Designation:F1315−17StandardTestMethodforDensityofaSheetGasketMaterial1ThisstandardisissuedunderthefixeddesignationF1315;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedurefordeterminingthedensityofagasketmaterial.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodF104ClassificationSystemforNonmetallicGasketMateri-als3.SummaryofTestMethod3.1Adie-cutspecimenisconditioned.Thickness,weight,andareaaremeasured,andthedensityiscalculatedandreported.4.SignificanceandUse4.1Densityisanimportantpropertyofagasketmaterial,sinceithasaninverserelationshiptothevoidvolumeofthematerial.Densityisoftenusedinaspecification,sincerela-tionshipstosealability,compressibility,creeprelaxation,andtensilestrengthcanbefoundforagivengasketgrade.4.2Densityisameasurementofthemasstothevolumeratioandthereforeeasilydeterminedwithaweightscaleandthicknessmeasuringdevice.Thistestmethodrequiresfrom1htotwodaysofsampleconditioning,whichisnecessarytoachieveahighlevelofprecision,butwhichdetractsfromitsusefulnessasaproductiontestmethod.Whereitmustbemodifiedformanufacturingcontrol,itisrecommendedthatthicknessandweightmeasurementmethodsbeadheredtostrictly.5.Interferences5.1Moistureaddstotheweightofmostgasketspecimens,andmaycausethematerialtoswell.Properconditioningofthespecimenshouldcontrolmoistureasavariable.6.Apparatus6.1Thickness—Athicknessmeasurementde...
