31-3_2014.pdf

Process PipingASME Code for Pressure Piping,B31AN INTE R NAT IO NAL PIPING CO D EASME B31.3-2014(Revision of ASME B31.3-2012)Copyright 2015 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cASME B31.3-2014(Revision of ASME B31.3-2012)Process PipingASME Code for Pressure Piping,B31AN INTERNATIONAL PIPING CODETwo Park Avenue New York,NY 10016 USACopyright 2015 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cDate of Issuance:February 27,2015The next edition of this Code is scheduled for publication in 2016.This Code will become effective6 months after the Date of Issuance.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code.Interpretations,Code Cases,and errata are published on the ASME Web site under the CommitteePagesathttp:/cstools.asme.org/astheyareissued.InterpretationsandCodeCasesarealsoincludedwith each edition.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 international code or standard was developed under procedures accredited as meeting the criteria for AmericanNational Standards and it is an American National Standard.The Standards Committee that approved the code orstandard was balanced to assure that individuals from competent and concerned interests have had an opportunity toparticipate.The proposed code or standard was made available for public review and comment that provides anopportunity for 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 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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright 2015 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCONTENTSForeword.xiiCommittee Roster.xivIntroduction.xviiiSummary of Changes.xxChapter IScope and Definitions.1300General Statements.1Chapter IIDesign.10Part 1Conditions and Criteria.10301Design Conditions.10302Design Criteria.12Part 2Pressure Design of Piping Components.20303General.20304Pressure Design of Components.20Part 3Fluid Service Requirements for Piping Components.30305Pipe.30306Fittings,Bends,Miters,Laps,and Branch Connections.30307Valves and Specialty Components.32308Flanges,Blanks,Flange Facings,and Gaskets.32309Bolting.33Part 4Fluid Service Requirements for Piping Joints.33310General.33311Welded Joints.33312Flanged Joints.34313Expanded Joints.34314Threaded Joints.34315Tubing Joints.35316Caulked Joints.35317Soldered and Brazed Joints.35318Special Joints.35Part 5Flexibility and Support.36319Piping Flexibility.36320Analysis of Sustained Loads.41321Piping Support.42Part 6Systems.44322Specific Piping Systems.44Chapter IIIMaterials.46323General Requirements.46325Materials Miscellaneous.55Chapter IVStandards for Piping Components.56326Dimensions and Ratings of Components.56Chapter VFabrication,Assembly,and Erection.60327General.60328Welding and Brazing.60330Preheating.67331Heat Treatment.69332Bending and Forming.74iiiCopyright 2015 by the American Society of Mechanical Engineers.No reproduction may be ma