【英文标准名称】:StandardPracticeforCalculatingViscosityofaBlendofPetroleumProducts
【原文标准名称】:计算石油产品混合物粘性的标准实施规程
【标准号】:ASTMD7152-2005e1
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D02.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:粘度;混合物;石油产品
【英文主题词】:blending;kinematicviscosity;MacCoull;viscosity;Wright
【摘要】:Predictingtheviscosityofablendofcomponentsisacommonproblem.BoththeWrightBlendingMethodandtheASTMBlendingMethod,describedinthispractice,maybeusedtosolvethisproblem.Theinverseproblem,predicatingtherequiredblendfractionsofcomponentstomeetaspecifiedviscosityatagiventemperaturemayalsobesolvedusingeithertheInverseWrightBlendingMethodortheInverseASTMBlendingMethod.TheWrightBlendingMethodsaregenerallypreferredsincetheyhaveafirmerbasisintheory,andaremoreaccurate.TheWrightBlendingMethodsrequirecomponentviscositiestobeknownattwotemperatures.TheASTMBlendingMethodsaremathematicallysimplerandmaybeusedwhenviscositiesareknownatasingletemperature.Althoughthispracticewasdevelopedusingkinematicviscosityandvolumefractionofeachcomponent,thedynamicviscosityormassfraction,orboth,maybeusedinsteadwithminimalerrorifthedensitiesofthecomponentsdonotdiffergreatly.Forfuelblends,itwasfoundthatviscosityblendingusingmassfractionsgavemoreaccurateresults.Forbasestockblends,therewasnosignificantdifferencebetweenmassfractionandvolumefractioncalculations.Thecalculationsdescribedinthispracticehavebeencomputerizedasaspreadsheetandareavailableasanadjunct.31.1Thispracticecoverstheproceduresforcalculatingtheestimatedkinematicviscosityofablendoftwoormorepetroleumproducts,suchaslubricatingoilbasestocks,fuelcomponents,residuawithkerosine,crudeoils,andrelatedproducts,fromtheirkinematicviscositiesandblendfractions.1.2Thispracticeallowsfortheestimationofthefractionofeachoftwopetroleumproductsneededtoprepareablendmeetingaspecificviscosity.1.3Thispracticemaynotbeapplicabletoothertypesofproducts,ortomaterialswhichexhibitstrongnon-Newtonianproperties,suchasviscosityindeximprovers,additivepackages,andproductscontainingparticulates.1.4ThevaluesstatedinSIunitsaretoregardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Logarithmsmaybeeithercommonlogarithmsornaturallogarithms,aslongasthesameareusedconsistently.Thispracticeusescommonlogarithms.Ifnaturallogarithmsareused,theinversefunction,exp(),mustbeusedinplaceofthebase10exponentialfunction,10,usedherein.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:9P.;A4
【正文语种】: