Designation:F434−93(Reapproved2017)StandardTestMethodforBlow-OutTestingofPreformedGaskets1ThisstandardisissuedunderthefixeddesignationF434;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheresis-tanceagainstblow-outofpreformedgaskets.Thetestisconductedunderambientconditionsandshouldbeusedforcomparisonpurposesonlytoselectsuitabledesignsandconstructionsforspecificapplications.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMAdjuncts:DetailedDrawingsofTestUnit23.SignificanceandUse3.1Thistestmethodisdesignedtocomparealltypesofpreformedgasketsundercontrolledconditionswithrespecttoblow-outresistance.Thistestmethodmaybeusedasaroutinetestwhenagreeduponbetweenthepurchaserandtheseller.4.Apparatus4.1PressureSupply,capableof7MPa(1000psi),prefer-ablyhydraulic,andwithpropersafetyprecautions,intheeventofarapid-gasketfailure.4.2TestUnit,3capableofwithstanding7MPa(1000psi)internalpressureunderambientconditions.Provisionsshouldbemadeforvalveandpressuregagemountings,asshowninFig.1.Thegageshallreadfrom0to7MPa(0to1000psi)andbemountedsoastobevisibleatsomedistance.4.3BoosterPump—Anair-operatedhydraulic(water)pres-surepump,capableof...
