FiredSteamGeneratorsANAMERICANNATIONALSTANDARDASMEPTC4-2008(RevisionofASMEPTC4-1998)PerformanceTestCodesASMEPTC4-2008FiredSteamGeneratorsPerformanceTestCodesANAMERICANNATIONALSTANDARD(RevisionofASMEPTC4-1998)DateofIssuance:January9,2009ThisCodewillberevisedwhentheSocietyapprovestheissuanceofanewedition.Therewillbenoaddendaissuedtothisedition.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthiscode.PeriodicallycertainactionsoftheASMEPTCCommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesat“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumesanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.TheAmericanSocietyofMechanicalEngineersThreeParkAvenue,NewYork,NY10016-5990Copyright©2009byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.iiiCONTENTSNotice....................................................................................................................................................................................viForeword..............................................................................................................................................................................viiCommitteeRoster................................................................................................................................................................ixCorrespondenceWiththePTC4Committee..................................................................................................................xSection1ObjectandScope....................................................................................................................................11-1Object...............................................................................................................................................................11-2Scope................................................................................................................................................................11-3TypicalUncertaintyforEfficiency...............................................................................................................21-4SteamGeneratorBoundaries.......................................................................................................................3Section2DefinitionsandDescriptionofTerms......................................................................................................122-1Definitions......................................................................................................................................................122-2Abbreviations.................................................................................................................................................152-3UnitsandConversions..................................................................................................................................15Section3GuidingPrinciples...................................................................................................................................173-1Introduction....................................................................................................................................................173-2PerformanceTestProcedures.......................................................................................................................203-3ReferencestoOtherCodesandStandards.................................................................................................273-4To