BS ISO 31-0-2004 量和单位.一般原则
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【英文标准名称】:Quantitiesandunits-Generalprinciples
【原文标准名称】:量和单位.一般原则
【标准号】:BSISO31-0-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-07-16
【实施或试行日期】:2004-07-16
【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】:总论;测量单位;单位;尺寸
【英文主题词】:Generalsection;Size;Units;Unitsofmeasurement
【摘要】:Givesgeneralinformationaboutprinciplesconcerningphysicalquantities,equations,quantityandunitsymbols,andcoherentunitsystems,especiallytheInternationalSystemofUnits,SI,includingrecommendationsforprintingsymbolsandnumbers.AnnexAincludesaguidetotermsusedinnamesforphysicalquantities,AnnexBaguidetotheroundingofnumbers,AnnexCinternationalorganizationsinthefieldofquantitiesandunits.
【中国标准分类号】:A51
【国际标准分类号】:01_060
【页数】:28P;A4
【正文语种】:英语
【英文标准名称】:Plastics-Instrumentaldeterminationofradiantexposureinweatheringtests-Generalguidanceandbasictestmethod
【原文标准名称】:塑料制品.风化试验辐射暴露度的仪器测定.一般指南和基本试验方法
【标准号】:BSISO9370-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-12-15
【实施或试行日期】:1997-12-15
【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】:准确度;稳定性;湿度;太阳辐射;试验设备;工作范围;塑料;环境试验;加速度试验;辐射计;波长;分辨率;响应时间;自然采光;校正;紫外线辐射;实验室试验;温度;辐射测量
【英文主题词】:Definition;Definitions;Determination;Effects;Environmentaltesting;Generalconditions;Irradiation;Plastics;Radiation;Solarradiation;Tests;Weathering
【摘要】:1ThisInternationalStandardspecifiesmethodsfortheinstrumentalmeasurementofirradianceonaplanarsurface.Thisincludesbothnaturalandsimulatednaturalexposuretesting.2Instrumentaltechniquesincludethecontinuousmeasurementoftotalsolarandspectralsolarirradiance(withemphasisontheultravioletwavelengthregion),andtheaccumulation(orintegration)ofinstantaneousdatatoprovideatotalradiantexposure(dosage).3Exposureinapparatususingartificiallightsourcessometimesrequiresmeasurementofirradianceandradiantexposureatspecifiedwavelengthsinordertomonitorand,ifrequired,controltheirradianceonaplanarsurfaceand/ortodefinequantitativelytheexposurestagesofanexposedspecimen.Typically,measurementsofradiationinthe290nmto400nmband,ornarrow-bandmeasurementswithcentrewavelengthsat,forexample,340nmor420nm,arerequired.However,incontrasttonaturalexposureconditions,radiationofwavelengthsshorterthan300nmispresentinmostlightsourcesusedinlaboratoryacceleratedtests,andisknowntocauserapiddegradationinmanypolymers.Inaddition,radiationoflongerwavelengthscanbeveryimportantinproductdegradationsuchascolourfade.Therefore,itmaybeveryusefultomonitorshort-wavelengthradiationoflessthan300nmandlong-wavelengthradiationatwavelengthsgreaterthan400nm.4ThisInternationalStandarddoesnotspecifyproceduresusingbluewoolstandards,chemicalactinometry,monochromatorsorpolymericandotherfilmdosimetry.NOTE1Thisshouldnotbeconstruedtoimplythatsuchtechniquesareundesirable.Effortsareunderwayinseveralcountriestodeveloppolymericdosimetersforthispurpose.NOTE2Monochromatorsareusuallyusedinspectroradiometricsystemswherehigh-resolutionprecisionscanningofapassbandisrequired.5ThetotalsolarandsolarultravioletradiationmeasuringinstrumentsdescribedinthisInternationalStandardcanbeusedinthefollowingexposuretests:a)NaturalexposuretestsMeasurementoftotalsolarandsolarultravioletradiationusingtheinstrumentsandproceduresspecifiedinthisInternationalStandardwillimprovethecomparabilityofexposuretestsconductedatdifferenttimesinasinglelocation.Itmayalsoimprovethecomparabilityofresultsobtainedindifferentlocationswithsimilarclimates.However,comparisonofresultsfromexposuresindifferentlocationsmustalsoconsidertheeffectsoftemperature,moistureandotherclimaticfactorsonthetypeandrateofproductdegradationaswellasthelevelofsolarradiation.NOTE3Whiletheinstrumentperformancedatadescribedintables1and2maybeconsideredasaspecification,especiallyforinstrumentsthatmeasuretotalsolarradiation,instrumentscurrentlyavailableformeasurementofsolarultravioletradiationmaynotmeetalloftheperformancefeatureslisted.b)ComparisonbetweennaturalexposureandlaboratoryacceleratedtestsMeasurementsofultravioletand/orvisibleradiationusingtheinstrumentsandproceduresspecifiedinthisInternationalStandardmayaidincomparingresultsfromartificialacceleratedtestswiththosefromnaturalexposure.Whenthisisdone,comparisonshouldbemadeinseveralpassbands.Comparingtheradiationinashort-wavelengthUVpassbandisnecessarytogaugetherelativeseverityoftheexposureandtoestimatetheriskthattheacceleratedtestmightproducedegradationreactionsthatwouldnotoccurinanaturalexposure.Theintensityandspectraldistributionoftheradiationusedinacceleratedtestsisonlyonefactorindeterminingthecomparabilityofresultsobtainedinnaturalexposures.Onemustalsoconsidertemperature,moistureandotherclimaticfactors(notablypollutioneffects)whenmakingthesecomparisons.Becauseofdifferencesbetweenamaterial'sresponsetoincreasedradiationlevelsand
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:20P;A4
【正文语种】:英语
【英文标准名称】:SeamlessandWeldedCarbon,FerriticandAusteniticAlloySteelHeat-ExchangerTubeswithIntegralFins
【原文标准名称】:无缝与焊接碳素钢,铁素体钢与奥氏体钢制有整体散热片的换热器钢管
【标准号】:ASTMA498-1994
【标准状态】:作废
【国别】:美国
【发布日期】:1994
【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】:碳素钢;合金;奥氏体的;钢;焊接的;热交换器;管;铁铬;管道
【英文主题词】:alloys;carbonsteels;steels;pipes;heatexchangers;austenitic;welded;pipelines;ferritic
【摘要】:
【中国标准分类号】:H48
【国际标准分类号】:23_040_10;77_140_70
【页数】:
【正文语种】:英语
