【英文标准名称】:StandardforSafetyforCoverPlatesforFlush-MountedWiringDevices
【原文标准名称】:嵌入安装布线装置用盖板的安全性标准
【标准号】:ANSI/UL514D-2009
【标准状态】:作废
【国别】:美国
【发布日期】:2009
【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】:检查孔;连接箱;盖板;覆盖层;封盖物;配电箱;外壳;冲洗箱;地板下(电气)设备
【英文主题词】:Accessopenings;Boxes(electric);Coverplates;Coveringsheet;Covers;Distributionboxes;Enclosures;Flushboxes;Underfloorinstallation
【摘要】:
【中国标准分类号】:L24
【国际标准分类号】:29_120_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforResistanceofTransparentPlasticstoSurfaceAbrasion
【原文标准名称】:透明塑料表面耐磨蚀性的标准试验方法
【标准号】:ASTMD1044-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:abrasion;haze;hazemeter;surfaceabrasion;Taberabraser;Abrasionresistance--plastics;Haze;Opticalmaterials/properties/tests;Surfaceanalysis--plastics;Transparentplastics
【摘要】:p>Transparentplasticmaterials,whenusedaswindowsorenclosures,aresubjecttowipingandcleaning;hencethemaintenanceofopticalqualityofamaterialafterabrasionisimportant.Itisthepurposeofthistestmethodtoprovideameansofestimatingtheresistanceofsuchmaterialstothistypeanddegreeofabrasion.Althoughthistestmethoddoesnotprovidefundamentaldata,itissuitableforgradingmaterialsrelativetothistypeofabrasioninamannerwhichcorrelateswithservice.Comparisonofinterlaboratorydataorthespecificationofax201C;hazex201D;valuehasnosignificanceifthehazemeterrequirementsgivenin5.4arenotused.ThisisbecauselightdiffusedfromthesurfaceofaTabertrackisscatteredatanarrowangle(Fig.1andFig.2)whilelightdiffusedinternallybyaspecimenisscatteredatawideangle.Inmanyhazemeters,whenadiaphragmisinsertedtolimitthelightbeamtothewidthoftheabradedtrack,thespecularbeamattheexitportbecomessmaller.Thedarkannuluswillthenbegreaterthanthe0.023x00B1;0.002rad(1.3x00B1;0.1x00B0;)requirementsofTestMethodD1003.Sincealargepercentageofthenarrow-angleforward-scatteredlightwillnotimpingeonthespherewall,x201C;hazex201D;readingsbecomesmaller.Forhazemetersthathavenotbeenproperlyadjusted,themagnitudeofthisreductionisdependentbothontheintegratingspherediameterandthereductionoftheentrancebeam.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Forsomematerials,abrasiontestsutilizingtheTaberabrasermaybesubjecttovariationduetochangesintheabrasivecharacteristicsofthewheelduringtesting.Dependingonabradanttypeandtestspecimen,thewheelsurfacemaychange(thatis,becomeclogged)duetothepickupofcoatingorothermaterialsfromtestspecimensandmustbecleanedatfrequentintervals.Thetypeofmaterialbeingtestedandthenumberoftestcyclesbeingrunisknowntosometimesinfluencethetemperatureoftherunningsurfaceofthewheelwithanaffectonthefinalhazemeasurement.Toreduceanyvariabilityduetothistemperatureeffect,stabilizethewheelssurfacetemperaturepriortoperformingactualmeasurements.ThisshallbeaccomplishedbyconductingmultiplerefacingsonanST-11refacingstone,followedbyatestonthesamplematerialtobetested(withresultstobediscarded).1.1Thistestmethoddescribesaprocedureforestimatingtheresistanceoftransparentplasticstoonekindofsurfaceabrasionbymeasuringthechangeinopticalproperties.1.2AbrasivedamageisvisuallyjudgedandnumericallyquantifiedbythedifferenceinhazepercentageinaccordancewithTestMethodD1003betweenanabradedandunabradedspecimen.1.3CS-10FwheelsmanufacturedbetweenOctober2002andSeptember2004havebeenfoundtogivedifferentresultsthanhistoricalvalues.Comparisonsofdatausingthesewheelsshouldbemadewithcaution.ResultsusingwheelsmadeafterSeptember2004haveagreedwiththoseobtainedbeforeOctober2002.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninbracketsareforinformationonly.......
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:7P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 铍青铜条材和带材 |
| 中标分类： |
冶金 >>
有色金属及其合金产品 >>
重金属及其合金 |
| 替代情况： | YB/T 552-1975;被YS/T 323-2002代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1976-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 冶金 有色金属及其合金产品 重金属及其合金