ANSI C135.20-1988 线路架设用镀锌铁制绝缘子U型接线箍

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【英文标准名称】:StandardTestMethodforTotalMassLossandCollectedVolatileCondensableMaterialsfromOutgassinginaVacuumEnvironment
【原文标准名称】:真空环境中放气引起的总质量损失及收集的挥发性可凝结物的测定用标准试验方法
【标准号】:ASTME595-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E21.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空航天运输;材料;航天技术;测试;真空的;挥发性的
【英文主题词】:CollectedVolatileCondensableMaterial(CVCM);materialselection;materialtest;Outgassing;screeningtest;spacecraftmaterials;TotalMassLoss(TML);VolatileCondensableMaterials(VCM)
【摘要】:Thistestmethodevaluates,undercarefullycontrolledconditions,thechangesinthemassofatestspecimenonexposureundervacuumtoatemperatureof125x00B0;Candthemassofthoseproductsthatleavethespecimenandcondenseonacollectoratatemperatureof25x00B0;C.The24htesttimedoesnotrepresentactualoutgassingfromyearsofoperation,soahighertesttemperatureshortertimewasselectedtoallowmaterialcomparisonswithnointenttopredictactualoutgassinginservice.Thetesttemperatureof125x00B0;Cwasassumedtobesignificantlyabovetheexpectedoperatingtemperatureinservice.Ifexpectedoperatingtemperaturesexceed65to70x00B0;Cthetesttemperatureshouldbeincreased.Itissuggestedthattesttemperaturebeatleast30x00B0;ChigherthanexpectedmaximumservicetemperatureinordertoprovidematerialcomparisonsforTMLandCVCM.Comparisonsofmaterialoutgassingpropertiesarevalidat125x00B0;Csampletemperatureand25x00B0;Ccollectortemperatureonly.Samplestestedatothertemperaturesmaybecomparedonlywithothermaterialswhichweretestedatthatsametemperature.Themeasurementsofthecollectedvolatilecondensablematerialarealsocomparableandvalidonlyforsimilarcollectorgeometryandsurfacesat25x00B0;C.Sampleshavebeentestedatsampletemperaturesfrom50to400x00B0;Candatcollectortemperaturesfrom1to30x00B0;Cbythistesttechnique.Datatakenatnonstandardconditionsmustbeclearlyidentifiedandshouldnotbecomparedwithsamplestestedat125x00B0;Csampletemperatureand25x00B0;Ccollectortemperature.Thesimulationofthevacuumofspaceinthistestmethoddoesnotrequirethatthepressurebeaslowasthatencounteredininterplanetaryflight(forexample,10x2212;12Pa(10x2212;14torr)).Itissufficientthatthepressurebelowenoughthatthemeanfreepathofgasmoleculesbelongincomparisontochamberdimensions.Thismethodofscreeningmaterialsisconsideredaconservativeonebecausemaximumoperatingtemperaturesinserviceareassumednottoexceed50to60x00B0;Cformostapplications.Itispossiblethatafewmaterialswillhaveacceptablepropertiesattheintendedusetemperaturebutwillbeeliminatedbecausetheirpropertiesarenotsatisfactoryatthetesttemperatureof125x00B0;C.Also,materialsthatcondenseonlybelow25x00B0;Carenotdetected.Theusermaydesignateadditionalteststoqualifymaterialsforaspecificapplication.ThedeterminationsofTMLandWVRareaffectedbythecapacityofthematerialtogainorlosewatervapor.Therefore,theweighingsmustbeaccomplishedundercontrolledconditionsof23x00B0;Cand50%relativehumidity.Alternatively,allspecimensmaybeputintoopenglassvialsduringthe24-htemperatureandhumidityconditioning.Thevialsmustbecappedbeforeremovalfromtheconditioningchamber.Eachspecimenmustbeweighedwithin2minafteropeningthevialtominimizethelossorabsorptionofwatervaporwhileexposedtoanuncontrolledhumidityenvironment.Whilecontrolofhumidityisnotnecessaryatthispoint,thetemperaturefortheweighingshouldbecontrolledat23x00B0;C,thesametemperatureprescribedfort......
【中国标准分类号】:V10
【国际标准分类号】:
【页数】:9P.;A4
【正文语种】:


【英文标准名称】:Assemblytoolsforscrewsandnuts-Squaredrivesockets-Part3:Machine-operatedsockets("nonimpact");Dimensions
【原文标准名称】:螺钉和螺母用装配工具方头传动套筒第3部分：机动套筒(非撞击)尺寸
【标准号】:ISO2725-3-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-04
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:扳手;旋具和螺母扳手;方形套筒;管套扳手;机器驱动的;尺寸;名称与符号;作标记;工具
【英文主题词】:Designations;Dimensions;Machineoperated;Marking;Screwdriversandspanners;Socketwrenches;Squaresockets;Tools;Wrenches
【摘要】:ThispartofISO2725specifiesdimensions,designationandmarkingofmachineoperated"non-impact"squaredrivesockets.NOTE1Machineoperated"non-impact"squaredrivesocketsarelistedundernumber301inISO1703:1983.NOTE2Hand-operatedsocketsaredealtwithinISO2725-1.Machine-operated"impact"socketsaredealtwithinISO2725-2.
【中国标准分类号】:J47
【国际标准分类号】:25_140_01
【页数】:4P;A4
【正文语种】:英语