Designation:D2068−17StandardTestMethodforDeterminingFilterBlockingTendency1ThisstandardisissuedunderthefixeddesignationD2068;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThistestmethoddescribesthreeproceduresusingdifferentfiltermedia.Theresultofanytestisdependentonthefiltermandatedintheprocedure.IfaspecificationrequiresaspecificD2068procedure,donotsubstituteadifferentprocedureorfilterwithoutagreementfromthespecifier.1.Scope*1.1Thistestmethodcoversthreeproceduresforthedeter-minationofthefilterblockingtendency(FBT)andfilterabilityofmiddledistillatefueloilsandliquidfuelssuchasbiodieselandbiodieselblends.Thethreeproceduresandassociatedfiltertypesareapplicabletofuelswithintheviscosityrangeof1.3mm2to6.0mm2/sat40°C.NOTE1—ASTMspecificationfuelsfallingwithinthescopeofthistestmethodare:SpecificationD396GradesNo1and2;SpecificationD975Grades1-D,lowsulfur1-Dand2-D;SpecificationD2880Grades1-GTand2-GT;SpecificationD6751.1.2Thistestmethodisnotapplicabletofuelsthatcontainfree(undissolved)water(see7.3).1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D396SpecificationforFuelOilsD975SpecificationforDieselFuelOilsD2880SpecificationforGasTurbineFuelOil...
