SAE AMS3756 Moldings, Glass Fiber Filled Polytetrafluoroethylene (PTFE) 75% PTFE Resin, 25% Glass Fibers, as Sintered
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来源:标准资料网
Product Code:SAE AMS3756
Title:Moldings, Glass Fiber Filled Polytetrafluoroethylene (PTFE) 75% PTFE Resin, 25% Glass Fibers, as Sintered
Issuing Committee:Ams P Polymeric Materials Committee
Scope:This specification covers one grade of glass-fiber-filled polytetrafluoroethylene (PTFE) in the form of molded billets.
【英文标准名称】:Workplaceairquality-Determinationoftotalisocyanategroupsinairusing2-(1-methoxyphenyl)piperazineandliquidchromatography
【原文标准名称】:工作场所空气质量用2-(1-甲氧基)酸呱嗪和液相色谱法测定空气中的总异氰酸盐
【标准号】:ISO16702-2001
【标准状态】:作废
【国别】:国际
【发布日期】:2001-05
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:空气质量;取样;工作地点;色谱法;质量;哌嗪;异氰酸酯;采样设备;扩散样品;含量测定;空气;技术数据单;解吸;空气污染;化学分析和试验;液相色谱法;工作场所安全
【英文主题词】:
【摘要】:ThisInternationalStandardgivesgeneralguidanceforthesamplingandanalysisofairborneorganicisocyanatesinworkplaceair,usingthe2-(1-methoxyphenyl)piperazinereagentandliquidchromatography.ThisInternationalStandardisapplicabletothemeasurementofawiderangeoforganiccompoundscontainingisocyanatefunctionalgroups(NCO),includingisocyanatemonomersandprepolymers.ThisInternationalStandardisapplicabletothemeasurementofanyproductcontainingfreeisocyanategroups.ThisInternationalStandardisapplicabletothemeasurementoftime-weighted-averageconcentrationsoforganicisocyanatesinworkplaceatmospheres,andforsamplingoverperiodsintherange10minto8h.Itisdesignedforpersonalmonitoring,butmayalsobeusedforfixed-locationmonitoringbysuitablemodification.ThisInternationalStandardisapplicabletothemeasurementofairborneorganicisocyanatesintheconcentrationrangeapproximately0,1μgNCO·mto140μgNCO·mfora15Isamplevolume.Thequalitativeandquantitativedetectionlimitsforisocyanate,definedasthreetimesandtentimesthestandarddeviationofsixblankdeterminations,havebeenfoundtobetypicallyaround0,001μgNCOand0,004μgNCOpersamplerespectively(electrochemicaldetection).Fora15Iairsample,thesevaluescorrespondtoqualitativeandquantitativedetectionlimitsof0,07μg·mand0,3μg·mrespectively.EXAMPLESAromaticmonomersincludetoluenediisocyanate(TDI)andmethylenebis(4-phenylisocyanate)(4,4-diisocyanatodiphenylmethane,MDI).Aliphaticmonomersincludeisophoronediisocyanate(IPDI)and1,6-hexamethylenediisocyanate(HDI).Isocyanateoligomersorprepolymersarederivedfromthesemonomersbyself-condensationorreactionwithpolyols.NOTE1Organicisocyanatescanalsoarisefromthermaldecompositionofpolyurethanes.Ifbothisocyanatesandaminesarebelievedtobepresent,useofastandardwhichenablesthesimultaneousdeterminationofbothaminesandisocyanatesmaybemoreappropriate(ISOmethodindraft).AnalternativeprocedureusingtheMAP[1-(9-anthracenylmethyi)piperazine]reagentisalsoavailable(ISOmethodindraft).NOTE2Theobjectiveofairmonitoringisusuallytodetermineworkerexposureand,therefore,theproceduresdescribedinthisInternationalStandardareforpersonalsamplinginthebreathingzone.Theproceduresmaybeusedforbackgroundorfixedlocationsampling.However,itshouldberecognizedthat,duetoaerodynamiceffects,samplersdesignedforpersonalsamplingdonotnecessarilyexhibitthesamecollectioncharacteristicswhenusedforotherpurposes.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:16P;A4
【正文语种】:英语
【英文标准名称】:Aerospaceseries-Clamps,wormdrive-Dimensions,masses;GermanandEnglishversionEN4234:2006
【原文标准名称】:航空航天系列.蜗杆传动夹具.尺寸和质量
【标准号】:DINEN4234-2007
【标准状态】:作废
【国别】:德国
【发布日期】:2007-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:航空航天运输;航空运输;夹具;尺寸;紧固夹具;液压系统;作标记;质量(物质);管道;特性;航天运输;规范(验收);测试;蜗轮传动
【英文主题词】:Aerospacetransport;Airtransport;Clamps;Dimensions;Fasteningclamps;Fluidsystems;Marking;Mass;Multilingual;Pipelines;Properties;Spacetransport;Specification(approval);Testing;Wormgeardrive
【摘要】:
【中国标准分类号】:V21
【国际标准分类号】:49_080
【页数】:18P.;A4
【正文语种】:德语
