DIN 19212-1991 流量测量技术.差压式测量仪和截流阀的螺纹接头
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【英文标准名称】:Flowmeasurement-Threadedjointsforshut-offvalvesanddifferentialpressureinstruments
【原文标准名称】:流量测量技术.差压式测量仪和截流阀的螺纹接头
【标准号】:DIN19212-1991
【标准状态】:作废
【国别】:德国
【发布日期】:1991-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:作标记;螺纹连接;连接;螺纹件;截止阀;压差传逆管;螺纹扣数;中径;螺纹孔;压差测量仪器;内螺纹;尺寸;压力计;螺纹栓塞;流量测量;连接尺寸;测量仪器;控制设备;测量设备
【英文主题词】:
【摘要】:
【中国标准分类号】:N12
【国际标准分类号】:17_120_10
【页数】:4P;A4
【正文语种】:德语
【英文标准名称】:Ambientairquality-StandardgravimetricmeasurementmethodforthedeterminationofthePM2,5massfractionofsuspendedparticulatematter
【原文标准名称】:环境空气质量.悬浮颗粒物质的PM2.5质量系数测定用标准称重测量法
【标准号】:BSEN14907-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-11-11
【实施或试行日期】:2005-11-11
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:空气污染;空气净化;空气质量;环境空气;定义;测定;尘埃;称重测量法;重量分析法;维修;质量浓度;测量;测量不确定度;测量仪器;颗粒;颗粒物质的测定;质量保证;质量控制;基准测量方法;抽样方法;悬浮尘埃;称重
【英文主题词】:Airpollution;Airpurification;Airquality;Ambientair;Definitions;Determination;Dust;Gravimetric;Gravimetry;Maintenance;Massconcentration;Measurement;Measuringincertainity;Measuringinstruments;Particles;Particulatemattermeasurement;Qualityassurance;Qualitycontrol;Referencemeasuringmethods;Samplingmethods;Suspendeddust;Weighing
【摘要】:ThisEuropeanStandarddescribesastandardmethodfordeterminingthePM2,5massconcentrationofsuspendedparticulatematterinambientairbysamplingtheparticulatematteronfiltersandweighingthembymeansofabalance.Measurementsaremadeoverasamplingperiodofabout24h,andinlinewiththeDirective,areexpressedasμg/m3,wherethevolumeofairisthevolumeatambientconditionsneartheinletatthetimeofsampling.Therangeofapplicationofthestandardisfrom1μg/m3(i.e.thelimitofdetectionofthestandardmeasurementmethodexpressedasitsuncertainty)upto120μg/m3(i.e.themaximumconcentrationlevelobservedduringthefieldstudyundertakenbyCEN/TC264/WG15tovalidatethestandard).NOTEAlthoughthestandardisnotvalidatedforconcentrationsover120μg/m3,itsrangeofapplicationcouldwellbeextendedtocommonlyencounteredambientconcentrationsuptocirca200μg/m3whenusingglassorquartzfibrefilters.Atthesehighconcentrationsandparticulatemassloadingsnofiltercloggingistobeexpected.Alsotheflowratecanbeeasilymaintainedatthenominalsetting.TheequivalenceprocedureinAnnexAspecifiestwoapproaches,dependingonwhetherthecandidatemethoddiffersslightlyorfundamentallyfromthestandardmethod.Intheformercase,involvingonlyslightdifferencesfromthestandardmethod(“variationsonatheme”)AnnexAprovidesarestrictedproceduretocompareonlythepertinentdifferences,insteadofafullfieldtest.Thispartoftheannexservestogivepracticalguidancefordeterminingequivalenceformeasurementmethodscommonlyusedinmonitoringnetworks,andincludesexamplesofcommonvariationstothestandardmethod,suchasdifferentfilterstoringorconditioningproceduresandthevariationofthestandardmethodfortheapplicationasautomatedfilterchanger.Inthelattercase,involvingafullsetoffieldtests,theprocedureservestodetermineequivalenceonlywithintherangeofconditionsunderwhichthefieldtestsarecarriedout.TheequivalencecanbeshowntoholdforconditionsprevailingwithinEuropeancountriesbycarryingoutthefieldtestinsituationscoveringasuitablerangeofrelevantambientparameters(suchasconcentrationandcompositionofthesuspendedparticulatematter,temperature,andhumidity).AlthoughthisEuropeanStandarddoesnotexplicitlyaddressautomaticmonitoringmethodsforthemeasurementofthePM2,5massfractioninambientair,theequivalencetestprocedureinAnnexAappliesbothtonon-automaticandautomaticmethods.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:32P;A4
【正文语种】:英语
【英文标准名称】:TestMethodforDistillationofPetroleumProductsatReducedPressures(05.01)
【原文标准名称】:石油产品减压蒸馏试验方法
【标准号】:ANSI/ASTMD1160-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:蒸馏;试验;石油产品
【英文主题词】:testing;distillation;petroleumproducts
【摘要】:
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:
【正文语种】:英语