Designation:A335/A335M−15aStandardSpecificationforSeamlessFerriticAlloy-SteelPipeforHigh-TemperatureService1ThisstandardisissuedunderthefixeddesignationA335/A335M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversnominalwallandminimumwallseamlessferriticalloy-steelpipeintendedforhigh-temperatureservice.Pipeorderedtothisspecificationshallbesuitableforbending,flanging(vanstoning),andsimilarform-ingoperations,andforfusionwelding.Selectionwilldependupondesign,serviceconditions,mechanicalproperties,andhigh-temperaturecharacteristics.1.2Severalgradesofferriticsteels(seeNote1)arecovered.TheircompositionsaregiveninTable1.NOTE1—Ferriticsteelsinthisspecificationaredefinedaslow-andintermediate-alloysteelscontaininguptoandincluding10%chromium.1.3Supplementaryrequirements(S1toS8)ofanoptionalnatureareprovided.SupplementaryrequirementsS1throughS6callforadditionalteststobemade,andwhendesired,shallbesostatedintheordertogetherwiththenumberofsuchtestsrequired.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedintheorder.NOTE2—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisstandardforsuchtraditionaltermsas“nominaldiameter,”“size,”and“nominalsize.”2.ReferencedDocuments2.1ASTMStandards:3A999/A999MSpecificationforGeneralRequirementsforAlloyandStainlessSteelPipeE92TestMethodforVickersHardnessofMetallicMaterials(...
