Designation:D4052−22StandardTestMethodforDensity,RelativeDensity,andAPIGravityofLiquidsbyDigitalDensityMeter1ThisstandardisissuedunderthefixeddesignationD4052;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofthedensity,relativedensity,andAPIGravityofpetroleumdistillatesandviscousoilsthatcanbehandledinanormalfashionasliquidsatthetemperatureoftest,utilizingeithermanualorautomatedsampleinjectionequipment.Itsapplicationisrestrictedtoliquidswithtotalvaporpressures(seeTestMethodD5191)typicallybelow100kPaandviscosities(seeTestMethodD445orD7042)typicallybelowabout15000mm2/satthetempera-tureoftest.Thetotalvaporpressurelimitationhowevercanbeextendedto>100kPaprovidedthatitisfirstascertainedthatnobubblesformintheU-tube,whichcanaffectthedensitydetermination.Someexamplesofproductsthatmaybetestedbythisprocedureinclude:gasolineandgasoline-oxygenateblends,diesel,jet,basestocks,waxes,andlubricatingoils.1.1.1Waxesandhighlyviscoussampleswerenotincludedinthe1999interlaboratorystudy(ILS)samplesetthatwasusedtodeterminethecurrentprecisionstatementsofthemethod,sinceallsamplesevaluatedatthetimewereanalyzedatatesttemperatureof15°C.Waxandhighlyviscoussamplesrequireatemperaturecelloperatedatelevatedtemperaturesnecessarytoensurealiquidtestspecimenisintroducedforanalysis.Consultinstrumentmanufacturerinstructionsforappropriateguidanceandprecautionswhenattemptingtoanalyzewaxorhighlyviscoussamples.RefertothePrecisionandBiassectionofthemethodandNote9formoredetailedinformationaboutthe1999ILSthatwasconducted.1.2Incasesofdispute,therefereemethodistheonewheresamplesareintroducedmanuallyasin6.2or6.3,asappropri-ateforsampletype.1.3Whentestingopaquesamples,andwhennotusingequipmen...
