2013ASMEBoilerandPressureVesselCodeANINTERNATIONALCODEIRulesforConstructionofPowerBoilers1.2013ASMEFINALCovers_IMECH5.9.indd15/15/135:02PMIRULESFORCONSTRUCTIONOFPOWERBOILERSASMEBoilerandPressureVesselCommitteeonPowerBoilersANINTERNATIONALCODE2013ASMEBoiler&PressureVesselCode2013EditionJuly1,2013TwoParkAvenue�NewYork,NY�10016USADateofIssuance:July1,2013ThisinternationalcodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmer-icanNationalStandardsanditisanAmericanNationalStandard.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanoppor-tunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatpro-videsanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareex-presslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestab-lishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.Theendnotesinthisdocument(ifany)arepartofthisAmericanNationalStandard.ASMEcollectivemembershipmarkCertificationMarkTheaboveASMEsymbolisregisteredintheU.S.PatentOffice.“ASME”isthetrademarkofTheAmericanSocietyofMechanicalEngineers.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.LibraryofCongressCatalogCardNumber:56-3934PrintedintheUnitedStatesofAmericaAdoptedbytheCouncilofTheAmericanSocietyofMechanicalEngineers,1914;latestedition2013.TheAmericanSocietyofMechanicalEngineersTwoParkAvenue,NewYork,NY10016-5990Copyright©2013byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedTABLEOFCONTENTSListofSections................................................................................xiiForeword.....................................................................................xivStatementofPolicyontheUseoftheCertificationMarkandCodeAuthorizationinAdvertising............xviStatementofPolicyontheUseofASMEMarkingtoIdentifyManufacturedItems........................xviSubmittalofTechnicalInquiriestotheBoilerandPressureVesselStandardsCommittees.................xviiPersonnel.....................................................................................xixPreamble.....................................................................................xxxivSummaryofChanges...........................................................................xxxviListofChangesinRecordNumberOrder..........................................................xliiiCross-ReferencingandStylisticChangesintheBoilerandPressureVesselCode.........................xlviiPartPGGeneralRequirementsforallMethodsofConstruction..............1General..........................................................1PG-1Scope............................................................1PG-2ServiceLimitations................................................1PG-3ReferencedStandards..............................................1PG-4Units............................................................1Materials.........................................................2PG-5General..........................................................2PG-6Plate............................................................3PG-7Forgings.........................................................3PG-8Castings.........................................................3PG-9Pipes,Tubes,andPressure‐ContainingParts..........................3PG-10MaterialIdentifiedwithorProducedtoaSpecificationnotPermittedbythisSection,andMaterialnotFullyIdentified...........................6PG-11MiscellaneousPressureParts.......................................7PG-12WaterLevelIndicatorsandConnectorMaterial........................8PG-13Stays............................................................9PG-14Rivets...........................................................9Design...........................................................9PG-16General..........................................................9PG-17FabricationbyaCombinationofMethods.............................10PG-18DesignValidationbyProofTest.....................................10PG-19ColdFormingofAusteniticMaterials.................................10PG-20ColdFormingOfCreepStrengthEnhancedFerriticSteels...............10P