Designation:F2191/F2191M−13AnAmericanNationalStandardStandardSpecificationforPackingMaterial,GraphiticorCarbonBraidedYarn1ThisstandardisissuedunderthefixeddesignationF2191/F2191M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversstapleorcontinuousfilamentcarbon/graphiteyarnvalvestemcompressionpacking,suitableforuseasend-ringsonpackingsystemsforvalves.Intendedservicesincludesteam,hydrocarbons,waterandnon-oxidizingchemicals.WherethisspecificationisinvokedasASTMF2191,Sections1–18apply.WherethisspecificationisinvokedasASTM/DoDF2191,Sections1–18andtheSupplementaryRequirementsshallbeapplicable.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C135TestMethodforTrueSpecificGravityofRefractoryMaterialsbyWaterImmersionC561TestMethodforAshinaGraphiteSampleC562TestMethodforMoistureinaGraphiteSampleC816TestMethodforSulfurinGraphitebyCombustion-IodometricTitrationMethodC889TestMethodsforChemicalandMassSpectrometricAnalysisofNuclear-GradeGadoliniumOxide(Gd2O3)PowderD129TestMethodforSulfurinPetroleumProducts(Gen-eralHighPressureDecompositionDeviceMethod)D512TestMethodsforChlorideIonInWaterD1179TestMethodsforFluorideIoninWaterD1246TestMethodforBromideIoninWaterD3178TestMethodsforCarbonandHydrogenintheAnalysisSampleofCoalandCoke(Withdrawn2007)3D3684TestM...
