Designation:D3217/D3217M−20StandardTestMethodsforBreakingTenacityofManufacturedTextileFibersinLooporKnotConfigurations1ThisstandardisissuedunderthefixeddesignationD3217/D3217M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthemeasurementofthebreakingtenacityofmanufacturedtextilefiberstakenfromfilamentyarns,staple,ortowfiber,eithercrimpedoruncrimped,andtestedineitheradoublelooporasastrandformedintoasingleoverhandknot.1.2Methodsformeasuringthebreakingtenacityofcondi-tionedandwet(immersed)fibersinloopandknotformareincluded.1.3Elongationinlooporknottestshasnoknownsignificance,andisusuallynotrecorded.1.4ThebasicdistinctionbetweentheproceduresdescribedinthesetestmethodsandthoseincludedinTestMethodsD2101istheconfigurationofthespecimen,thatis,eitherasadoublelooporintheconfigurationofasingleoverhandknot.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequivalents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D76SpecificationforTensileTestingMachinesforTextilesD123TerminologyRelatingtoTextilesD...
