1、Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution SystemsAN AMERICAN NATIO NAL STANDARDASME B16.40-2008(Revision of ASME B16.40-2002)Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.c
2、Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B16.40-2008(Revision of ASME B16.40-2002)Manually OperatedThermoplastic GasShutoffs a
3、nd ValvesIn Gas DistributionSystemsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thom
4、son Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:April 30,2008The next edition of this Standard is scheduled for publication in 2013.There will be no addendaissued to this edition.AS
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11、eproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.
12、S.A.Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction
13、or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.vi1Scope.12Construction.23Configuration.24Pressure Rating.25Marking.26Production and Qualification Testing.2Tables1Duration of Test.32Maximum Operating Torque Values.43Su
14、stained Test Pressures and Minimum Durations.44Flow and Head Loss Coefficients.5Mandatory AppendicesIValve Design Pressure.7IIReferences.8Nonmandatory AppendixAQuality System Program.9iiiCopyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material witho
15、ut written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDThe B16 Standards Committee was organized in the sprin
16、g of 1920 and held its organizationalmeeting on November 21 of that year.The group operated as a Sectional Committee(laterredesignated as a Standards Committee)under the authorization of the American EngineeringStandards Committee subsequently named American Standards Association,United States ofAmerica Standards Institute,and now American National Standards Institute(ANSI).Sponsorsfor the group were the American Society of Mechanical Engineers,Manufacturers StandardizationSociety of the Valve a
