Designation:A714–99(Reapproved2009)´1StandardSpecificationforHigh-StrengthLow-AlloyWeldedandSeamlessSteelPipe1ThisstandardisissuedunderthefixeddesignationA714;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.´1NOTE—Theunitsstatementin1.6wasrevisededitoriallyinApril2009.1.Scope1.1Thisspecificationcoversseamlessandweldedhigh-strengthlow-alloysteelpipeNPS1⁄2toNPS26,inclusive.Pipehavingotherdimensionsmaybefurnishedprovidedsuchpipecomplieswithallotherrequirementsofthisspecification.Thismaterialisintendedforpressurepipingservice,andothergeneralpurposes,wheresavingsinweightoraddeddurabilityareimportant.NOTE1—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisstandardforsuchtraditionaltermsas“nominaldiameter,”“size,”and“nominalsize.”NOTE2—AcomprehensivelistingofstandardizedpipedimensionsiscontainedinANSIStandardB36.10.1.2Class—Thesehigh-strengthlow-alloysteelshaveen-hancedresistancetogeneralatmosphericcorrosionbyweath-eringascommonlyencounteredinrural,urban,marine,andindustrialenvironments.Theyaresuppliedintwoclasses:Class2,havingcorrosionresistanceequivalenttothatofcarbonsteelwithcopper(0.20minimumCu);andClass4,havingcorrosionresistancesubstantiallybetterthanthatofClass2(Note3).Class4steelswhenproperlyexposedtotheatmospherecanbeusedbare(unpainted)formanyapplica-tions.NOTE3—Formethodsofestimatingtheatmosphericcorrosionresis-tanceoflowalloysteelsseeGuideG101oractualdata.1.3Type—Pipemaybefurnishedinthefollowingtypesofmanufacturingprocesses:TypeF—Furnace-buttwelded,continuouswelded,TypeE—Electric-resistancewelded,andTypeS—Seamless.1.3.1Pipeorderedunderthisspecificationissuitableforwelding.1.3.2TypeEpipemaybefurnishedeithernonexpandedorcold-expandedattheoptionofthemanufacturer.1.3.3TypesF,E,andSpipearecommonlyfurnishedinnonheat-treat...
