ANSI/ASHRAE 125-1992 HVAC系统中液流热能测试方法
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【英文标准名称】:MethodofTestingThermalEnergyMetersforLiquidStreamsinHVACSystems
【原文标准名称】:HVAC系统中液流热能测试方法
【标准号】:ANSI/ASHRAE125-1992
【标准状态】:现行
【国别】:美国
【发布日期】:1992
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑物服务设施;测试方法;空调
【英文主题词】:Airconditioning;Serviceinstallationsinbuildings;Testmethods
【摘要】:Thepurposeofthisstandardistoprovideamethodoftestingfactory-assembledthermalenergymetersusedtomeasurethethermaladdedtoorextractedfromaliquidstreamsupplyinganHVACsystem.
【中国标准分类号】:J73
【国际标准分类号】:91_140_30
【页数】:
【正文语种】:英语
【英文标准名称】:Workplaceairquality-Determinationoftotalorganicisocyanategroupsinairusing1-(2-methoxyphenyl)piperazineandliquidchromatography
【原文标准名称】:工作场所空气质量.用2-(1-甲氧基苯基)呱嗪和液相色谱法测定空气中的异氰酸盐总量
【标准号】:ISO16702-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-12
【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/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:空气;空气污染;空气质量;化学分析和试验;色谱法;解吸;含量测定;扩散取样器;异氰酸酯;液相色谱法;哌嗪;质量;取样;采样设备;技术数据单;工作地点;工作场所安全
【英文主题词】:Air;Airpollution;Airquality;Chemicalanalysisandtesting;Chromatography;Desorption;Determinationofcontent;Diffusivesamplers;Isocyanates;Liquidchromatography;Piperazine;Quality;Sampling;Samplingequipment;Technicaldatasheets;Workingplaces;Workplacesafety
【摘要】:ThisInternationalStandardgivesgeneralguidanceforthesamplingandanalysisofairborneorganicisocyanate(NCO)compoundsinworkplaceair.ThisInternationalStandardisappropriateforawiderangeoforganiccompoundscontainingisocyanatefunctionalgroups,includingisocyanatemonomersandprepolymers.Examplesofaromaticmonomersincludetoluenediisocyanate(TDI)(both2,4-and2,6-diisocyanatotoluene),naphthyldiisocyanate(NDI)(1,5-diisocyanatonaphthalene)andmethylenebis(4-phenylisocyanate)[MDI,systematicallynamedasdi-(4-isocyanatophenyl)methane].Examplesofaliphaticmonomersincludeisophoronediisocyanate(IPDI,systematicallynamedas1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane),methylenebis(cyclohexylisocyanate)(hydrogenatedMDI,HMDI)and1,6-diisocyanatohexane(HDI)(alsoknownas1,6-hexamethylenediisocyanate).Monomerscontainingasingleisocyanatemoiety(e.g.methylisocyanate,ethylisocyanate,phenylisocyanate,hexylisocyanate)areproducedduringthermaldegradationofpolyurethanes,i.e.flamebondingandlasercutting.Isocyanatepolymers,alsocalledpolyisocyanates,homopolymers,oligomersorprepolymers,arederivedfromthediisocyanatemonomersbyself-condensationorreactionwithpolyols.Polymericdiisocyanatesarewidelyusedinthepolyurethanes,paintsandcoatings,andadhesivesindustries.ThisInternationalStandardisappropriateformeasuringanyproductcontainingfreeisocyanategroups.ItwasdevelopedprimarilyforthecommonlyusedMDI,HDI,andTDI,andtheiroligomersandpolymers[1].IthasalsobeenusedforIPDI,HMDI,andNDI,andtheiroligomersandpolymers.TheexposurelimitforisocyanatesintheUKrequiresmeasurementoftotalisocyanategroups,i.e.monomericdiisocyanates,oligomeric,prepolymericandpolymericdiisocyanatesandmonoisocyanates.Becausethereareawiderangeofisocyanatestructuresandmolecularmasses,thechromatographicconditionsusedwillneedtobevariedaccordingtotheisocyanateformulationbeingdetermined.Ifbothisocyanatesandaminesarebelievedtobepresent,andbothneedtobedetermined,astandardwhichenablesthesimultaneousdeterminationofbothaminesandisocyanatesmaybemoreappropriate[2].Thismethodhasalsobeenmodifiedtoallowdeterminationofmono-isocyanatesproducedduringthermaldegradation[3],theuseofmassspectrometricdetection[4]andothersamplingequipment,e.g.37mmfiltersandotherfiltercassettes,butthesemodificationsarenotcoveredinthisInternationalStandard.Ifamodifiedversionofthismethodisbeingused,itistheresponsibilityoftheusertodemonstratethatthemodificationsarevalid.Themethodisusedtodeterminetime-weightedaverageconcentrationsoforganicisocyanatesinworkplaceatmospheres,andissuitableforsamplingoverperiodsintherange0,5minto8h.Themethodisdesignedforpersonalmonitoring,butcanalsobeusedforfixedlocationmonitoringbysuitablemodification.Themethodissuitableforthemeasurementofairborneorganicisocyanatesintheconcentrationrangefromapproximately0,1μg/m3to140μg/m3fora15lsamplevolume.Thequalitativeandquantitativedetectionlimitsforisocyanate,definedasthreetimesand10timesthestandarddeviationofsixblankdeterminations,havebeenfoundtobetypicallybetween0,001μgand0,004μgofisocyanatepersample,respectively(ECdetection).Fora15lairsample,thesevaluescorrespondtoqualitativeandquantitativedetectionlimitsof0,07μg/m3and0,3μg/m3,respectively.
【中国标准分类号】:C70
【国际标准分类号】:13_040_30
【页数】:35P;A4
【正文语种】:英语
【英文标准名称】:SpecificationforWroughtAlloySteelRollsforColdandHotReduction
【原文标准名称】:冷轧和热轧用锻制合金钢辊规范
【标准号】:ANSI/ASTMA427-1996
【标准状态】:现行
【国别】:美国
【发布日期】:1996-10
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:配件;钢
【英文主题词】:steels;fittings
【摘要】:Thisspecificationcovershomogeneouswroughthardenedalloysteelrollsforuseincoldorhotreductionofflatrolledferrousandnonferrousproducts.
【中国标准分类号】:H44
【国际标准分类号】:77_140_99
【页数】:
【正文语种】:英语
