Designation:C728−17StandardSpecificationforPerliteThermalInsulationBoard1ThisstandardisissuedunderthefixeddesignationC728;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversthecompositionandphysicalpropertiesforperlitethermalinsulationboardusedprincipallyabovestructuralroofdecksandasabaseforbuilt-up,modified,andelastomericmembraneroofinginbuildingconstruction.1.2Whenadoptedbyanauthorityhavingjurisdiction,codesthataddressfirepropertiesinmanyapplicationsregulatetheuseofthethermalinsulationmaterialscoveredbythisspeci-fication.Firepropertiesarecontrolledbyjob,project,orotherspecificationswherecodesorgovernmentregulationsdonotapply.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1Thefollowingstandards,oftheissueineffectonthedateofmaterialpurchase,formapartofthisspecificationtotheextentspecifiedherein:2.2ASTMStandards:2C165TestMethodforMeasuringCompressivePropertiesofThermalInsulationsC168TerminologyRelatingtoThermalInsulationC177TestMethodforSteady-StateHeatFluxMeasure-mentsandThermalTrans...
