ISO INTERNATIONAL STANDARD 11621 First edition 1997-04-15 Gas cylinders Procedures for change of gas service Bouteilles a gaz - Mode opératoire pour le changement de service de gaz This material is reproduced from Iso documents under Enternational 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 allowed 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 +41227341079),IHSortheISOLicensor'smembers. ISO Reference number ISO 11621:1997(E) Copyrightliteatinal Organizatin for Standardiation No reproduction or networking permitted without license from IHS Not for Resale ISO 11621:1997(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. Intemnational organizations, governmental collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft Internationai 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 castingavote. International Standard ISO 11621 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational requirements forgas cylinders. AnnexAofthisInternationalStandardisforinformationonly @ISO1997 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,withoutpermission in writing fromthe publisher. International Organization for Standardization Case postale 56 : CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 c=ch; a=40Onet;p=iso; o=isocs; S=central Printed in Switzerland ii No reproduction or networking permited without icense from IHS Not for Resale ISO 11621:1997(E) @ISO Introduction It is occasionally desirable to change gas cylinders from one gas service to another. Certain of these service changes can be made quite easily, while others require a careful inspection of the interior and exterior of the cylinder to detect the presence of corrosion products or contaminants, which must be removed for safety reasons or to avoid undesirable contamination of the contained gas. This International Standard has been prepared to assist those engaged in the filling of gas cylinders for changing cylinders from one gas service to another. ili Copyrightleatinal organizatin for Standardization No reproduction or networking permitted without license from IHS Not for Resale