HB 7029.7-1994 夹具通用件紧固件 带凸肩滚花螺钉
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基本信息
| 标准名称： | 夹具通用件紧固件 带凸肩滚花螺钉 |
| 中标分类： | 航空、航天 >> 航空器与航天器制造用设备 >> 夹具 |
| 发布日期： | 1994-10-31 |
| 实施日期： | 1995-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 航空 航天 航空器与航天器制造用设备 夹具
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MIL-M-38761B, MILITARY SPECIFICATION: MICROFILMING AND PHOTOGRAPHING OF ENGINEERING/TECHNICAL DATA AND RELATED DOCUMENTS, REQUIREMENTS FOR (14 FEB 1994) [NO S/S DOCUMENT]., The principle objective is to provide 80-column military tabulating card (see 6.4.4)construction, microfilm carrier bonding process, and testing requirements for engineering data (see 6.4.1) as set forth within the DoD Engineering Data Reproduction Systems (EDRS) standardization area.【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
【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