Designation:D4304−17StandardSpecificationforMineralandSyntheticLubricatingOilUsedinSteamorGasTurbines1ThisstandardisissuedunderthefixeddesignationD4304;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversmineralandsynthetic(APIgroupI,II,III,orIV)oilsusedinsteamandgasturbinelubricationsystemswheretheperformancerequirementsde-mandhighlyrefinedmineralorsyntheticbaseoilscompoundedwithrustandoxidationinhibitorsplusselectedadditivesasneededtocontrolfoam,wear,demulsibility,andsoforth.Thisstandardmayalsobeappliedto“combinedcycle”turbinesystems,whereasinglelubricantcirculatingsystemisusedtosupplyoiltoasteamandgasturbineconfiguredintandemeitheronasingleorseparateshaftforenhancedenergyefficiency.1.2Thisspecificationisintendedtodefinethepropertiesofmineralandsyntheticoil-basedturbinelubricatingoilsthatarefunctionallyinterchangeablewithexistingoilsofthistype,arecompatiblewithmostexistingmachinerycomponents,andwithappropriatefieldmaintenance,willmaintaintheirfunc-tionalcharacteristics.1.3Thisspecificationisintendedtodefineonlynewlubri-catingoilbeforeitisinstalledinthemachinery.1.4Thisspecificationisintendedtobeusedasaguide.Itispossiblethatoilsthatdonotmeetthisspecificationmayperformsatisfactorilyinsometurbines.1.5ThisspecificationdoesnotincludeAPIGroupVfluids.Forpolyolesterfluidsusedtolubricateland-basedgasturbines,theuserisreferredtothecurrentversionofmilitaryspecificationMIL-PRF-23699forfluidperformancerequire-ments.Forphosphateesterfluidsusedasturbinelubricantsorsteamturbineelectro-hydrauliccontrol(EHC)fluids,theuserisreferredtothecurrentversionofSpecificationD4293forfluidperformancerequirements.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisinternationalstandardwasdevelope...
