【英文标准名称】:StandardGuideforMeasuringElectricalContactIntermittences
【原文标准名称】:测量电接触中断用标准导则
【标准号】:ASTMB854-1998(2004)
【标准状态】:现行
【国别】:
【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(US-ASTM)
【起草单位】:B02.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:继电器;导则;电路不连续性;闭合开关触点;电气噪音;机电继电器;间歇性;短时间错误率;环境应力;示波器;电接触间歇性;可拆连接器;短时间间歇性;测量;滑环;耐力;可靠度
【英文主题词】:biterrorrate;electricalnoise;reliability;resistance
【摘要】:Thisguidesuggeststechniquestoevaluateintermittencesinacontactpairwhileitissubjectedtosimulatedoractualenvironmentalstress.Suchmeasurementsareavaluabletoolinpredictingcircuitperformanceunderthesestresscond
【中国标准分类号】:K14
【国际标准分类号】:29_120_20
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Plasticspipingsystemsforthesupplyofgaseousfuels-Polyethylene(PE)-Part5:Fitnessforpurposeofthesystem
【原文标准名称】:法兰及其连接件.PN标示法兰用垫圈的尺寸.有槽法兰用聚合O形密封圈
【标准号】:BSEN1555-5-2002
【标准状态】:作废
【国别】:英国
【发布日期】:2004-01-07
【实施或试行日期】:2004-01-07
【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】:塑料管;配件;定义;聚乙烯;聚乙烯管道;聚乙烯;燃气供应管线;适用性;系统;试验参数;管系统;阀门;燃气管道;压缩气体设备;压缩气体管道;燃气供应;管道;材料;规范(验收);试验;特性
【英文主题词】:Compressedgasequipment;Definitions;Fitnessforpurpose;Fittings;Gaspipelines;Gassupply;Gassupplyline;Materials;PE;PEpipes;Pipelines;Pipingsystem;Plasticpipes;Polyethylene;Pressuregaspipelines;Properties;Specification(approval);Systems;Testparameter;Testing;Valves
【摘要】:ThispartofEN1555specifiesrequirementsoffitnessforpurposeofthepolyethylene(PE)pipingsysteminthefieldofthesupplyofgaseousfuels.Itspecifiesthedefinitionsofelectrofusion,buttfusionandmechanicaljoints.Italsospecifiesthemethodofpreparationoftestpiecejoints,relatingtoinstallationrecommendationsgiveninEN12007-2:2000andtheteststobecarriedoutonthesejointsforassessingthefitnessforpurposeofthesystemundernormalandextremeconditions.Italsospecifiesthetestparametersforthetestmethodsreferredtointhisstandard.InconjunctionwiththeotherpartsofEN1555(seeForeword)itisapplicabletoPEpipes,fittings,valves,theirjointsandtojointswithcomponentsofothermaterialsintendedtobeusedunderthefollowingconditions:a)amaximumoperatingpressure,MOP,uptoandincluding10bar;b)anoperatingtemperatureof20℃asreferencetemperature.NOTE1Forotheroperatingtemperatures,deratingcoefficientsshouldbeused,seeannexA.EN1555coversarangeofmaximumoperatingpressuresandgivesrequirementsconcerningcoloursandadditives.NOTE2Itistheresponsibilityofthepurchaserorspecifiertomaketheappropriateselectionsfromtheseaspects,takingintoaccounttheirparticularrequirementsandanyrelevantnationalregulationsandinstallationpracticesorcodes.note:1)1bar=0,1MPa
【中国标准分类号】:P94
【国际标准分类号】:23_040_01;91_140_40
【页数】:19P.;A4
【正文语种】:英语