Designation:D7224−20AnAmericanNationalStandardStandardTestMethodforDeterminingWaterSeparationCharacteristicsofKerosine-TypeAviationTurbineFuelsContainingAdditivesbyPortableSeparometer1ThisstandardisissuedunderthefixeddesignationD7224;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThistestmethodwasdevelopedtosatisfythreeobjectives:(1)DevelopatestmethodthatwouldrespondinthesamemannerasTestMethodD3948tostrongsurfactants,butnotgivelowmicro-separometer(MSEP)ratingstofuelscontainingweaksurfactants(additives)thatdonotdegradetheperformanceofcommercialfilterseparatorelements;(2)Usefiltermediainthecoalescertestthatwouldberepresentativeofthefiltrationmediaincommercialfilterseparatorelements;and(3)ImprovetheprecisionofthetestmethodcomparedtoTestMethodD3948.Thistestmethodwasdevelopedusingmaterialthatisrepresentativeofcoalescingmaterialscurrentlyusedincommercialfilterseparatorelements.ThefiberglasscoalescingmaterialusedinTestMethodD3948wassuitableforcoalescingfiltersinusewhenthattestmethodwasdeveloped,butdevelopmentsincoalescingelementsintheinterveningyearshaveresultedinimprovedmaterialsthatarenotaffectedbyweaksurfactants.TestMethodD3948yieldslowresultsonsomeadditizedfuelsthatdonotaffecttheperformanceoffilterseparators(coalescingfilters)inactualservice.Sincethistestmethodwasdevelopedwithmaterialthatisrepresentativeofthemediausedincurrentfilterseparators,theresultsbythistestmethodaremorerelevanttoperformanceincurrentfilterseparators.1.Scope*1.1Thistestmethodcoversarapidportablemeansforfieldandlaboratoryusetoratetheabilityofkerosine-typeaviationturbinefuels,bothneatandthosecontainingadditives,toreleaseentrainedoremulsifiedwaterwhenpassedthroughfiberglasscoalescingmaterial.1.1.1Thistestmethodisapplicabletokerosine-typeavia-tionturbinefuelsincluding:JetAandJetA-...
