ASME_B16.20-2017.pdf

Metallic Gaskets for Pipe FlangesAN AM E R ICAN NAT IO NAL STANDARDASME B16.20-2017(Revision of ASME B16.20-2012)ASME B16.20-2017(Revision of ASME B16.20-2012)Metallic Gasketsfor Pipe FlangesAN AMERICAN NATIONAL STANDARDxDate of Issuance:December 29,2017The next edition of this Standard is scheduled for publication in 2022.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Periodically certainactionsoftheASMEB16CommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEWebsiteunder the Committee Pages at http:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.TheCommitteePagescanbefoundathttp:/cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotification when errata are posted to a particular code or standard.This option can be found on the appropriate CommitteePage after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input 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 any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand 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 2017 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.vCommittee Roster.viCorrespondence With the B16 Committee.viiImportant Information Concerning Use of Asbestos or Alternative Materials.ixSummary of Changes.List of Changes in Record Number Order.xiPART GRGeneral Requirements.1GR-1Scope.1GR-2Quality Systems.1GR-3References.1GR-4Relevant Units.1PART RJRing-Joint Gaskets.2RJ-1Types.2RJ-2Size.2RJ-3Materials.2RJ-4Marking.2RJ-5Dimensions and Tolerances.2RJ-6Surface Finish.2RJ-7Identification Number.2PART SWSpiral-Wound Gaskets.15SW-1Size and Class.15SW-2Dimensions and Tolerances.15SW-3Materials.16SW-4Marking.16PART JAJacketed Gaskets.33JA-1Size and Pressure Class.33JA-2Design.33JA-3Dimensions and Tolerances.33JA-4Materials.33JA-5Marking.33PART GMGrooved Metal Gaskets With Covering Layers.39GM-1Size and Class.39GM-2Dimensions and Tolerances.39GM-3Materials.39GM-4Marking.39Mandatory AppendixIReferences.48iiixNonmandatory AppendixAQuality System Program.49FiguresSW-2.1-1Spiral-Wound Gasket.17JA-3-1Jacketed Gasket.34GM-2.1-1Grooved Metal Gasket With Covering Layers.40GM-4.1-1Illustration of Example Markings for Grooved Metal Gaskets With Covering Layers.47TablesRJ-3.2-1Maximum Hardness for Ring Gaskets.3RJ-4-1Ring Gasket Markings.3RJ-5-1Type R Ring Gasket Dimensions and Tolerances.4RJ-5-2Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards.7RJ-5-3Type RX Ring Gasket Dimensions and Tolerances.10RJ-5-4Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards.12RJ-5-5Type BX Ring Gasket Dimensions and Tolerances.13RJ-5-6Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards.14SW-2.1-1Dimensions for Spiral-Wound Gaskets Used With ASME B16.5 Flanges.18SW-2.1-2Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges.20SW-2.1-3Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series B Flanges.22SW-2.1-4Inside Diameters of Inner Rings for Spiral-Wound Gaskets for Use With ASME B16.5 Flanges24SW-2.1-5InsideDiametersofInnerRingsforSpiral-WoundGasketsUsedBetweenASMEB16.47SeriesAFlanges.25SW-2.