【英文标准名称】:StandardTestMethodforMeasurementofMassLossandIgnitabilityforScreeningPurposesUsingaConicalRadiantHeater
【原文标准名称】:使用圆锥辐射加热器测量屏蔽用质量损耗和可燃性的标准试验方法
【标准号】:ASTME2102-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E05.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coneheater;fire;fire-test-responsecharacteristic;heatrelease;ignitability;massloss;Conicalradiantheater;Fire-testresponse;Heatflux;Ignition--buildingmaterials;Masslosstesting;Radiantenergy;Screenanalysis
【摘要】:Thistestmethodprovidesameansforscreeningmaterials,products,orassemblies,forthemassloss,andignitabilitytheyexhibitunderspecifiedheatfluxexposureconditions.Asanoption,thetestmethodisalsosuitableforscreeningfortheheatreleased,byusingathermopilemethod(SeeAnnexA2).TerminologyE176,onfirestandards,statesthatfire-test-responsecharacteristicsincludeeaseofignitionandmassloss(bothmeasuredinthistestmethod),aswellasflamespread,smokegeneration,fireendurance,andtoxicpotencyofsmoke.Themasslossrateofamaterial,product,orassemblyisafire-test-responsecharacteristicthatgivesanindicationofitsburningrate.Thus,alowermasslossrateisoftenassociatedwithslowerburning.Note,however,thatmasslossisnotalwaysaresultofcombustion,andthatthismethoddoesnotassessreleaseofsmokeorcombustionproducts.Thetimetoignitionofamaterial,product,orassemblyisafire-test-responsecharacteristicthatgivesanindicationofitspropensitytoigniteattheappliedheatfluxlevelandsubsequentlytoreleaseheatandspreadflameoveritssurface.Thus,alongertimetoignitionisanindicationofalowerpropensityforthematerial,product,orassemblytobecomeinvolvedandcontributetofirespreadorgrowth;howeverthismethoddoesnotassessthesmokeorcombustionproductsreleased.Theapparatususedforthistestmethodissuitabletoassessthecriticalheatfluxforignitionofthematerials,products,orassembliestested,byassessingignitabilityatvariousheatfluxes(seeAppendixX3forguidance).Valuesdeterminedbythistestarespecifictothespecimenintheformandthicknesstestedandarenotinherentfundamentalpropertiesofthematerial,product,orassemblytested.Thus,closelyrepeatableorreproducibleexperimentalresultsarenottobeexpectedfromthistestmethodwhentestsareconductedforagivenmaterial,product,orassembly,whileintroducingvariationsinpropertiessuchasspecimenthicknessordensity.Noincidentirradianceisspecifiedinthistestmethod.Theinstrumentiscapableofgeneratingirradiancesrangingupto100kW/m2.Thechoiceofirradianceisafunctionoftheapplicationofthematerial,product,orassemblytobetested,andofthefirescenariotheuserisinvestigating.However,themethodisnotsuitableforincidentirradiancesbelow10kW/m3(see5.7.3).Themethodusedforoptionallymeasuringheatrelease,athermopile,isnotasaccurateastheconventionaloxygenconsumptioncalorimetrymethod,usedintheconecalorimeter,TestMethodE1354,initsapplicationsstandards,suchasTestMethodE1474andE1740,orinintermediatescaleoralargescalecalorimetrytestmethods,suchasTestMethodsE1623,E1537,E1590orD5537(seealsoAnnexA2).Ontheotherhandthethermopilemethodofassessingheatreleasehasbeenusedextensivelybecauseofitssimplicity,includingTestMethodE906,andotherapplicationsdiscussedinGuide