基本信息
标准名称: | 带电作业用500kV四分裂导线飞车 |
中标分类: |
电工 >>
输变电设备 >>
输电线路器材 |
替代情况: | 被DL/T 636-2006代替 |
发布日期: | 1900-01-01 |
实施日期: | 2002-12-01 |
首发日期: | 1900-01-01 |
作废日期: | 2007-03-01 |
出版日期: | 1900-01-01 |
页数: | 8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: 电工 输变电设备 输电线路器材
【英文标准名称】:StandardTestMethodforEstimatingApparentVaporPressuresandMolecularWeightsofLubricatingOils
【原文标准名称】:润滑油表面蒸气压力和分子量评估的标准试验方法
【标准号】:ASTMD2878-1995(2005)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:D02.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:蒸气压力;估计;润滑剂;石油产品;试验;分子量
【英文主题词】:lubricatingoils;molecularweight;vaporpressure
【摘要】:Thevaporpressureofasubstanceasdeterminedbymeasurementofevaporationreflectsapropertyofthebulksample.Littleweightisgivenbytheproceduretothepresenceoflowconcentrationsofvolatileimpurities.Vaporpressure,perse,isathermodynamicpropertythatisdependentonlyuponcompositionandtemperatureforstablesystems.Inthepresentmethod,compositionchangesoccurduringthecourseofthetestsothatthecontributionofminoramountsofvolatileimpuritiesisminimized.1.1ThistestmethodprovidesacalculationprocedureforconvertingdataobtainedbyTestMethodD972toapparentvaporpressuresandmolecularweights.Ithasbeendemonstratedtobeapplicabletopetroleum-basedandsyntheticesterlubricatingoils,attemperaturesof395to535K(250to500oF).However,itsapplicabilitytolubricatinggreaseshasnotbeenestablished.Note1--Mostlubricantsboiloverafairlywidetemperaturerange,afactrecognizedindiscussionoftheirvaporpressures.Forexample,theapparentvaporpressureovertherange0to0.1%evaporatedmaybeasmuchas100timesthatovertherange4.9to5.0%evaporated.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Incasesinwhichmaterials,products,orequipmentareavailableininch-poundunitsonly,SIunitsareomitted.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityorregulatorylimitationspriortouse.Forspecifichazardstatements,see6.2,7.1,and8.2.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:6P.;A4
【正文语种】: