Designation:A949/A949M−01(Reapproved2014)StandardSpecificationforSpray-FormedSeamlessFerritic/AusteniticStainlessSteelPipe1ThisstandardisissuedunderthefixeddesignationA949/A949M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversspray-formedseamlessferritic/austeniticstainlesssteelpipeintendedforgeneralcorrosiveservice,withparticularemphasisonresistancetostresscorro-sioncracking.Thesesteelsaresusceptibletoembrittlementifusedforprolongedperiodsatelevatedtemperatures.1.2Optionalsupplementaryrequirementsareprovidedforpipewhereagreaterdegreeoftestingisdesired.Thesesupplementaryrequirementscallforadditionalteststobemadeandwhendesired,oneormoreofthesemaybespecifiedintheorder.1.3AppendixX1ofthisspecificationliststhedimensionsofseamlessstainlesssteelpipeasshowninANSIB36.19.Pipehavingotherdimensionsmaybefurnishedprovidedsuchpipecomplieswithallotherrequirementsofthisspecification.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4.1Withinthetext,theSIunitsareshowninbrackets.1.4.2Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedintheorder.NOTE1—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisstandardforsuchtraditionaltermsas“nominaldiameter,”“size,”and“nominalsize.”2.ReferencedDocuments2.1ASTMStandards:2A450/A450MSpecificationforGeneralRequirementsforCarbonandLowAlloySteelTubesA941TerminologyRelatingtoSteel,StainlessSteel,RelatedAlloys,andFerroalloysA999/A999MSpecificationforGeneralRequirementsforAlloyandStainlessSteelPipeE381MethodofMacroetchTestingSteelBars,Bi...
