NF C23-560-4-2005 可燃气体的检测和测量用电气设备.第4部分:指示低爆炸物极限的体积百分率最大为100%的II类设备的性能要求
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【英文标准名称】:Electricalapparatusforthedetectionandmeasurementofflammablegases-Part4:performancerequirementsforgroupIIapparatusindicatingavolumefractionupto100%lowerexplosivelimit.
【原文标准名称】:可燃气体的检测和测量用电气设备.第4部分:指示低爆炸物极限的体积百分率最大为100%的II类设备的性能要求
【标准号】:NFC23-560-4-2005
【标准状态】:现行
【国别】:法国
【发布日期】:2005-01-01
【实施或试行日期】:2005-01-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:工作性能;燃烧气体;电驱动装置;测量;电气工程;规范(验收);气体;可燃性环境;电气设备
【英文主题词】:Burninggases;Electricappliances;Electricalappliances;Electricalengineering;Electrically-operateddevices;Flammableatmospheres;Gases;Measurement;Performanceinservice;Specification(approval)
【摘要】:
【中国标准分类号】:N50
【国际标准分类号】:13_320;17_060;29_260_20
【页数】:17P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforLengthChangeofHardenedHydraulic-CementMortarandConcrete
【原文标准名称】:硬化水泥灰浆和混凝土长度变化的标准试验方法
【标准号】:ASTMC157/C157M-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】:C09.68
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:lengthchange;mortarconcrete;Cementmortars;Changeinlength;Hardenedconcrete;Hydrauliccementconcrete;Volumetricmeasurement--cement/concrete
【摘要】:Measurementoflengthchangepermitsassessmentofthepotentialforvolumetricexpansionorcontractionofmortarorconcreteduetovariouscausesotherthanappliedforceortemperaturechange.Thistestmethodisparticularlyusefulforcomparativeevaluationofthispotentialindifferenthydraulic-cementmortarorconcretemixtures.Thistestmethodprovidesusefulinformationforexperimentalpurposesorforproductsthatrequiretestingundernonstandardmixing,placing,handling,orcuringconditions,suchashighproductworkabilityordifferentdemoldingtimes.Standardconditionsaredescribedin5.4.1.Ifconditionsformixing,curing,sampling,andstorageotherthanspecifiedinthistestmethodarerequired,theyshallbereportedbutarenottobeconsideredasstandardconditionsofthistestmethod.Nonstandardconditionsandthereasonsfordeparturefromstandardconditionsshallbereportedclearlyandprominentlywithcomparatorvalues.DESIG:C157/C157M08^TITLE:StandardTestMethodforLengthChangeofHardenedHydraulic-CementMortarandConcrete^SIGNUSE:Measurementoflengthchangepermitsassessmentofthepotentialforvolumetricexpansionorcontractionofmortarorconcreteduetovariouscausesotherthanappliedforceortemperaturechange.Thistestmethodisparticularlyusefulforcomparativeevaluationofthispotentialindifferenthydraulic-cementmortarorconcretemixtures.Thistestmethodprovidesusefulinformationforexperimentalpurposesorforproductsthatrequiretestingundernonstandardmixing,placing,handling,orcuringconditions,suchashighproductworkabilityordifferentdemoldingtimes.Standardconditionsaredescribedin5.4.1.Ifconditionsformixing,curing,sampling,andstorageotherthanspecifiedinthistestmethodarerequired,theyshallbereportedbutarenottobeconsideredasstandardconditionsofthistestmethod.Nonstandardconditionsandthereasonsfordeparturefromstandardconditionsshallbereportedclearlyandprominentlywithcomparatorvalues.^SCOPE:1.1Thistestmethodcoversthedeterminationofthelengthchangesthatareproducedbycausesotherthanexternallyappliedforcesandtemperaturechangesinhardenedhydraulic-cementmortarandconcretespecimensmadeinthelaboratoryandexposedtocontrolledconditionsoftemperatureandmoisture.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Anexceptioniswithregardtosievesizesandnominalsizeofaggregate,inwhichtheSIvaluesarethestandardasstatedinSpecificationE11.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.^REFERENCE:ASTMStandards:C125TerminologyRelatingtoConcreteandConcreteAggregatesC143/C143MTestMethodforSlumpofHydraulic-CementConcreteC172PracticeforSamplingFreshlyMixedConcrete【英文标准名称】:Ironores;determinationofvanadiumcontent;flameatomicabsorptionspectrometricmethods
【原文标准名称】:铁矿石钒含量的测定火焰原子吸收光谱法
【标准号】:ISO9684-1991
【标准状态】:作废
【国别】:国际
【发布日期】:1991-10
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC102
【标准类型】:()
【标准水平】:()
【中文主题词】:含量测定;化学分析和试验;光谱测定法;矿物;原子吸收分光光度测定法;钒;铁矿石;钒含量
【英文主题词】:Atomicabsorptionspectrophotometry;Chemicalanalysisandtesting;Determinationofcontent;Ironores;Minerals;Spectrometry;Vanadium;Vanadiumcontent
【摘要】:Specifiestwomethods:method1isapplicabletovanadiumcontentsbetween0,005%and0,05%,andmethod2tovanadiumcontentsbetween0,05%and0,5%.AnnexAformsanintegralpartofthisstandard.AnnexesBandCareforinformationonly.
【中国标准分类号】:D31
【国际标准分类号】:73_060_10
【页数】:11P;A4
【正文语种】:英语