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【英文标准名称】:StandardTestMethodforRoomFireTestofWallandCeilingMaterialsandAssemblies
【原文标准名称】:墙壁和天花板材料及组件的房屋着火试验的标准试验方法
【标准号】:ASTME2257-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:carbondioxide;carbonmonoxide;corner;fire;fire-testresponse;flame;heatrelease;heatreleaserate;ignition;opticaldensity;oxygenconsumptioncalorimetry;room;smokeobscuration;toxicgases;Ceilingsuspensionsystems;Firetesti
【摘要】:Thisfiretestisapplicabletoadescriptionofcertainfireperformancecharacteristicsinappraisingwallandceilingmaterials,products,orsystemsunderspecifiedfire-exposureconditionsinanenclosure.Thetestindicatesthemaximumextentoffiregrowthinaroom,therateofheatrelease,andiftheyoccur,thetimetoflashover,andthetimetoflameextensionbeyondthedoorwayfollowingflashover.Itdeterminestheextenttowhichthewallandceilingmaterialsorassembliescontributetofiregrowthinaroomandthepotentialforfirespreadbeyondtheroom,undertheparticularconditionssimulated.Itdoesnotmeasurethecontributionoftheroomcontents.(SeeAppendixX1,Commentary.)Note18212;Timetoflashoverisdefinedhereinaseitherthetimewhentheradiantfluxontothefloorexceeds20kW/m2ortheaveragetemperatureoftheupperhotgaslayerreaches600x00B0;C(1100x00B0;F)orflamesexitthedoorwayorspontaneousignitionofapapertargetontheflooroccurs.Thespontaneousignitionofacrumpledsinglesheetofnewspaperplacedonthefloor0.9m(3ft)outfromthecenteroftherearwallprovidesavisualindicationofflashover.Thepotentialforthespreadoffiretootherobjectsintheroom,remotefromtheignitionsource,isevaluatedbymeasurementsof:(a)thetotalheatfluxincidentonthecenterofthefloor,and(b)acharacteristicupperlevelgastemperatureintheroom.Thepotentialforthespreadoffiretoobjectsoutsidetheroomoforiginisevaluatedbythemeasurementoftherateofheatreleaseofthefire.Measurementsoftherateofproductionofcarbonmonoxide,carbondioxide,andvisiblesmokearetaken.Theoverallperformanceofthetestspecimenisvisuallydocumentedbyfull-colorphotographicrecords.Videotapingofthecompletefiretestisanacceptablealternativetothephotographicrecord.Suchrecordsshowwheneachareaofthetestspecimenbecomesinvolvedinthefire.Inthisprocedure,thespecimensaresubjectedtoaspecificsetoflaboratoryfiretestexposureconditions.Ifdifferenttestconditionsaresubstitutedortheanticipatedend-useconditionsarechanged,itisnotknownwhetheritispossiblebyuseofthistesttopredictchangesintheperformancecharacteristicsmeasured.Therefore,theresultsarestrictlyvalidonlyforthefiretestexposureconditionsdescribedinthisprocedure.1.1Thisisafire-test-responsestandard.1.2Thistestmethodisintendedtoevaluate,underspecifiedfire-exposureconditions,thecontributiontoroomfiregrowthprovidedbywallorceilingmaterialsandassemblies,orboth.Themethodisnotintendedtoevaluatethefireenduranceofassembliesorfiresoriginatinginthewallassembly.Themethodprovidesameanstoevaluatetheeffectivenessofthermalbarriersinrestrictingthecontributionofcombustiblematerialsinthewallassemblytofiregrowthinaroomfire.1.3Thistestmethod,simulatingafireinthecornerofa2420by3630mm(8by12ft)roomcontainingasingleopendoorway,providesameanstoevaluatetherelativeperformanceofspecifiedwallandceilingmaterialsorassemblieswhentheyareusedtogetherinthesamerelationshipwithinanenclosure,andsimulatingthemannerinwhichtheywillbeused.1.4Thistestmethodisintendedtoevaluatethecontributiontofiregrowthprovidedbyasurfaceproductusingaspecifiedignitionsource.Itshall,however,benotedthatthetype,positionandheatoutputoftheignitionsourcewillconsiderablyinfluencefiregrowth.Thethermalexposureconditionsfromtheignitionsourcespecifiedinthismethodwillres......
【中国标准分类号】:P16
【国际标准分类号】:13_220_50
【页数】:19P.;A4
【正文语种】:英语