ANSI/ASTM D2879-1997 用液体蒸气压力计测定液体的蒸气压力-温度关系和初始分解温度的试验方法

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【英文标准名称】:TestMethodforVaporPressure-temperatureRelationshipandInitialDecompositionTemperatureofLiquidsbyIsoteniscope
【原文标准名称】:用液体蒸气压力计测定液体的蒸气压力-温度关系和初始分解温度的试验方法
【标准号】:ANSI/ASTMD2879-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:变坏;液体;润滑剂;石油产品;温度;测试;蒸气压力
【英文主题词】:Deterioration;Liquids;Lubricants;Petroleumproducts;Temperature;Testing;Vapourpressure
【摘要】:Thistestmethodcoversthedeterminationofthevaporpressureofpureliquids,thevaporpressureexertedbymixturesinaclosedvesselat405%ullage,andtheinitialthermaldecompositiontemperatureofpureandmixedliquids.Itisapplicabletoliquidsthatarecompatiblewithborosilicateglassandthathaveavaporpressurebetween133Pa(1.0torr)and101.3kPa(760torr)attheselectedtesttemperatures.Thetestmethodissuitableforuseovertherangefromambientto748K.Thetemperaturerangemaybeextendedtoincludetemperaturesbelowambientprovidedasuitableconstant-temperaturebathforsuchtemperaturesisused.Theisoteniscopeisaconstant-volumeapparatusandresultsobtainedwithitonotherthanpureliquidsdifferfromthoseobtainedinaconstant-pressuredistillation.Mostpetroleumproductsboiloverafairlywidetemperaturerange,andthisfactshallberecognizedindiscussionoftheirvaporpressures.EvenanidealmixturefollowingRaoult'slawwillshowaprogressivedecreaseinvaporpressureasthelightercomponentisremoved,andthisisvastlyaccentuatedincomplexmixturessuchaslubricatingoilscontainingtracesofdewaxingsolvents,etc.Suchamixturemaywellexertapressureinaclosedvesselofasmuchas100timesthatcalculatedfromitsaveragecomposition,anditistheclosedvesselwhichissimulatedbytheisoteniscope.Formeasurementoftheapparentvaporpressureinopensystems,TestMethodD2878,isrecommended.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,see6.5,6.10,and6.12.
【中国标准分类号】:E30
【国际标准分类号】:75_100
【页数】:
【正文语种】:英语