BS ISO BRITISH STANDARD 21011:2008 Cryogenic vessels - Valves for cryogenic service ICS 23.020.40 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO 21011:2008 National foreword This British Standard is theUK implementation of IS021011:2008. The UK participation in its preparation was entrusted to Technical Committee PVE/18, Cryogenic vessels. Alist of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity fromlegal obligations. This British Standard Amendments/corrigendaissuedsincepublication was published under the authority ofthe Standards Policy and Strategy Date Comments Committee on 31 January 2009 BSI 2009 ISBN9780580545559 BS ISO 21011:2008 ISO INTERNATIONAL STANDARD 21011 First edition 2008-02-01 Cryogenicvessels-Valvesfor cryogenic service Recipients cryogeniques-Robinets pour usage cryogenique Reference number ISO21011:2008(E) @ISO 2008 BS ISO 21011:2008 ISO21011:2008(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 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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTED DOCUMENT ISO 2008 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 copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 0111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2008All rights reserved BS ISO0 21011:2008 ISO 21011:2008(E) Contents Page Foreword. iv 1 Scope 2 Normativereferences 3 Termsand definitions. 4 Requirements 4.1 Materials 4.2 Design. 5 5.1 Type approval... 5.2 Productiontests. 5.3 Test report.. 6 Cleanliness 7 Marking .... 7.1 Marking on the body of the valve... 7.2 Marking on an identification plate.. Bibliography .... @ IS0 2008 -Allrights reserved ili BS IS0 21011:2008 ISO 21011:2008(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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 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 document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. iv ISO2008All rights reserved BSISO21011:2008 ISO 21011:2008(E) INTERNATIONALSTANDARD CryogenicvesselsValvesforcryogenicservice Scope This International Standard specifies the requirements for the design, manufacture and testing of valves for a to operation at temperatures from ambient to cryogenic. It applies to all types of cryogenic valves, including vacuum jacketed cryogenic valves up to size DN 150 This International Standard is not applicable to pressure relief valves covered by IsO 21013-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) applies. Iso5208,Industr