Designation:F868−02(Reapproved2009)StandardClassificationforLaminatedCompositeGasketMaterials1ThisstandardisissuedunderthefixeddesignationF868;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisclassificationcoversameansforspecifyingordescribingpertinentpropertiesofcommerciallaminatecom-positegasketmaterials(LCGM).Thesestructuresarecom-posedoftwoormorechemicallydifferentlayersofmaterial.Thesematerialsmaybeorganicorinorganic,orcombinationswithvariousbindersorimpregnants.Gasketcoatingsarenotcoveredsincedetailsthereofareintendedtobegivenonengineeringdrawings,orasseparatespecifications.Commer-cialmaterialsdesignatedasenvelopedgasketsareexcludedfromthisclassification;theyarecoveredinPracticeF336.1.2Sinceallofthepropertiesthatcontributetogasketperformancearenotincluded,useofthisclassificationasabasisforselectingLCGMislimited.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A109/A109MSpecificationforSteel,Strip,Carbon(0.25MaximumPercent),Cold-RolledD2000ClassificationSystemforRubberProductsinAuto-motiveApplicationsF104ClassificationSystemforNonmetallicGasketMateri-alsF146TestMethodsforFluidResistanceofGasketMaterialsF336PracticeforDesignandConstructionofNonmetallicEnvelopedGasketsforCorrosiveServiceF433PracticeforEvaluatingThermalConductivityofGas-ketMaterialsF1276TestMethodforCreepRelaxationofLaminatedCompositeGasketMaterials3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1board—thetermboardisusedinthecontex...
