Designation:D6471−10StandardSpecificationforRecycledPredilutedAqueousGlycolBaseEngineCoolant(50Volume%Minimum)forAutomobileandLight-DutyService1ThisstandardisissuedunderthefixeddesignationD6471;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstherequirementsforarecycledpredilutedaqueousethyleneglycol(50volume%minimum)baseenginecoolantandrecycledpredilutedaqueouspropyleneglycol(50volume%minimum)baseenginecoolantforuseinautomobilesandlight-dutyvehicles.CommitteeD15hasdevelopedthisspecificationusingexperience,knowledgeandresearchfromrecyclingusedaqueousbaseenginecoolantandblendsofusedaqueousbaseenginecoolantandvirginglycol.Thisstandarddoesnotapplytocoolantproducedfromotherglycolsourcessuchasmedicalwaste,distillationbottoms,airplane/airportdeicersandpolyesterproductionwaste.Thisspecificationprovidesaprocedureforevaluatingenginecool-antrecyclingtechnologiesthroughtherecyclingofareferencesyntheticusedenginecoolant.Italsospecifiesthechemical,physical,andperformancerequirementsfortherecycledpre-dilutedaqueousglycolbaseenginecoolantthatisproducedfromthatprocedure.Whenusedwithoutfurtherdilution,thisproductfunctionseffectivelyduringbothwinterandsummer.Thismaterialisintendedtoprovideprotectionagainstfreezing,boiling,andcorrosioninautomobileorotherlight-dutyservicecoolingsystems.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareapproximateequivalentsandprovidedforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D512TestMethodsforChlorideIonInWaterD516TestMeth...
