Designation:D7518−10(Reapproved2015)´1StandardSpecificationfor1,3Propanediol(PDO)BaseEngineCoolantforAutomobileandLight-DutyService1ThisstandardisissuedunderthefixeddesignationD7518;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—CautionstatementinX1.5waschangedtoaWarningstatementeditoriallyinJune2015.1.Scope*1.1Thisspecificationcoverstherequirementsfor1,3pro-panediolbaseenginecoolantsusedinautomobilesorotherlight-dutyservicecoolingsystems.Whenconcentratesareusedat40to70%concentrationbyvolumeinwater,orwhenpredilutedglycolbaseenginecoolants(50volume%mini-mum)areusedwithoutfurtherdilution,theywillfunctioneffectivelytoprovideprotectionagainstfreezing,boiling,andcorrosion.1.2Thecoolantsgovernedbythisspecificationarecatego-rizedasfollows:CoolantTypeDescriptionI1,3PropanediolbaseconcentrateII1,3Propanediolpredilute(50vol%)NOTE1—Thisspecificationisbasedontheknowledgeoftheperfor-manceofenginecoolantspreparedfromneworvirginingredients.NOTE2—Thisspecificationappliestoautomobilesandlight-dutyservice.Aspecificationforheavy-dutyengineserviceisunderdevelop-ment.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D512TestMethodsforChlorideIonInWaterD516TestMethodforSulfateIoninWaterD1119TestMethodforPercentAshContentofEngineCoolantsD1120TestMethodforBoilingPointofEngineCoolantsD1121TestMethodforReserveAlkalinityofEngineCool-antsandAntirustsD1122TestMethodforDensityorRelativeDensityofEngineCoolantConcentratesandEngineCoolantsByTheHyd...
