Designation:D4495−21AnAmericanNationalStandardStandardTestMethodforImpactResistanceofPoly(VinylChloride)(PVC)RigidProfilesbyMeansofaFallingWeight1ThisstandardisissuedunderthefixeddesignationD4495;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheenergyrequiredtocrackorbreakrigidpoly(vinylchloride)(PVC)profileunderspecifiedconditionsofimpactbymeansofafallingweight.1.2ThistestmethodisusedeitherbyitselforinconjunctionwithothermethodsformeasuringPVCproducttoughness.1.3Becauseofthewidevarietyofprofilesizesandshapesandthewidevarietyofmanufacturingproceduresandfieldabuse,thistestmethoddoesnotcorrelateuniversallywithalltypesofabuse.Therefore,correlationsmustbeestablishedasneeded.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthisstandard.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD883TerminologyRelatingtoPlasticsE178PracticeforDealingWithOutlyingObservations3.Terminology3.1Definitions—Definitionsareinaccord...
