Designation:D2258−99(Reapproved2012)StandardPracticeforSamplingYarnforTesting1ThisstandardisissuedunderthefixeddesignationD2258;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thispracticedescribesaprocedureforthedivisionofshipmentsofyarnintotestlotsandthesamplingofsuchlotsfortesting.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-poundunitsaretoberegardedseparatelyasthestandard.Withinthetext,theinch-poundunitsareshowninparentheses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththispractice.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1578TestMethodforBreakingStrengthofYarninSkeinFormD1907TestMethodforLinearDensityofYarn(YarnNum-ber)bytheSkeinMethodD4271PracticeforWritingStatementsonSa...
