ASTMD5771-17StandardTestMethodforCloudPointofPetroleumProductsandLiquidFuels(OpticalDetectionSteppedCoolingMethod)isastandardizedproceduredevelopedbyASTMInternationalfordeterminingthecloudpointofpetroleumproductsandliquidfuels.Thecloudpointisthetemperatureatwhichwaxcrystalsbegintoforminthefuel,causingittoappearcloudy.Thismethodusesopticaldetectiontoidentifythecloudpointasthesampleiscooledincontrolledsteps.Itisparticularlyusefulforevaluatingthelow-temperatureperformanceofdieselfuels,biodieselblends,andothermiddledistillatefuels.Thestandardprovidesdetailedinstructionsforsamplepreparation,equipmentsetup,andthestep-by-stepcoolingprocesstoensureaccurateandreproducibleresults.Compliancewiththismethodhelpsensurefuelqualityandperformanceincoldweatherconditions.
