Designation:D2645−07(Reapproved2012)StandardTolerancesforYarnsSpunontheCottonorWorstedSystems1ThisstandardisissuedunderthefixeddesignationD2645;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetolerancesareapplicabletoallyarnsspunonthecottonortheworstedsystem,eithercardedorcombed,andcomposedofanyfiberormixtureoffibers,exceptcottontirecordsandnoveltyorfancyyarns.1.2Thesetolerancesareapplicableonlytoyarnstakenfrompackages,andnottoyarnstakenfromgreigeorprocessedfabrics.NOTE1—Fortolerancesforotherspunyarns,seeTolerancesD2644,MethodsD179andD738,andSpecificationsD541andD681.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD179MethodsofTestingCottonTireCordsandCordFabricsMadefromCotton(Withdrawn1974)3D541SpecificationforSingleJuteYarn(Withdrawn1996)3D681SpecificationforJuteRoveandPliedYarnforElec-tricalandPackingPurposes(Withdrawn2000)3D738MethodsofTestingandTolerancesforRopeMadefromBastandLeafFibers(Withdrawn1971)3D1422TestMethodforTwistinSingleSpunYarnsbytheUntwist-RetwistMethodD1423TestMethodforTwistinYarnsbyDirect-CountingD1578TestMethodforBreakingStrengthofYarninSkeinFormD1907TestMethodforLinearDensityofYarn(YarnNum-ber)bytheSkeinMethodD2255TestMethodforGradingSpunYarnsforAppearanceD2256TestMethodforTensilePropertiesofYarnsbytheSingle-StrandMethodD2257TestMethodforExtractableMatterinTextilesD2258PracticeforSamplingYarnforTestingD2494TestMethodforCommercialMassofaShipmentofYarnorManufacturedStapleFiberorTowD2644TolerancesforYarnsSpunontheWoolenSystemD4849TerminologyRelatedtoYarnsandFib...
