2010ASMEBoilerandPressureVesselCodeANINTERNATIONALCODEVIIIDivision2AlternativeRulesRulesforConstructionofPressureVesselsINTENTIONALLYLEFTBLANKANINTERNATIONALCODE2010ASMEBoiler&PressureVesselCode2010EditionJuly1,2010VIIIDivision2AlternativeRulesRULESFORCONSTRUCTIONOFPRESSUREVESSELSASMEBoilerandPressureVesselCommitteeonPressureVesselsThreeParkAvenue�NewYork,NY�10016USADateofIssuance:July1,2010(IncludesallAddendadatedJuly2009andearlier)ThisinternationalcodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandardsanditisanAmericanNationalStandard.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.ThefootnotesinthisdocumentarepartofthisAmericanNationalStandard.ASMEcollectivemembershipmarkTheaboveASMEsymbolsareregisteredintheU.S.PatentOffice.“ASME”isthetrademarkoftheAmericanSocietyofMechanicalEngineers.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.LibraryofCongressCatalogCardNumber:56-3934PrintedintheUnitedStatesofAmericaAdoptedbytheCounciloftheAmericanSocietyofMechanicalEngineers,1914.Revised1940,1941,1943,1946,1949,1952,1953,1956,1959,1962,1965,1968,1971,1974,1977,1980,1983,1986,1989,1992,1995,1998,2001,2004,2007,2010TheAmericanSocietyofMechanicalEngineersThreeParkAvenue,NewYork,NY10016-5990Copyright©2010byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllRightsReservediiiCONTENTSForeword.............................................................................................................................................................xixStatementsofPolicy............................................................................................................................................xxiPersonnel............................................................................................................................................................xxiiPART1-GENERALREQUIREMENTS1.1General................................................................................................................................................1-21.1.1Introduction.................................................................................................................................1-21.1.2Organization................................................................................................................................1-21.1.3Definitions...................................................................................................................................1-21.2Scope...................................................................................................................................................1-31.2.1Overview.....................................................................................................................................1-31.2.2AdditionalRequirementsforVeryHighPressureVessels..........................................................1-31.2.3GeometricScopeofThisDivision...............................................................................................1-41.2.4ClassificationsOutsidetheScopeofthisDivision......................................................................1-41.2.5CombinationUnits.......................................................................................................................1-51.2.6FieldAssemblyofVessels...........................................................................................................1-51.2.7PressureReliefDevices...............................................................................................................1-61.3StandardsReferencedbyThisDivision..............................................................................................1-61.4UnitsofMeasurement....................................................................................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