ISO INTERNATIONAL STANDARD 19078 Second edition 2013-01-15 Gas cylinders Inspection of the cylinder installation, and requalification of high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles Bouteilles a gaz - Inspection de I'installation des bouteilles, et requalification des bouteilles haute pression pour le stockage du gaz naturel, utilisé comme carburant, a bord des vehicules automobiles Reference number IS0 19078:2013(E) ISO @ IS0 2013 IS0 19078:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either Iso at the address below or ISo's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax+41227490947 E-mail [email protected] Web www.iso.org Published in Switzerland i @ IS0 2013 - All rights reserved IS0 19078:2013(E) Contents Page Foreword .iv Introduction ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions .1 4 Background information. .4 4.1 General .4 4.2 Cylinder types and descriptions 4 4.3 Required marking information .5 5 Inspection body and inspectors. .5 6 Inspection equipment 6 7 Cylinder, valve and pressure relief device inspection. .6 7.1 Inspection interval. 6 7.2 Conditions requiring immediate inspection .6 7.3 Preparationforinspection 7 7.4 Cylinder inspection. 8 7.5 Additional inspection of metal cylinders - CNG-1 and metallic areas of CNG-2, CNG-3 and the metal bosses of CNG-4 13 7.6 Additional inspection requirements for composite cylinders (CNG-2, CNG-3 and CNG-4)15 7.7 Valve and pressure relief device inspection 16 7.8 Cylinder marking.. 17 7.9 Cylinder inspection record/checklist 18 7.10 Cylinder final acceptance/rejection. 18 7.11 Component final acceptance/rejection 19 8 Installation and mounting inspection 20 8.1 Installation and mounting of Natural Gas Vehicle fuel cylinders 20 8.2 Cylinder installation inspection. .20 9 Condemned cylinders 22 9.1 General 22 9.2 Condemned cylinders 22 9.3 Destruction process. 22 Annex A (informative) Depressurization and purging of CNG fuel cylinders. .24 Annex B (informative) Conditions and usage that may warrant more frequent inspections .26 Annex C (informative) Inspection checklist example .27 AnnexD(informative)Considerationsforhvdrostatictestandinternalinspection .29 Bibliography .31 @ IS0 2013 - All rights reserved ii