ISO INTERNATIONAL STANDARD 25760 First edition 2009-06-15 Gas cylinders Operational procedures for the safe removal of valves from gas cylinders Bouteilles a gaz - Modes opératoires de dépose en toute sécurité des robinets de bouteilles a gaz Reference number ISO 25760:2009(E) @ ISO 2009 py IHS under lic ted without license from IHS Not for Resale ISO 25760:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2009 - All rights reserved edwithoutlicense from IHS Not for Resale ISO 25760:2009(E) Contents Page Foreword iv Introduction 1 2 Normative references 3 Terms and definitions 4 General requirements 4.1 Application .. 4.2 Hazards. 4.3 Operatorsafetyandprotection 4.4 Operator qualifications.... 4.5 Operator errors . 4.6 Special valve designs 5 Methods for inoperable valves. 5.1 Summary of methods . 5.2 Choice of method.... 6 Procedures. 6.1 Procedures to identify and segregate cylinders with inoperable valves. 6.2 Standard devalving procedure for treating cylinders with operable valves 6.3 Procedures for treating cylinders with inoperable valves... 1 Damaged valves and cylinders 8 AnnexA(informative)Reasonscylindervalvesbecomeinoperable. Annex B (informative) Examples of methods for depressurization of gas cylinders with inoperable valves.... 11 Bibliography 18 Copyright International Organization for Standardizalon ghts reserved ii se from IHS Not for Resale