Designation:D7127−17StandardTestMethodforMeasurementofSurfaceRoughnessofAbrasiveBlastCleanedMetalSurfacesUsingaPortableStylusInstrument1ThisstandardisissuedunderthefixeddesignationD7127;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesashoporfieldprocedurefordeterminationofroughnesscharacteristicsofsurfacespreparedforpaintingbyabrasiveblasting.Theprocedureusesaportableskiddedornon-skiddedstylusprofiletracinginstrument.Themeasuredcharacteristicsare:RtandRpc.Additionalmeasuresofprofileheight(Rmaxand/orRz)mayalsobeobtainedasagreeduponbypurchaserandseller.(Thedigitally-determinedprofileparametersRt,Rmax,RyandRzlmaxareextremelysimilarindefinition.)1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Ingeneral,thismethodshouldbelimitedtothemea-surementofsurfaceroughnesswhereRtisintherange10to150µm(0.4to6mil)andwherethePeakCount,Rpcislessthan180peaks/cm(450peaks/in.).1.4SSPCstandardSSPC-PA17providesadditionalguid-ancefordeterminingconformancewithsurfaceprofilerequire-ments.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4417TestMethodsforFieldMeasurementofSurfaceProfileofBlastCleanedSteelE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691Pr...
