Designation:D2258/D2258M−16StandardPracticeforSamplingYarnforTesting1ThisstandardisissuedunderthefixeddesignationD2258/D2258M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thispracticedescribesaprocedureforthedivisionofshipmentsofyarnintotestlotsandthesamplingofsuchlotsfortesting.1.1.1Thispracticecanbeusedforlotsampletestingofyarnsforbothpre-fabricproductionandpost-fabricproduc-tion.1.2Thispracticeisapplicabletosingle,plied,orcabledyarns,andcords,madeofanyfiberormixtureoffibers,andsupportedonanyformofpackage,includingbeams.1.3Thispracticealsodescribesproceduresforthesamplingofyarn(s)removedfromwovenorknittedfabrics;however,whenthussampled,theyarnsareusuallynotrepresentativeofentireshipments,asreferredtoin1.1.Consequently,theresultantsamplingcanonlybeusedtodeterminethecharac-teristicsoftheyarnandisusuallynotusedforacceptancetesting.Moreover,itshouldberecognizedthatthecharacter-isticsofyarnsfromfabricsmaybedifferentthanthecharac-teristicsofthesameyarn(s),priortobeingenteredintothefabricmanufacturingprocess.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1578TestMethodforBreakingStrengthofYarninSkeinFormD1907TestMethodforLinearDensityofYarn(YarnNum-ber)b...
