ASME_B16-33-2012.pdf

AN AMERICAN NATIONAL STANDARD ASME B16.33-2012Revision of ASME B16.33-2002(R2007)Manually Operated Metallic Gas Valves for Use in Gas Piping Systems Up to 175 psi(Sizes NPS Through NPS 2)ASME B16.33-2012Revision of ASME B16.33-2002(R2007)Manually OperatedMetallic Gas Valves forUse in Gas PipingSystems Up to 175 psi(Sizes NPS Through NPS 2)AN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016 USADate of Issuance:September 21,2012The next edition of this Standard is scheduled for publication in 2017.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Periodically certain actions of the ASME B16 Committee may be published as Cases.Casesand interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items,or to correct typographical or grammatical errorsin codes and standards.Such errata shall be used on the date posted.The Committee Pages can be found at http:/cstools.asme.org/.There is an option available toautomatically receive an e-mail notification when errata are posted to a particular code or standard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput from industry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced 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 2012 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.vi1Scope.12Construction.13Materials.24Design Qualification.35Production Testing.4Figure1Test Assembly.4Tables1Materials for Metallic Valve Parts.22Torque Values.33Bending Moment Values.44Tensile Load Values.55Maximum Turning Torque Values.56Minimum Gas Flows.5Mandatory AppendixIReferences.7Nonmandatory AppendixAQuality System Program.9iiiFOREWORDThe B16 Standards Committee was organized in the Spring 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(ASME),ManufacturersStandardizationSocietyoftheValveandFittingsIndustry,andtheHeatingandPipingContractorsNational Association(later the Mechanical Contractors Association of America).The American Gas Association(AGA)determined that standardization of gas shutoff valvesused in distribution services was desirable and needed.The AGA Task Committee on Standardsfor Valves and Shut-Offs was formed,and development work commenced in 1958.In 1968,itwas determined that a more acceptable document would result if approval were gained fromANSI and to facilitate such action,the AGA Committee became Subcommittee No.13 of the B16activity.ThisStandardoffersmoreperformancerequirementsthanhasbeencustomaryinB16standards.It is expected that this will permit both manufacturers and users greater latitude in produci