Designation:D2497−07(Reapproved2012)StandardTolerancesforManufacturedOrganic-BaseFilamentSingleYarns1ThisstandardisissuedunderthefixeddesignationD2497;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetolerancescoverfirst-quality,manufactured,organic-basefilamentsingleyarns(namely,bright,semi-dull,dull,solution-dyed,bleached,unbleached,etc.)regardlessofthepackagetype.Thesetolerancescoverpermissiblevaria-tionsinlineardensity,tenacity,elongation,twist,andcommer-cialweight.1.1.1Thesetolerancesdonotapplytorubberyarns,span-dexyarns,metal-coveredyarns,nortobulkyarnssincetestmethodsforthesetypesofyarnarenotavailable.Thesetolerancesdonotapplytoindustrialfilamentyarns.NOTE1—TolerancesforinorganicglassyarnsaregiveninSpecifica-tionsandMethodsD578.1.2Thisstandardcoversonlytolerances.Itdoesnotcoverspecificationsorqualitylevels,foryarnstobeusedforanypurpose.Specificationsforspecificpropertiesaresubjecttoagreementbythepurchaserandthesupplier.NOTE2—Whilethetolerancesspecifiedmaybeappliedtoyarntakenfromfabric,thepropertiesofsuchyarnswilllikelydifferfromtheoriginallevel.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD578SpecificationforGlassFiberStrandsD1423TestMethodforTwistinYarnsbyDirect-CountingD1907TestMethodforLinearDensityofYarn(YarnNum-ber)bytheSkeinMethodD2256TestMethodforTensilePropertiesofYarnsbytheSingle-StrandMethodD2258PracticeforSamplingYarnforTestingD2494TestMethodforCommercialMassofaShipmentofYarnorManufacturedStapleFiberorTowD4849TerminologyRelatedtoYarnsandFibers3.Terminology3.1F...
