Designation:D8181−19StandardSpecificationforMicroemulsionBlendstockforPreparingMicroemulsionTestFuelOils1ThisstandardisissuedunderthefixeddesignationD8181;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationdescribesanalcohol-carboxylicacidblend,referredtoasthemicroemulsionblendstock.1.1.1Warning—Themicroemulsionblendstockshouldbestoredinfacilitiesandequipmentdesignedforoxygenatedandlowflashpointliquids.1.2Themicroemulsionblendstockistobeblendedwithfueloilstoproduceamicroemulsiontestfueloilthatconsistsofinversemicelles.NOTE1—Whilenofuelstandardcurrentlyexistsforamicroemulsiontestfueloil,worktodeveloponeisunderway.NOTE2—TypicalfueloilsthatcouldbeusedforblendingwithmicroemulsionblendstockarefuelsthatcomplywithSpecificationsD975andD396andmaycontainupto5%byvolumebiodiesel.NOTE3—Testingwithtestfuelscontaining10%microemulsionblendstockusingB5asabasefueldidnotshowanydetrimentalchangestospecifiedfuelpropertiesrelativetoB0basefuels,butcanimpairmeasurementofmicroemulsionblendstockconcentration.1.2.1Themicroemulsiontestfueloil(tobemadefromthisblendstock)istobeusedfortestinganddemonstrationpurposesonlyinspecificequipmentandvehiclesthataresuitedfororhavebeenequippedwithsafetyprecautionsforusewithlowflashpointfuelsandoxygenatedfuelssuchasethanol.Minimumsafetyprecautionsmayincludeflamearrestorsandgroundingstraps.NOTE4—Thelowflashpointofthisblendstockrelativetoconventionaldieselfuelincreasescertainhazardsduringstorageanddistribution.1.3Nothinginthisspecificationshallprecludeobservanceoffederal,state,orlocalregulations,whichmaybemorerestrictive.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetycon...
