Designation:C600−85(Reapproved2015)StandardTestMethodofThermalShockTestonGlassPipe1ThisstandardisissuedunderthefixeddesignationC600;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Sincethermalshockresistanceissocloselyrelatedtothelinearcoefficientofexpansion,thistestmethodforthedeterminationofthethermalshockresistanceofglassprocesspipeisprimarilyintendedtosupplementtestresultsonthelinearcoefficientofexpansion,TestMethodE228.Thisther-malshocktestwillnotordinarilybeperformedexceptinthosecaseswherethethermalshockresistancemaybequestioned.1.2Thistestmethodcoversonlytwooffourthermalshockpossibleapproaches,namelyindependentdownshockofout-sideandinsidepipesurfaces.Downshockismoreseveresinceahighertensilestressisproducedand,hence,morelikelytoproducefailure.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E228TestMethodforLinearThermalExpansionofSolidMaterialsWithaPush-RodDilatometer3.SignificanceandUse3.1Thistestmethodprovidesapracticalmeansofassessingglasspipestrengthundershort-duration,thermally-imposedtensilestresses.Inadditiontoaprincipalroleplayedbythelinearcoefficientofthermalexpansion,glasssurfacedefectscanalsobemajorfactorsinreducingdownshockperformance.4.Apparatus4.1Oven,equippedwithadevicetomaintainthetempera-turewith65°F(63°C)ofthespecifiedtemperature.Anindicatingcontrollerisrecommended.Otherwise,adialther-mometershouldbeattachedandth...
