Designation:A181/A181M−14StandardSpecificationforCarbonSteelForgings,forGeneral-PurposePiping1ThisstandardisissuedunderthefixeddesignationA181/A181M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversnonstandardas-forgedfittings,valvecomponents,andpartsforgeneralservice.Forgingsmadetothisspecificationarelimitedtoamaximumweightof10000lb[4540kg].LargerforgingsmaybeorderedtoSpecificationA266/A266M.1.2Twoclassesofmaterialarecovered,designatedasClasses60and70,respectively,andareclassifiedinaccor-dancewiththeirmechanicalpropertiesasspecifiedin6.1.1.3Thisspecificationisexpressedinbothinch-poundunitsandSIunits.However,unlesstheorderspecifiestheapplicable“M”specificationdesignation(SIunits),thematerialshallbefurnishedtoinch-poundunits.1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.2.ReferencedDocuments2.1ASTMStandards:3A266/A266MSpecificationforCarbonSteelForgingsforPressureVesselComponentsA788/A788MSpecificationforSteelForgings,GeneralRe-quirementsA961/A961MSpecificationforCommonRequirementsforSteelFlanges,ForgedFittings,Valves,andPartsforPipingApplications3.GeneralRequirementsandOrderingInformation3.1ProductfurnishedtothisspecificationshallconformtotherequirementsofSpecificationA961/A961M,includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.FailuretocomplywiththerequirementsofSpecificationA961/A961Mconstitutesnon-conformancewiththisspecifi-cation.3.2Itisthepurchaser’sresponsibilit...
