ASME_B31E-2008.pdf

Standard for the Seismic Design and Retrofit of Above-Ground Piping SystemsASME Code for Pressure Piping,B31AN AMERICAN NATIO NAL STANDARDASME B31E-2008ASME B31E-2008Standard for theSeismic Designand Retrofitof Above-GroundPiping SystemsASME Code for Pressure Piping,B31AN AMERICAN NATIONAL STANDARDDate of Issuance:July 14,2008The next edition of this Standard is scheduled for publication in 2011.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued and will also be published within the next edition of thisStandard.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 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 EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B31 Committee.viIntroduction.vii1Purpose.12Materials.23Design.24Interactions.55Documentation.56Maintenance.57References.5Tables1Seismic Design Requirements,Applicable Sections.32Maximum Span,ft(m),Between Lateral Seismic Restraints for Steel Pipe Witha Yield Stress of 35 ksi(238 MPa),in Water Service at 70F(21C).3iiiFOREWORDSeismic design of critical piping systems is often required by Building Codes or by regulation,or it may be voluntarily instituted for loss prevention and worker and public safety.While seismic loads are mentioned in the various sections of the ASME B31 Pressure PipingCode,and allowable stresses are provided for occasional loads,there has been a need to providemore explicit and structured guidance for seismic design of new piping systems,as well as retrofitof existing systems.In order to respond to this need,this Standard was prepared by the ASME B31Mechanical Design Technical Committee.This 2008 edition was approved by the American National Standards Institute on April 21,2008and designated as ASME B31E-2008.ivASME B31 COMMITTEECode for Pressure Piping(The following is the roster of the Committee at the time of approval of this Standard.)COMMITTEE OFFICERSM.L.Nayyar,ChairK.C.Bodenhamer,Vice ChairN.Lobo,SecretaryCOMMITTEE PERSONNELH.A.Ainsworth,ConsultantR.J.T.Appleby,ExxonMobil Upstream Research Co.C.Becht IV,Becht Engineering Co.A.E.Beyer,Fluor DanielK.C.Bodenhamer,Enterprise Products Co.J.S.Chin,TransCanada Pipeline USD.L.Coym,Worley ParsonsJ.A.Drake,Spectra Energy TransmissionD.M.Fox,Atmos EnergyJ.W.Frey,Stress Engineering Service,Inc.D.R.Frikken,Becht Engineering Co.R.A.Grichuk,Fluor Corp.L.E.Hayden,Jr.,ConsultantG.A.Jolly,Vogt Valves Flowserve Corp.W.J.Koves,UOP LLCN.Lobo,The American Society of Mechanical EngineersB31 MECHANICAL DESIGN TECHNICAL COMMITTEEW.J.Koves,Chair,UOP LLCG.A.Antaki,Vice Chair,Becht Nuclear ServicesT.Lazar,Secretary,The American Society of Mechanical EngineersC.Becht IV,Becht Engineering Co.J.P.Breen,Becht Engineering Co.J.P.Ellenberger,ConsultantD.J.Fetzner,BP Exploration Alaska,Inc.J.A.Graziano,Tennessee Valley AuthorityJ.D.Hart,SSD,Inc.R.W.Haupt,Pressure Piping Engineering Associates,Inc.B.P.Holbrook,Babcock Power,Inc.vR.P.Merrill,Evapco,Inc.J.E.Meyer,Louis Perry&Associates,Inc.E.Michalopoulos,Ministry of Economics of GreeceM.L.