ASTM E659-1978(2005) 液体化学品自燃温度的试验方法

作者:标准资料网 时间:2024-04-29 17:34:02  浏览:8112   来源:标准资料网

【英文标准名称】:StandardTestMethodforAutoignitionTemperatureofLiquidChemicals
【原文标准名称】:液体化学品自燃温度的试验方法
【标准号】:ASTME659-1978(2005)
【标准状态】:现行
【国别】:
【发布日期】:1978
【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】:E27.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:药液;温度;试验
【英文主题词】:
【摘要】:Autoignition,byitsverynature,isdependentonthechemicalandphysicalpropertiesofthematerialandthemethodandapparatusemployedforitsdetermination.Theautoignitiontemperaturebyagivenmethoddoesnotnecessarilyrepresenttheminimumtemperatureatwhichagivenmaterialwillself-igniteinair.Thevolumeofthevesselusedisparticularlyimportantsincelowerautoignitiontemperatureswillbeachievedinlargervessels.(SeeAppendixX2.)Vesselmaterialcanalsobeanimportantfactor.Thetemperaturesdeterminedbythistestmethodarethoseatwhichairoxidationleadstoignition.Thesetemperaturescanbeexpectedtovarywiththetestpressureandoxygenconcentration.Thistestmethodisnotdesignedforevaluatingmaterialswhicharecapableofexothermicdecomposition.Forsuchmaterials,ignitionisdependentuponthethermalandkineticpropertiesofthedecomposition,themassofthesample,andtheheattransfercharacteristicsofthesystem.Thistestmethodcanbeemployedforsolidchemicalswhichmeltandvaporizeorwhichreadilysublimeatthetesttemperature.Nocondensedphase,liquidorsolid,shouldbepresentwhenignitionoccurs.Thistestmethodisnotdesignedtomeasuretheautoignitiontemperatureofmaterialswhicharesolidsorliquidsatthetesttemperature(forexample,wood,paper,cotton,plastics,andhigh-boilingpointchemicals).Suchmaterialswillthermallydegradeintheflaskandtheaccumulateddegradationproductsmayignite.Thistestmethodwasdevelopedprimarilyforliquidchemicalsbuthasbeenemployedtotestreadilyvaporizedsolids.Responsibilityforextensionofthismethodtosolidsofunknownthermalstability,boilingpoint,ordegradationcharacteristicsrestswiththeoperator.1.1Thistestmethodcoversthedeterminationofhot-andcool-flameautoignitiontemperaturesofaliquidchemicalinairatatmosphericpressureinauniformlyheatedvessel.Note18212;Withincertainlimitations,thistestmethodcanalsobeusedtodeterminetheautoignitiontemperatureofsolidchemicalswhichreadilymeltandvaporizeattemperaturesbelowthetesttemperature.1.2Thisstandardshouldbeusedtomeasureanddescribethepropertiesofmaterials,products,orassembliesinresponsetoheatandflameundercontrolledlaboratoryconditionsandshouldnotbeusedtodescribeorappraisethefirehazardorfireriskofmaterials,products,orassembliesunderactualfireconditions.However,resultsofthistestmaybeusedaselementsofafireriskassessmentwhichtakesintoaccountallofthefactorswhicharepertinenttoanassessmentofthefirehazardofaparticularenduse.
【中国标准分类号】:C80
【国际标准分类号】:
【页数】:6P.;A4
【正文语种】: