the same time maintaining or improving on the level of safety currently existing for other pressure vessels These requirements are achieved by: a) specifying service conditions precisely and comprehensively as a firm basis for both cylinder design and use; b) using an appropriate method to assess cyclic pressure fatigue life and to establish allowable defect sizes in metal cylinders or liners; c) requiring design qualification tests; d) requiring non-destructive testing and inspection of all production cylinders; e) requiring destructive tests on cylinders and cylinder material taken from each batch of cylinders produced; f) requiring manufacturers to have a comprehensive quality system documented and implemented; g) requiring periodic re-inspection and, if necessary, retesting in accordance with the manufacturer’s instructions; h) requiring manufacturers to specify as part of their design, the safe service life of their cylinders ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Cylinder designs that meet the requirements of this International Standard: a) will have a fatigue life which exceeds the specified service life; b) when pressure cycled to failure, will leak but not rupture; c) when subject to hydrostatic burst tests, will have factors of “stress at burst pressure” over “stress at working pressure” that exceed the values specified for the type of design and the materials used Owners or users of cylinders designed to this International Standard should note that the cylinders are designed to operate safely if used in accordance with specified service conditions for a specified finite service life only The expiry date is marked on each cylinder and it is the responsibility of owners and users to ensure that cylinders are not used after that date, and that they are inspected in accordance with the manufacturer’s instructions v Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Nov 23 10:07:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11439:2000 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ