ISO INTERNATIONAL STANDARD 13770 First edition 1997-12-15 Aluminium alloy gas cylinders - Operational requirements for avoidance of neck and shoulder cracks Bouteilles a gaz en alliage daluminium -Exigences operationnelles pour éviter les fissures du goulot et de Iogive This material is reproduced from Iso documents under International Organization for Standardization (IsO) Copyright License number IHS/ICC/1996. Not for resale. No part of these ISO documents may be reproduced in any form, electronic retrieval system or otherwise, except as aliowed in the copyright law of the country of use, or with the prior written consent of ISo (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), Hs or the iso Licensor's members. TSO Reference number ISO 13770:1997(E) No reproduction or networking permitted without license from IHS Not for Resale ISO13770:1997(E) 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO 13770 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational requirements forgas cylinders. @1SO1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56:CH-1211Geneve 20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland al Organization for Standardization No reproduction or networking permited without license from IHS Nt fr Resale @iso ISO13770:1997(E) Introduction Over the years it has become recognized that in general, aluminium alloy cylinders should be treated differently in some respects than cylinders constructed of other materials, e.g., steel. One concern for certain alloy/manufacture processes is neck and/or shoulder cracking. Conditions defects or uncontrolled operational stresses. The intent of this document is reduce the risk of neck/shoulder cracking in aluminium cylinders. The material sensitivity, cylinder design and manufacturing defects are covered inlSO7866. ili Noreproductionor netiworking permited withoutlicense from IHS Not for Resale