【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】:
基本信息
| 标准名称： | 表盘及装饰用铝及铝合金板 |
| 英文名称： | Aluminium and aluminium alloy sheet for dial plates and ornaments |
| 中标分类： |
冶金 >>
有色金属及其合金产品 >>
轻金属及其合金 |
| 替代情况： | 调整为YS/T 242-1994 |
| 发布部门： | 国家标准局 |
| 发布日期： | 1983-04-16 |
| 实施日期： | 1984-02-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 平装16开， 页数：7， 字数：8000千字 |
适用范围
本标准适用于钟表、仪表的表盘和家有电器、广播电视、通讯设备等用的面板、装饰件以及各种标牌。
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所属分类： 冶金 有色金属及其合金产品 轻金属及其合金