ISO 15761-2020 钢闸门、截止阀和止回阀对于DN 100及以下的尺寸对于石油和天然气工业.pdf

Steel gate,globe and check valves for sizes DN 100 and smaller,for the petroleum and natural gas industriesRobinets-vannes,robinets soupape et clapets de non retour en acier de dimensions DN 100 et infrieures,pour les industries du ptrole et du gaz naturel ISO 2020INTERNATIONAL STANDARDISO15761Second edition2020-08Reference numberISO 15761:2020(E)ISO 15761:2020(E)ii ISO 2020 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2020All rights reserved.Unless otherwise specified,or required in the context of its implementation,no part of this publication may be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting on the internet or an intranet,without prior written permission.Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCP 401 Ch.de Blandonnet 8CH-1214 Vernier,GenevaPhone:+41 22 749 01 11Email:copyrightiso.orgWebsite:www.iso.orgPublished in Switzerland ISO 15761:2020(E)Foreword.vIntroduction.vi1 Scope.12 Normative references.13Termsanddefinitions.34 Pressure/temperature ratings.34.1 Valve ratings.34.2 Temperature constraints.45 Design.45.1 Reference design.45.2 Flow passageway.55.3 Wall thickness.65.4 Valve body.75.4.1 General.75.4.2 Socket welding ends.75.4.3 Threaded ends.85.4.4 Flanged ends.95.4.5 Butt-welding ends.105.4.6 Body seats.115.5 Valve bonnet or cover.115.6 Obturator.135.6.1 Seating surfaces.135.6.2 Gate valve obturators.135.6.3 Globe valve obturators.135.6.4 Check valve obturators.135.7 Stem.145.8 Stem nut or stem bushing.165.9 Packing,packing chamber,and gland.165.10 Packing retention.175.11 Handwheel.176 Materials.176.1 Trim materials.176.2 Materials other than trim.177 Marking.187.1 Legibility.187.2 Body marking.187.3 Ring joint groove marking.207.4 Identification plate marking.207.5 Weld fabrication marking.218 Testing and inspection.218.1 Pressure tests.218.1.1 General.218.1.2 Shell test.228.1.3 Closure leakage test.228.1.4 Optional closure leakage test for gate valves.238.1.5 Backseat leakage test.238.1.6 Fugitive emission testing.238.2 Inspection.249 Preparation for despatch.24Annex A(normative)Requirements for extended body gate valve bodies.25 ISO 2020 All rights reserved iiiContents Page ISO 15761:2020(E)Annex B(normative)Requirements for valves with bellows stem seals.30Annex C(normative)Type testing of bellows stem seals.34Annex D(informative)Identificationofvalveparts.37Annex E(informative)Informationtobespecifiedbythepurchaser.40Annex F(informative)Valve material combinations.42Bibliography.46iv ISO 2020 All rights reserved ISO 15761:2020(E)ForewordISO(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.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,Part 1.In particular,the different approval criteria needed for the different types of ISO documents should be noted.This document was drafted in accordance with the editorial rules of the ISO/IEC Directives,Part 2(see www.iso.org/directives).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.Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received(see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation of the voluntary nature of standards,the meaning of ISO specific terms and expressions related to conformity assessment,as well as information about ISOs adherence to the World Trade Organization(WTO)principles in the Technical Barriers to Trade(TBT)see www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 153,Valves,in collaboration with the European Committee for Standardization(CEN)Technical Committee CEN/TC 12,Materials,equipment and offshore structures for petroleum,petrochemical and natural gas industries,in accordance with the Agreement on technical cooperation between ISO and CEN(Vienna Agreement).This second edition cancels and replaces the first edition(ISO 15761:2002),which has been technically revised:Clause 2 Normative references was updated;addit