31-3_Edtn_2008.pdf

AN AMERICAN NATIO NAL STANDARDASME B31.3-2008(Revision of ASME B31.3-2006)Process PipingASME Code for Pressure Piping,B31Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B31.3-2008(Revision of ASME B31.3-2006)Process PipingASME Code for Pressure Piping,B31AN AMERICAN NATIONAL STANDARDCopyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:December 31,2008The next edition of this Code is scheduled for publication in 2010.This Code will become effective6 months after the Date of Issuance.There will be no addenda issued to this edition.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 CommitteePages at http:/cstools.asme.org as they are issued.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 EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.xiCommittee Personnel.xiiiIntroduction.xviiSummary of Changes.xixChapter IScope and Definitions.1300General Statements.1Chapter IIDesign.10Part 1Conditions and Criteria.10301Design Conditions.10302Design Criteria.12Part 2Pressure Design of Piping Components.18303General.18304Pressure 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.36321Piping Support.41Part 6Systems.43322Specific Piping Systems.43Chapter IIIMaterials.45323General Requirements.45325Materials Miscellaneous.54Chapter IVStandards for Piping Components.55326Dimensions and Ratings of Components.55Chapter VFabrication,Assembly,and Erection.58327General.58328Welding.58330Preheating.64331Heat Treatment.65332Bending and Forming.69333Brazing and Soldering.70335Assembly and Erection.70iiiCopyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material w