Designation:D5188−14StandardTestMethodforVapor-LiquidRatioTemperatureDeterminationofFuels(EvacuatedChamberandPistonBasedMethod)1ThisstandardisissuedunderthefixeddesignationD5188;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthetem-peratureatwhichthevaporformedfromaselectedvolumeofvolatilepetroleumproductsaturatedwithairat0°Cto1°C(32°Fto34°F)producesapressureof101.3kPa(oneatmosphere)againstvacuum.Thistestmethodisapplicabletosamplesforwhichthedeterminedtemperatureisbetween36°Cand80°C(97°Fand176°F)andthevapor-liquidratioisbetween8to1and75to1.NOTE1—Whenthevapor-liquidratiois20:1,theresultisintendedtobecomparabletotheresultsdeterminedbyTestMethodD2533.NOTE2—Thistestmethodmayalsobeapplicableatpressuresotherthanoneatmosphere,butthestatedprecisionmaynotapply.1.2Thistestmethodisapplicabletobothgasolineandgasoline-oxygenateblends.1.2.1Somegasoline-oxygenateblendsmayshowahazewhencooledto0°Cto1°C.Ifahazeisobservedin12.5,itshallbeindicatedinthereportingofresults.Theprecisionandbiasstatementsforhazysampleshavenotbeendetermined(seeNote10).1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarnings,see7.2and8.1.1.2.ReferencedDocuments2.1ASTMStandards:2D2533TestMethodforVapor-LiquidRatioofSpark-IgnitionEngineFuels(Withdrawn2008)3D2892TestMethodforDistillationofCrudePetroleum(15-TheoreticalPlateColumn)D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD6299PracticeforApplyingStatisticalQualityAssu...
