【英文标准名称】:StandardTestMethodforCalculationofViscosity-GravityConstant(VGC)ofPetroleumOils
【原文标准名称】:石油润滑油粘度-重力常数(VGC)的计算试验方法
【标准号】:ASTMD2501-1991(2005)
【标准状态】:现行
【国别】:
【发布日期】:1991
【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】:D02.04.0K
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:粘度-重力常数;润滑剂;粘度;石油产品;数学计算;试验
【英文主题词】:aromatic;density;kinematicviscosity;paraffinic
【摘要】:Theviscosity-gravityconstant(VGC)isausefulfunctionfortheapproximatecharacterizationoftheviscousfractionsofpetroleum.2Itisrelativelyinsensitivetomolecularweightandisrelatedtoafluidscompositionasexpressedintermsofcertainstructuralelements.ValuesofVGCnear0.800indicatesamplesofparaffiniccharacter,whilevaluescloseto1.00indicateapreponderanceofaromaticstructures.Likeotherindicatorsofhydrocarboncomposition,theVGCshouldnotbeindiscriminatelyappliedtoresidualoils,asphalticmaterials,orsamplescontainingappreciablequantitiesofnonhydrocarbons.1.1Thistestmethodcoversthecalculationoftheviscosity-gravityconstant(VGC)ofpetroleumoilshavingviscositiesinexcessof4cSt.=4X10-6m-2/sat40176C(104176F).1.2AnnexA1describesamethodforcalculatingtheVGCfromSaybolt(SUS)viscosityandrelativedensity.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.>1.4ThevaluesstatedineitheracceptableSIunitsorinotherunitsshallberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.
【中国标准分类号】:E34
【国际标准分类号】:75_080
【页数】:3P.;A4
【正文语种】: