ASME_B16.3-2021.pdf

AN AM E R IC AN NAT IO NAL STANDARDASME B16.3-2021(Revision of ASME B16.3-2016)Malleable IronThreaded FittingsClasses 150 and 300ASME B16.3-2021(Revision of ASME B16.3-2016)Malleable IronThreaded FittingsxClasses 150 and 300AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USAxDate of Issuance:January 17,2022The next edition of this Standard is scheduled for publication in 2026.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 website 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 2022 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedCONTENTSForeword.vCommittee Roster.viiCorrespondence With the B16 Committee.viiiSummary of Changes.xList of Changes in Record Number Order.xi1Scope.12General.13PressureTemperature Ratings.14Size.25Marking.26Material.37Dimensions and Tolerances.38Threading.39Ribs.410Plugs,Bushings,and Locknuts.411Face Bevel.412Coatings.4Mandatory AppendixIReferences.22Nonmandatory AppendixAQuality System Program.23Figures4.2-1Identification of Reducing Fittings.28.2-1Gaging of Chamfered Internal Threads.21Tables3-1PressureTemperature Ratings.27.1-1Dimensions of Class 150 90-deg Elbows,Tees,and Crosses,and 45-deg Elbows(Straight Sizes)57.1-2Dimensions of Class 150 45-deg Y-Branches(Straight Sizes).67.1-3Dimensions of Class 150 Street Tees and 90-deg and 45-deg Street Elbows.77.1-4Dimensions of Class 150 Closed-,Medium-,and Open-Pattern Return Bends.87.1-5Dimensions of Class 300 90-deg Elbows,Tees,and Crosses,and 45-deg Elbows(Straight Sizes)97.1-6Dimensions of Class 300 Couplings.107.1-7Dimensions of Class 300 Caps.117.1-8Dimensions of Class 300 90-deg and 45-deg Street Elbows.12iii7.1-9Dimensions of Class 300 Return Bends.137.2.1-1Dimensions of Class 150 90-deg Elbows and Crosses(Reducing Sizes).147.2.1-2Dimensions of Class 150 Tees(Reducing Sizes).157.2.1-3Dimensions of Class 150 Couplings(Straight and Reducing Sizes).177.2.1-4Center-to-End Dimensions of Class 300 90-deg Elbows(Reducing Sizes).187.2.1-5Center-to-End Dimensions of Class 300 Tees(Reducing Sizes).187.2.1-6Dimensions of Class 300 Reducing Couplings.197.3-1Inspection Tolerances.198.1-1Dimensions of Class 150 Caps.20ivFOREWORDIn 1921,the American Engineering Standards Committee,later the American Standards Association(ASA)andcurrently the American National Standards Institute(ANSI),authorized the organization of a Sectional Committeeon the Standardization of Pipe Flanges and Flanged Fittings,with the following organizations as joint sponsors:Heating,Piping,and Air Conditioning Contractors National Association lat