EN 12039-1999 防水软板.屋顶防水沥青毡.粒状物粘性测定
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【英文标准名称】:Flexiblesheetsforwaterproofing-Bitumensheetsforroofwaterproofing-Determinationofadhesionofgranules;GermanversionEN12039:1999
【原文标准名称】:防水软板.屋顶防水沥青毡.粒状物粘性测定
【标准号】:EN12039-1999
【标准状态】:现行
【国别】:
【发布日期】:1999-11
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;稳定性(机械性能);施工材料;试验;建筑;定义;粒状物;沥青;解释;油毛毡;防水板;地面水的保护;灌木;沥青制品;粘附;屋顶;沥青屋顶板;屋顶密封;屋面垫层;沥青片;屋顶防水层板
【英文主题词】:Adhesion;Bitumenroofsheetings;Bitumensheets;Bitumens;Bituminousfelt;Bituminousproducts;Brush;Consistency(mechanicalproperty);Construction;Constructionmaterials;Definition;Definitions;Determination;Granulates;Interpretations;Lossofmass;Losses;Protectionagainstwaterfromtheground;Roofsealing;Roofsealingsheets;Roofunderlays;Roofs;Testing;Waterproofsheetings
【摘要】:
【中国标准分类号】:Q17
【国际标准分类号】:91_100_50
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforComparativeTrackingIndexofElectricalInsulatingMaterials
【原文标准名称】:电绝缘材料比较漏电痕迹指数的标准试验方法
【标准号】:ASTMD3638-2007
【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】:D09.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:电气工程;电气绝缘;电气测试;绝缘件;测试;跟踪系数
【英文主题词】:CTI;comparativetrackingindex;tracking;contamination;trackingresistance
【摘要】:Electricalequipmentcanfailasaresultofelectricaltrackingofinsulatingmaterialthatisexposedtovariouscontaminatingenvironmentsandsurfaceconditions.ThereareanumberofASTMandothertestsdesignedtoquantifybehaviorofmaterials,especiallyatrelativelyhighvoltages.Thismethodisanacceleratedtestwhichatrelativelylowtestvoltages,providesacomparisonoftheperformanceofinsulatingmaterialsunderwetandcontaminatedconditions.Thecomparativetrackingindexisnotrelateddirectlytothesuitableoperatingvoltageinservice.Whenorganicelectricalinsulatingmaterialsaresubjectedtoconductioncurrentsbetweenelectrodesontheirsurfaces,manyminutetree-likecarbonaceouspathsortracksaredevelopedneartheelectrodes.Thesetracksareorientedrandomly,butgenerallypropagatebetweentheelectrodesundertheinfluenceoftheappliedpotentialdifference.Eventuallyaseriesoftracksspanstheelectrodegap,andfailureoccursbyshortingoftheelectrodes.Theconditionsspecifiedhereinareintended,asinothertrackingtestmethods,toproduceaconditionconducivetotheformationofsurfacedischargesandpossiblesubsequenttracking.Testconditionsarechosentoreproduciblyandconvenientlyaccelerateaprocess;forthisreason,theyrarelyreproducethevariedconditionsfoundinactualservice.Therefore,whiletrackingtestsservetodifferentiatematerialsundergivenconditions,resultsoftrackingtestscannotbeusedtoinfereitherdirectorcomparativeservicebehaviorofanapplicationdesign.Rather,trackingtestresultsprovideatoolforjudgingthesuitabilityofmaterialsforagivenapplication.Thesuitabilitycanonlybeverifiedthroughtestingthedesigninactualenduseorunderconditionswhichsimulateenduseascloselyaspossible.1.1Thistestmethodevaluatesinashortperiodoftimethelow-voltage(upto600V)trackresistanceorcomparativetrackingindex(CTI)ofmaterialsinthepresenceofaqueouscontaminants.1.2Thevaluesstatedinmetric(SI)unitsaretoberegardedasstandard.Theinch-poundequivalentsofthemetricunitsareapproximate.1.3ThisstandardistechnicallyequivalenttotheversionofIECPublication112citedin.However,the2007versionofIEC60112FourthEditionyieldsnumericalCTIvaluesthatareverylikelytodiffersignificantlyfromthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:Conicalspringwashersforbolt/nutassemblies
【原文标准名称】:螺栓和螺母用螺旋弹簧垫圈
【标准号】:DIN6796-1987
【标准状态】:作废
【国别】:德国
【发布日期】:1987-10
【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】:材料;垫圈;钢;螺钉锁紧装置;尺寸;紧固件;锁紧垫圈;弹簧垫圈;螺栓连接
【英文主题词】:Boltedjoints;Dimensions;Fasteners;Lockwashers;Materials;Screwlockingdevices;Springwashers;Steels;Washers
【摘要】:Thisstandardcontainsdimensionalandtechnicalrequirementsofconialspringwashersforboltedconnectionsandspecifiestheirdesignation.
【中国标准分类号】:J13
【国际标准分类号】:21_060_30
【页数】:2P;A4
【正文语种】:德语
