ANAMERICANNATIONALSTANDARDASMEB31.9-2011(RevisionofASMEB31.9-2008)BuildingServicesPipingASMECodeforPressurePiping,B31CopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---//^:^^#^~^^":~::"^$$^~@""#:$@^$^:#*""*~~$"^^:@^^^~~":\\CopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---//^:^^#^~^^":~::"^$$^~@""#:$@^$^:#*""*~~$"^^:@^^^~~":\\ASMEB31.9-2011(RevisionofASMEB31.9-2008)BuildingServicesPipingASMECodeforPressurePiping,B31ANAMERICANNATIONALSTANDARDThreeParkAvenue•NewYork,NY•10016USACopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---//^:^^#^~^^":~::"^$$^~@""#:$@^$^:#*""*~~$"^^:@^^^~~":\\DateofIssuance:May31,2011ThenexteditionofthisCodeisscheduledforpublicationin2014.ThisCodewillbecomeeffective6monthsaftertheDateofIssuance.Therewillbenoaddendaissuedtothisedition.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisCode.Theinterpretationsareincludedwiththisedition.ASMEistheregisteredtrademarkofTheAmericanSocietyofMechanicalEngineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingas...
