Designation:A409/A409M−15StandardSpecificationforWeldedLargeDiameterAusteniticSteelPipeforCorrosiveorHigh-TemperatureService1ThisstandardisissuedunderthefixeddesignationA409/A409M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecification2coversstraightseamorspiralseamelectric-fusion-welded,light-wall,austeniticchromium-nickelalloysteelpipeforcorrosiveorhigh-temperatureservice.ThesizescoveredareNPS14to30withextralight(Schedule5S)andlight(Schedule10S)wallthicknesses.TableX1.1showsthewallthicknessofSchedule5Sand10Spipe.Pipehavingotherdimensionsmaybefurnishedprovidedsuchpipecom-plieswithallotherrequirementsofthisspecification.1.2SeveralgradesofalloysteelarecoveredasindicatedinTable1.1.3Optionalsupplementaryrequirementsareprovided.Thesecallforadditionalteststobemade,andwhendesiredshallbestatedintheorder,togetherwiththenumberofsuchtestsrequired.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedintheorder.NOTE1—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisstandardforsuchtraditionaltermsasnominaldiameter,size,andnominalsize.2.ReferencedDocuments2.1ASTMStandards:3A262PracticesforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteelsA480/A480MSpecificationforGeneralRequirementsforFlat-RolledStainlessandHeat-ResistingSteelPlate,Sheet,andStripA999/A999MSpecificationforGeneralRequirementsforAlloyandStainlessSteelPipeE527PracticeforNumberingMetalsandAlloysintheUnifiedNumber...
