ASTM D 792-1998 用位移法测定塑料密度和比重(相关密度)的标准试验方法
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来源:标准资料网
【英文标准名称】:StandardTestMethodsforDensityandSpecificGravity(RelativeDensity)ofPlasticsbyDisplacement
【原文标准名称】:用位移法测定塑料密度和比重(相关密度)的标准试验方法
【标准号】:ASTMD792-1998
【标准状态】:作废
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;比重;通用塑料;塑料;位移;密度
【英文主题词】:density;plasticsgeneral;test;specificgravity;plastics;displacement
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:
【正文语种】:英语
【英文标准名称】:Qualitysystems.Medicaldevices.ParticularrequirementsfortheapplicationofENISO9002.
【原文标准名称】:质量体系.医疗设备.使用ENISO9002的专门要求(欧洲标准EN46002)
【标准号】:NFS99-102-1996
【标准状态】:作废
【国别】:法国
【发布日期】:1996-12-01
【实施或试行日期】:1996-12-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:C30
【国际标准分类号】:11_040_01;03_120_10
【页数】:17P.;A4
【正文语种】:其他
【英文标准名称】:Dry,solidinsulatingmaterials-Resistancetesttohigh-voltage,low-currentarcdischarges
【原文标准名称】:干性固体绝缘材料.高电压低电流电弧放电电阻试验
【标准号】:BSEN61621-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-02-15
【实施或试行日期】:1998-02-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:耐电弧性;电流;定义;电弧;电气工程;电绝缘材料;高电压;耐高压试验;绝缘材料;绝缘件;耐力;测试;电压
【英文主题词】:Arcresistance;Currents;Definition;Definitions;Electricarcs;Electricalengineering;Electricalinsulatingmaterials;Highvoltage;High-voltagetests;Insulatingmaterials;Insulations;Resistance;Testing;Voltage
【摘要】:ThisInternationalStandarddescribesatestmethodwhichcanprovidepreliminarydifferentiationbetweensimilarinsulatingmaterials,withrespecttotheirresistancetodamagewhenexposedtohigh-voltage,low-currentarcdischarges,occurringclosetotheirsurfaces.Thedischargescauselocalizedthermalandchemicaldecompositionanderosionandeventuallyaconductivepathformsacrosstheinsulatingmaterial.Theseverityofthetestconditionsisgraduallyincreased:intheearlystagesalow-currentarcdischargeisrepeatedlyinterrupted,whereasinthelaterstages,thearccurrentisraisedinsuccessivesteps.Becauseofitsconvenienceandbecauseoftheshorttimerequiredfortesting,thetestmethodisapplicableforpreliminaryscreeningofmaterials,fordetectingtheeffectsofchangesinformulationandforqualitycontroltesting.Previousexperiencewiththistest,showedacceptablereproducibilitywiththermosetmaterials.Usingthermoplastics,sometestinglaboratoriesreportunacceptablylargevariationintestresultswhichleadtotherecommendationnottousethetestforthermoplastics.NOTE-Attemptsarebeingmadetoreducethevariabilityoftheresultsoftestsonthermoplasticsbycontrollingtheelectrodepressureanddepthofpenetrationintothematerialduringthetest.Withoutsuchelectrodecontrol,testsonmanythermoplasticsmaynotbesufficientlymeaningfultobeperformed.Thistestmethodwillnot,ingeneral,permitconclusionstobedrawnconcerningtherelativearcresistancerankingsofmaterialswhichmaybesubjectedtoothertypesofarcs.Therankingofmaterialsmaydifferfromthatfoundinwettrackingtests(e.g.IEC60112,IEC60587andIEC61302)andfromtheirperformanceinservice,wheretheintensity,recurrencefrequencyandtimeofexposuretoarcdischargesareverydifferent.
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:18P;A4
【正文语种】:英语
