ANSI/ASTM D1786-1997 甲苯disocyanate规范(08.02)

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【英文标准名称】:StandardTestMethodforConstantTensileLoadJointTest(CTLJT)
【原文标准名称】:恒定拉伸载荷连接试验的标准试验方法
【标准号】:ASTMF1588-1996(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:F17.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:constanttensileload;mechanicalfitting;mechanicaljoint;polyethylenegaspipe;pull-out;tensiletest;Constanttensileloadjointtest(CTLJT);CTLJT(constanttensileloadjointtest);Mechanicalfittings;Mechanicaljointcategory1/3;Polyeth
【摘要】:Thistestmethodwasdesignedtobeusedtovalidatethelong-termresistancetopulloutofjointsdesignedforuseinplasticnaturalgaspipingsystems.Thistestmethodisusedinadditiontotheshort-termtestsrequiredbyOPSPart192.283b,Title49.Informalversionsofthistestmethodareusedbymanufacturersandutilitiestodemonstratethatajointisresistanttotheeffectsoflong-termcreepandmeetstherequirementsforclassificationasaCategory1oraCategory3jointinaccordancewithSpecificationD2513.Thistestmethodmayalsobeapplicableforthedeterminationoftheeffectsofasustainedaxialloadonjointsorothercomponentsofplasticpipingsystemsdesignedforotherapplications.Testparametersandtheinternalpressurizingfluid,ifany,shouldbelistedinthereferencingdocument.Documentsthatreferencethistestmethodforproductsotherthanjointsshallspecifytestconditionsandperformancerequirements.Ingeneral,suchproductspassthistestiftheymaintaintheirstructuralintegrity,donotleak,andperformtospecificationduringandafterthetest.1.1Theconstanttensileloadjointtest(CTLJT)isdesignedtodemonstratethatajointinaplasticpipingsystemisresistanttotheeffectsoflong-termcreep.1.1.1Thejointissubjectedtoaninternalpressureatleastequaltoitsoperatingpressureandasustainedaxialtensileloadforaspecifiedtimeperiod,usually1000h.Thejointshallnotleak,normaythepipecompletelypulloutforthetestduration.Thetotalaxialstressissetbythereferencingdocument.1.1.2SometypicalconditionsfortestingofjointsonpolyethylenepipearedescribedinAppendixX1.1.2Thistestisusuallyperformedat73x00B0;F(22.8x00B0;C).1.3TheCTLJTwasdevelopedtodemonstratethelong-termresistancetopulloutofmechanicaljointsonpolyethylenegaspipe.TheCTLJThasalsobeensuccessfullyappliedtotheevaluationofothercomponentsofplasticpipingsystems.TheseapplicationsarediscussedinAppendixX1.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:23_040_20
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:Single-postearthingswitches-Ratedvoltage123kV-Terminalandmountingdimensions,layout
【原文标准名称】:单相接地开关.额定电压123kV.端子、安装尺寸和电路设计
【标准号】:DIN43657-2007
【标准状态】:现行
【国别】:德国
【发布日期】:2007-09
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:连接;尺寸;配电;接地开关;电气工程;电子工程;电工产品;电气技术;熔断器;高压开关设备;电路设计;安装尺寸;户外变电站;过电流保护;过电流保护装置;过电压保护装置;额定电压;晶闸管;单相接地开关;电涌放电器;开关设备
【英文主题词】:
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_120_50
【页数】:7P;A4
【正文语种】:德语