6-20_Edtn_2007.pdf

Metallic Gaskets for Pipe FlangesRing-Joint,Spiral-Wound,and JacketedAN AMERICAN NATIO NAL STANDARDASME B16.20-2007(Revision of ASME B16.20-1998)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 or distribution is permitted.Uncontrolled when printed.ASME B16.20-2007(Revision of ASME B16.20-1998)Metallic Gasketsfor Pipe FlangesRing-Joint,Spiral-Wound,andJacketedAN AMERICAN NATIONAL STANDARDCopyright 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 or distribution is permitted.Uncontrolled when printed.Date of Issuance:May 19,2008The next edition of this Standard is scheduled for publication in 2013.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 they are issued.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 assume 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 2008 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(),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.viImportant Information Concerning Use of Asbestos or Alternative Materials.vii1Scope.12Ring-Joint Gaskets.13Spiral-Wound Gaskets.24Jacketed Gaskets.3Tables1Maximum Hardness for Ring Gaskets.12Ring Gasket Markings.23Type R Ring Gasket Dimensions and Tolerances.44Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards.75Type RX Ring Gasket Dimensions and Tolerances.96Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards.117Type BX Ring Gasket Dimensions and Tolerances.128Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards.139Dimensions for Spiral-Wound Gaskets Used With ASME B16.5 Flanges.1410Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges.1611Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series B Flanges.1812Inner-Ring Inside Diameters for Spiral-Wound Gaskets for Use With ASME B16.5Flanges.2013Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used Between ASMEB16.47 Series A Flanges.2114Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used Between ASMEB16.47 Series B Flanges.2215Minimum Pipe Wall Thickness Suitable for Use of Spiral-Wound Gaskets WithInner Rings for ASME B16.5 Flanges.2316Maximum Bore of ASME B16.5 Flanges for Use With Spiral-Wound Gaskets.2417Maximum Bore of ASME B16.47 Series A Flanges for Use WithSpi