1、Large Metallic Valves for Gas DistributionManually Operated,NPS 21/2(DN 65)to NPS 12(DN 300),125 psig(8.6 bar)MaximumAN AMERICAN NATIO NAL STANDARDASME B16.38-2007Revision of ANSI/ASME B16.38-1985(R2005)Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of thi
2、s 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 or distribution is permitted.Uncontrolled when printed.ASME B16.38-2007Revision of ANSI/ASME B16.38-1
3、985(R2005)Large MetallicValves forGas DistributionManually Operated,NPS 212(DN 65)to NPS 12(DN 300),125 psig(8.6 bar)MaximumAN 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 with
4、out 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.Date of Issuance:February 4,2008The next edition of this Stan
5、dard is scheduled for publication in 2012.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as t
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12、 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.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()
13、,downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.vi1Scope.12Construction.13Qualification Requirements.34Production Testing.4Figure1Bend Test
14、 Assembly.5Tables1Duration of Test.32Bending Moment Values.43Flow and Head Loss Coefficients.6Mandatory AppendixIReferences.7Nonmandatory AppendixAQuality System Program.8iiiCopyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written co
15、nsent 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 spring of 1920 and
16、 held its organizational meetingon November 21 of that year.The group operated as a Sectional Committee(later redesignated as a StandardsCommittee)undertheauthorizationoftheAmericanEngineeringStandardsCommitteesubsequentlynamedAmerican Standards Association,United States of America Standards Institute,and now American NationalStandards Institute(ANSI).Sponsors for the group were the American Society of Mechanical Engineers,Manufacturers Standardization Society of the Valve and Fittings Industry,
