ASTM D3523-1992(2007) 液体和固体的自然热值标准试验方法(差示麦克法)

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【英文标准名称】:StandardTestMethodforSpontaneousHeatingValuesofLiquidsandSolids(DifferentialMackeyTest)
【原文标准名称】:液体和固体的自然热值标准试验方法(差示麦克法)
【标准号】:ASTMD3523-1992(2007)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:D02.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:石油产品;固体;热值;液体;试验
【英文主题词】:DifferentialMackeyTest;liquids;solids;spontaneousheating;spontaneousheatingvalues
【摘要】:Thespontaneousheatingvalueofasubstanceisameasureoftheabilityofthatsubstancetoundergoself-heatingreactionswhilesupportedbycellulosicorotherfibrousmaterialinair.Itisanindexoftheautoignitiontendencyofthesubstanceundersuchconditions.1.1Thistestmethodcoversthenon-adiabaticdeterminationofthespontaneousheatingvalues(SHV)ofliquidsandsolids.Itisapplicabletosubstancesthatarenotcompletelyvolatileatthetesttemperature.Spontaneousheatingvaluesobtainedbythistestmethodarequalitativeindicationsofthedegreeofself-heatingthatmaybeexpectedtooccuruponexposureofthesampletoairatthetesttemperature.1.2Valuesobtainedbythismethodareapplicabletoliquidsandsolidssupportedoncellulosicsurfaces.Theyarenotapplicabletoliquidsonmetalsurfaces,oncontaminatedsurfaces,oratpressuresaboveatmospheric.1.3Spontaneousheatingvaluesdeterminedbythepresenttestmethodareregardedonlyasqualitativemeasurementsofself-heatingwhichoccursundertheconditionsofthetest.Thetestmethoddoesnotpurporttoproduceaquantitativemeasureoftheenthalpyofreactionofthesamplewithairatagiventesttemperature.Suchdatacanbeobtainedbytheuseofanadiabaticcalorimeter.Theexistence,underthetestconditions,ofapositivetemperaturedifferencebetweenthesampleandthereferenceisevidenceofathermochemicalreactioninthesample.1.4Themagnitudeofthemeasuredtemperaturedifferenceisasemiquantitativeindicationoftheenthalpyandrateofthatreaction.Sincefactorssuchasheatlossfromthesampletothebathandquenchingofthereactionduetotoorapidconsumptionofoxygenaffecttheamountanddurationofthemeasuredheateffect,caremustbetakennottoattributetoomuchquantitativesignificancetothetestresults.Itissufficient,forthepurposeofthistest,todeterminewhetherornotthesampleiscapableofundergoingaself-heatingreactionofsufficientmagnitudeandrapiditytoproduceadetectablethermaleffect.Thespontaneousheatingvalue(SHV)canbelowerthanthetesttemperature.Anegativeresultdoesnotprecludespontaneousheatinginitiatingatatemperaturehigherthanthetesttemperature.1.5Thisstandardshouldbeusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditionsandshouldnotbeusedtodescribeorappraisethefire-hazardorfire-riskofmaterials,products,orassembliesunderactualfireconditions.However,resultsofthistestmaybeusedaselementsofafire-hazardassessmentorafire-riskassessmentwhichtakesintoaccountallofthefactorswhicharepertinenttoanassessmentofthefirehazardorfireriskofaparticularenduse.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Incaseswherematerials,productsorequipmentareavailableininch-poundunitsonly,SIunitsareomitted.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A54
【国际标准分类号】:75_160_01
【页数】:4P.;A4
【正文语种】: