ISO 15848-1-2015 工业阀门.测量、试验和鉴定程序无组织排放-第1部分:阀门型式试验的分类系统和鉴定程序.pdf

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ISO 15848-1-2015 工业阀门.测量、试验和鉴定程序无组织排放-第1部分:阀门型式试验的分类系统和鉴定程序.pdf_第1页
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ISO 2015Industrial valves Measurement,test and qualification procedures for fugitive emissions Part 1:Classification system and qualification procedures for type testing of valvesRobinetterie industrielle Mesurage,essais et modes opratoires de qualification pour missions fugitives Partie 1:Systme de classification et modes opratoires de qualification pour les essais de type des appareils de robinetterieINTERNATIONAL STANDARDISO15848-1Second edition2015-06-01Reference numberISO 15848-1:2015(E)ISO 15848-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved.Unless otherwise specified,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 officeCase postale 56 CH-1211 Geneva 20Tel.+41 22 749 01 11Fax+41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerland ISO 15848-1:2015(E)Foreword.ivIntroduction.vi1 Scope.12 Normative references.13 Terms and definitions.14 Symbols and abbreviations.35 Type test.45.1 Test conditions.45.1.1 Preparation of a valve to be tested.45.1.2 Test fluid.45.1.3 Test temperature.45.1.4 Measurement of test valve temperature.45.1.5 Leakage measurement.75.2 Test procedures.85.2.1 Safety rules.85.2.2 Test equipment.85.2.3 Stem(or shaft)seal adjustment(SSA).85.2.4 Test description.96 Performance classes.116.1 Classification criteria.116.2 Tightness classes.116.2.1 Definition.116.2.2 Helium as test fluid.126.2.3 Methane as test fluid.126.2.4 Correlations.126.3 Endurance classes.126.3.1 Mechanical-cycle classes for isolating valves.126.3.2 Mechanical-cycle classes for control valves.146.4 Temperature classes.156.5 Examples of class designation.166.6 Marking.167 Reporting.168 Extension of qualification to untested valves.17Annex A(normative)Total leak rate measurement.19Annex B(normative)Leak measurement using the sniffing method.32Annex C(informative)Leak rate conversion(helium).41Bibliography.43 ISO 2015 All rights reserved iiiContents Page-,-,-ISO 15848-1:2015(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 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 trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade(TBT),see the following URL:Foreword Supplementary information.The committee responsible for this document is ISO/TC 153,Valves,Subcommittee SC 1,Design,manufacture,marking and testing.This second edition cancels and replaces the first edition(ISO 15848-1:2006)which has been technically revised.The main changes are the following:leak rate at the stem seal(Table 1)is expressed in mbarls1 per mm stem diameter;flushing method is replaced by accumulation or suck through method to measure leak rate from stem seal with Helium(Annex A);leakage is expressed in ppmv;leakage with methane is measured by sniffing;for tightness Class AH,leak rate 1,78107 mbarls1mm1(105 mgs1m1);the appropriate leak rate is given for Classes BH and CH;addition of Table 3 which gives tightness classes for stem(or shaft)seals with methane;there is no correlation intended between the tightness classes when the test fluid is helium(Classes AH,BH,CH)and when the test fluid is methane(Classes AM,BM,CM);modification of the number of mechani

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