标准资料网-标准资料免费资源平台

【英文标准名称】:StandardSpecificationforPipingFittingsofWroughtCarbonSteelandAlloySteelforLow-TemperatureService
【原文标准名称】:低温设备用锻制碳素钢和合金钢管配件标准规范
【标准号】:ASTMA420/A420M-2001
【标准状态】:作废
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:管;钢;管道配件
【英文主题词】:pipes;pipefittings;steels
【摘要】:
【中国标准分类号】:H48
【国际标准分类号】:23_040_40
【页数】:6P;A4
【正文语种】:英语


【英文标准名称】:Airquality-Determinationofodourconcentrationbydynamicolfactometry
【原文标准名称】:空气质量.用动态气味测定法测定气味浓度
【标准号】:BSEN13725-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-05-15
【实施或试行日期】:2003-05-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThisEuropeanStandardspecifiesamethodfortheobjectivedeterminationoftheodourconcentrationofagaseoussampleusingdynamicolfactometrywithhumanassessorsandtheemissionrateofodoursemanatingfrompointsources,areasourceswithoutwardflowandareasourceswithoutoutwardflow.TheprimaryapplicationistoprovideacommonbasisforevaluationofodouremissionsinthememberstatesoftheEuropeanUnion.ThisEuropeanStandardisapplicabletothemeasurementofodourconcentrationofpuresubstances,definedmixturesandundefinedmixturesofgaseousodorantsinairornitrogen,usingdynamicolfactometrywithapanelofhumanassessorsbeingthesensor.TheunitofmeasurementistheEuropeanodourunitpercubicmetre:ouE/m.Theodourconcentrationismeasuredbydeterminingthedilutionfactorrequiredtoreachthedetectionthreshold.Theodourconcentrationatthedetectionthresholdisbydefinition1ouE/m.Theodourconcentrationisthenexpressedintermsofmultiplesofthedetectionthreshold.Therangeofmeasurementistypicallyfrom10ouE/mto10ouE/m(includingpre-dilution).ThefieldofapplicationofthisEuropeanStandardincludes:—themeasurementofthemassconcentrationatthedetectionthresholdofpureodoroussubstancesing/m;—themeasurementoftheodourconcentrationofmixturesofodorantsinouE/m;—themeasurementoftheemissionrateofodorousemissionsfrompointsourcesandsurfacesources(withandwithoutanoutwardflow),includingpre-dilutionduringsampling;—thesamplingofodorantsfromemissionsofhighhumidityandtemperature(upto200℃);—thedeterminationofeffectivenessofend-of-pipedevicesusedtoreduceodouremissions.Thecharacterisationofodouremissionsrequiresdetailedmeasurementofthegasvelocity,thatshallbeperformedaccordingtotherelevantstandardsincludedinthenormativereferences.ThisEuropeanStandardisnotapplicableto:—themeasurementofodourspotentiallyreleasedbyparticlesofodoroussolidsordropletsofodorousfluidssuspendedinemissions;—themeasuringstrategytobeappliedincaseofvariableemissionrates;—themeasurementoftherelationshipbetweenodourstimulusandassessorresponseabovedetectionthreshold;—directmeasurementofhedonictone(or(un)pleasantness)ordirectassessmentofpotentialannoyance;—fieldpanelmethods;—measurementofrecognitionthresholds;—measurementofidentificationthresholds.Althoughtheultimateapplicationofodourmeasurementisinreducingodournuisance,therelationbetweenmeasuredthresholdsofodouraccordingtothisstandardandtheoccurrenceofodournuisanceishighlycomplex.Itisprofoundlyinfluencedbytheatmosphericprocessesdeterminingthedispersionofodours,thequalityoftheodour(hedonictone)andfinallybythereceptorcharacteristicsofthoseexposedtotheodour.Thesecharacteristicsnotonlyvarystronglybetweenindividuals,butalsointimewithinoneindividual.Therelationbetweenemissions,dispersion,exposureandannoyanceisnotwithinthescopeofthisEuropeanStandard.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_99
【页数】:74P;A4
【正文语种】:英语