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1、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoT
2、rade(TBT)Committee.Designation:D4052−18StandardTestMethodforDensity,RelativeDensity,andAPIGravityofLiquidsby1DigitalDensityMeterThisstandardisissuedundertheÞxeddesignationD4052;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,int
3、hecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*bubbles
4、inthesamplecellcanbeestablishedwithcertainty.ForthedeterminationofdensityincrudeoilsamplesuseTest1.1Thistestmethodcoversthedeterminationofthedensity,MethodD5002.relativedensity,andAPIGravityofpetroleumdistillatesandviscousoilsthatcanbehandledinanormalfashionas
5、liquids1.4ThevaluesstatedinSIunitsareregardedastheatthetemperatureoftest,utilizingeithermanualorautomatedstandard,unlessstatedotherwise.Theacceptedunitsofmea-sampleinjectionequipment.Itsapplicationisrestrictedtosurefordensityaregramspermillilitre(g/mL)orkilogr
6、ams3liquidswithtotalvaporpressures(seeTestMethodD5191)percubicmetre(kg/m).typicallybelow100kPaandviscosities(seeTestMethodD4451.5Thisstandarddoesnotpurporttoaddressallofthe2orD7042)typicallybelowabout15000mm/satthetempera-safetyconcerns,ifany,associatedwithits
7、use.Itisthetureoftest.Thetotalvaporpressurelimitationhowevercanberesponsibilityoftheuserofthisstandardtoestablishappro-extendedto>100kPaprovidedthatitisÞrstascertainedthatpriatesafety,health,andenvironmentalpracticesanddeter-nobubblesformintheU-shaped,oscillat
8、ingtube,whichcanminetheapplicabilityofregulatorylimitationspriortouse.affectthedensitydetermination.SomeexamplesofproductsForspeciÞcwarningstatements,see7.4,7.5,and10.3.thatmaybete
