ASTM D7261-2008 便携式分离计测定柴油机燃料脱水性能的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingWaterSeparationCharacteristicsofDieselFuelsbyPortableSeparometer
【原文标准名称】:便携式分离计测定柴油机燃料脱水性能的标准试验方法
【标准号】:ASTMD7261-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D02.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coalescence;dieselfuel;dieselfuelcoalescer;DSEPrating;surfactant;waterseparation;Coalescence;Dieselenginefueloils;Portableseparometer;Waterseparation--fuels
【摘要】:Thistestmethodprovidesameasureofthepresenceofsurfactantsindieselfuels,andcanbeperformedinthefieldorinalaboratory.LikeTestMethodD3948usedforjetfuel,thistestmethodcandetecttracesofsomerefinerytreatingchemicalsleftinfuel.Itcanalsodetectsurfaceactivesubstancesaddedtoorpickedupbythefuelduringhandlingfrompointofproductiontopointofuse.Certainadditives,whichcanactasweaksurfactants,giveaslightlyreducedDSEPrating.OthersubstanceswhicharestrongsurfactantsgivemuchlowerDSEPratings.Whilefilterseparatorshavenotbeencommonindieselfuelsystems,theycouldbecomemoreprevalentwithULSDcontainingincreasedadditivecontenttoensureclean,dryfuelsinnewenginedesigns.Weaksurfactants,withslightlyreducedDSEPratings,donotaffecttheabilityoffilterseparatorstoseparatefreewaterfromthefuel.StrongsurfactantsgiveamuchlowerDSEPratingandadverselyaffecttheabilityoffilterseparatorstoseparatefreewaterfromthefuel.Resultsfromthistestmethoddonothaveaknownrelationshiptotherateofwatersettlingintanks.TheMicro-Separometerhasameasurementrangefrom50to100.Valuesobtainedoutsideofthoselimitsareundefinedandinvalid.Note28212;Intheeventavaluegreaterthan100isobtained,thereisagoodprobabilitythatlighttransmittancewasreducedbymaterialcontainedinthefuelusedtosetthe100referencelevel.Thematerialwassubsequentlyremovedduringthecoalescingportionofthetest,thus,theprocessedfuelhadahigherlighttransmittancethanthefuelsampleusedtoobtainthe100referencelevelresultinginthefinalratingmeasuringinexcessof100.1.1Thistestmethodcoversarapidportablemeansforfieldandlaboratoryusetoratetheabilityofdieselfuels(bothneatandthosecontainingadditives)toreleaseentrainedoremulsifiedwaterwhenpassedthroughfiberglasscoalescingmaterial.1.2ThistestmethodisapplicabletodieselfuelssuchasD975GradeNo.1andGradeNo.2ofallsulfurlevels,andMIL-F-16884,navaldistillatefuel(NATOF-76).Note18212;ThistestmethodissimilartoTestMethodD3948whichisapplicabletoaviationturbinefuels.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:11P.;A4
【正文语种】:英语