6-20_2012.pdf

AN AM E R IC AN NAT IO NAL STANDARDASME B16.20-2012(Revision of ASME B16.20-2007)Metallic Gaskets for Pipe Flanges Ring-Joint,Spiral-Wound,and JacketedCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.20-2012(Revision of ASME B16.20-2007)Metallic Gasketsfor Pipe FlangesRing-Joint,Spiral-Wound,and JacketedAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USACopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance:June 25,2013The 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.Cases and 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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword.vCommittee Roster.viCorrespondence With the B16 Committee.viiImportant Information Concerning Use of Asbestos or Alternative Materials.viiiSummary of Changes.xi1Scope.12Ring-Joint Gaskets.13Spiral-Wound Gaskets.24Jacketed Gaskets.35Grooved Metal Gaskets With Covering Layers.3Figures1Spiral-Wound Gaskets(Metric).52Jacketed Gaskets(Metric).53Grooved Metal Gasket With Covering Layers.64Illustration of Example Markings for Grooved MetalGasket With Covering Layers.7Tables1Maximum Hardness for Ring Gaskets.12Ring Gasket Markings.23Type R Ring Gasket Dimensions and Tolerances.84Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards.115Type RX Ring Gasket Dimensions and Tolerances.136Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards.157Type BX Ring Gasket Dimensions and Tolerances.168Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards.179Dimensions for Spiral-Wound Gaskets Used With ASME B16.5 Flanges.1810Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges.1911Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series B Flanges.2012Inner-Ring Inside Diameters for Spiral-Wound Gaskets for Use With