Designation:F1087−02(Reapproved2009)StandardTestMethodforLinearDimensionalStabilityofaGasketMaterialtoMoisture1ThisstandardisissuedunderthefixeddesignationF1087;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaproceduretodeterminethestabilityofagasketmaterialtolineardimensionalchangeduetohygroscopicexpansionandcontraction.Itsubjectsasampletoextremes,thatis,ovendryingandcompleteimmersioninwater,thathaveshowngoodcorrelationtolowandhighrelativehumidities.21.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SummaryofTestMethod2.1Aseriesofsamplesarepreconditionedtoastablestartingpoint,measured,andthenconditionedtoasecondexposurecondition,eitherwetordry.Thesechangesarethendeterminedandrecorded,andtheresultspresentedaspercentchange.3.SignificanceandUse3.1Gasketmaterialsundergoseveralprocessingstepsfrompointofmanufacturetoinstallationinaflange.Manyapplica-tionsrequireclosecontrolofdimensionalchange.Anaccuratetestmethodfordeterminingtherelativestabilityofvariousmaterialsisneededfordesignandqualityassurancepurposes.Thistestmethodisusefultowardsthatend.Itsimulatestheextremestorageconditionsthatamaterialmayundergopriortoinstallation.Samplesareallowedunrestrictedexpansionorcontraction,andsothistestmethodshouldnotbeusedtopredictbehaviorclampedinaflangeorotherapplications,orduringspecificprocessingsteps.3.2Thistestmethodmeasureslinearchange,andmayneedtobemodifiedifthetestspecimenisnotflat,homogeneous,orfreeofvoids.4.Apparatus4.1Thistestmethodallowsind...
