PROCESSPIPING:THECOMPLETEGUIDETOASMEB31.3ThirdEditionbyCharlesBechtIVASMEPressNewYorki©2009byASME,ThreeParkAvenue,NewYork,NY10016Allrightsreserved.PrintedintheUnitedStatesofAmerica.ExceptaspermittedundertheUnitedStatesCopyrightActof1976,nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenpermissionofthepublisher.INFORMATIONCONTAINEDINTHISWORKHASBEENOBTAINEDBYTHEAMERICANSOCIETYOFMECHANICALENGINEERSFROMSOURCESBELIEVEDTOBERELIABLE.HOWEVER,NEITHERASMENORITSAUTHORSOREDITORSGUARANTEETHEACCURACYORCOMPLETENESSOFANYINFORMATIONPUBLISHEDINTHISWORK.NEITHERASMENORITSAUTHORSANDEDITORSSHALLBERESPONSIBLEFORANYERRORS,OMISSIONS,ORDAMAGESARISINGOUTOFTHEUSEOFTHISINFORMATION.THEWORKISPUBLISHEDWITHTHEUNDERSTANDINGTHATASMEANDITSAUTHORSANDEDITORSARESUPPLYINGINFORMATIONBUTARENOTATTEMPTINGTORENDERENGINEERINGOROTHERPROFESSIONALSERVICES.IFSUCHENGINEERINGORPROFESSIONALSERVICESAREREQUIRED,THEASSISTANCEOFANAPPROPRIATEPROFESSIONALSHOULDBESOUGHT.ASMEshallnotberesponsibleforstatementsoropinionsadvancedinpapersor...printedinitspublications(B7.1.3).StatementfromtheBylaws.ForauthorizationtophotocopymaterialforinternalorpersonaluseunderthosecircumstancesnotfallingwithinthefairuseprovisionsoftheCopyrightAct,contacttheCopyrightClearanceCenter(CCC),222RosewoodDrive,Danvers,MA01923,tel:978-750-8400,www.copyright.com.TheLibraryofCongresshascatalogedthehardcovereditionasfollows:Becht,C.Processpiping:thecompleteguidetoASMEB31.3/byCharlesBechtIV.—2nded.p.cm.Includesbibliographicalreferencesandindex.ISBN0-7918-0217-51.Piping—Standards.I.Title.TJ930.B3472004660′.283—dc222004046128Coverphoto:HovensaRefnery,St.Croix,USVICourtesyofHovensaiiToMyWifeMaryAndChildrenCharles,Derek,John,KristeniiiivvAbouttheAuthorDr.Bechtisarecognizedauthorityinpressurevessels,piping,expansionjoints,andelevatedtemperaturedesign.HeisPresidentofBechtEngineeringCo.Inc,aconsultingengineeringcompanythatprovidesbothprocessandequipmentengineeringservicesaswel...
