SummaryofSignificantChangesinthe2021ASMEBoilerandPressureVesselCodeASMEBPVC.SSC.IV.II.V.IX-2021SectionIVSectionIISectionVSectionIXASMEBPVC.SSC.IV.II.V.IX-2021SummaryofSignificantChangesinthe2021ASMEBoilerandPressureVesselCodeSectionsIV,II,V,andIXTwoParkAvenue•NewYork,NY•10016USAxDateofIssuance:April23,2021ASMEdoesnotissuewrittenrepliestoinquiriesconcerningthispublication.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.TheAmericanSocietyofMechanicalEngineersTwoParkAvenue,NewYork,NY10016-5990Copyright©2021byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CONTENTSListofSectionsintheASMEBoilerandPressureVesselCode.................................ivForeword......................................................................vAcknowledgments................................................................viSECTIONIV....................................................1Introduction....................................................1SignificantChanges....................................................2SECTIONII....................................................5Introduction....................................................5PartA....................................................6PartB....................................................10PartC....................................................13PartDCustomaryandMetric..................................15SECTIONV....................................................19Introduction....................................................19SignificantChanges....................................................20SECTIONIX....................................................25Introduction....................................................25SignificantChanges....................................................28iiiLISTOFSECTIONSINTHEASMEBOILERANDPRESSUREVESSELCODEIRulesforConstructionofPowerBoilersIIMaterials•PartA—Ferro...
