ASME_B31.5-2019.pdf

Refrigeration Piping andHeat Transfer ComponentsASME Code for Pressure Piping,B31AN INTE R NAT IO NAL PIPING CO D EASME B31.5-2019(Revision of ASME B31.5-2016)ASME B31.5-2019(Revision of ASME B31.5-2016)RefrigerationPiping andHeat TransferComponentsASME Code for Pressure Piping,B31AN INTERNATIONAL PIPING CODExDate of Issuance:March 6,2020The next edition of this Code is scheduled for publication in 2022.This Code will become effective 6 months after the Date ofIssuance.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code.Interpretations arepublished on the Committee web page and under http:/go.asme.org/Interpretations.Periodically certain actions of theASME B31 Committee may be published as Cases.Cases are published on the ASME website under the B31 CommitteePage at http:/go.asme.org/B31committee as they are issued.Errata to codes and standards may be posted on the ASME website under the Committee Pages of the associated codes andstandardstoprovidecorrectionstoincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Such errata shall be used on the date posted.The B31 Committee Page can be found at http:/go.asme.org/B31committee.The associated B31 Committee Pages for eachcode and standard can be accessed from this main page.There is an option available to automatically receive an e-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.This international code or standard was developed under procedures accredited as meeting the criteria for American National StandardsanditisanAmericanNationalStandard.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-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 2020 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.viCommittee Roster.viiCorrespondence With the B31 Committee.ixIntroduction.xiSummary of Changes.xiiiChapter IScope and Definitions.1500General Statements.1Chapter IIDesign.10Part 1Conditions and Criteria.10501Design Conditions.10502Design Criteria.11Part 2Design of Piping Components.23503Criteria for Design of Piping Components.23504Pressure Design of Piping Components.23Part 3Design Application of Piping Components Selection and Limitations.33505Pipe.33506Fittings,Bends,and Intersections.34507Valves.34508Flanges,Blanks,Flange Facings,Gaskets,and Bolting.34Part 4Selection and Limitations of Piping Joints.35510Piping Joints.35511Welded Joints.35512Flanged Joints.35513Expanded Joints.35514Threaded Joints.35515Flared,Flareless,and Compression Joints.36517Brazed and Soldered Joints.36518Sleeve Coupled and Other Novel or Patented Joints.36Part 5Expansion,Flexibility,Structural Attachments,Supports,and Restraints.36519Expansion and Flexibility.36520Design of Pipe Supporting Elements.46521Design Loads for Pipe Supporting Elements.47Chapter IIIMaterials.49523Materials General Requirements.49524Materials Applied to Miscellaneous Parts.55Chapter IVDimensional Requirements.56526Dimensional Requirements for Standard and Nonstandard Piping Components.56Chapter VFabrication and Assembly.59iii527Welding.59528Brazing and Soldering.66529Bending Hot and Cold.68530Forming.69531Heat Treatment.69535Assembly.70Chapter VIExamination,Inspection,and Testing.75536Examination.75537Inspection.77538Testing.77539Records.78Mandatory AppendixIReferenced Standards.79No