Designation:D6231/D6231M−21StandardSpecificationforHFC-125(Pentafluoroethane,C2HF5)1ThisstandardisissuedunderthefixeddesignationD6231/D6231M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThisspecificationcoverstherequirementsforHFC-125asafire-fightingmedium.1.2Thisspecificationdoesnotaddressthefire-fightingequipmentorhardwarethatemploysHFC-125orthecondi-tionsofemployingsuchequipment,forexample,handhelds,fixedinstallations,etc.1.3ThisspecificationdoesnotaddressthestorageortransportationofHFC-125.Storage,handling,andtransporta-tionissuesareaddressedinPracticeD6268.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequivalents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.5Thefollowingsafetyhazardscaveatpertainstothetestmethodsportion,Section6,ofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenviron-mentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Specifichazardsstatementsaregivenin4.3.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D6268PracticeforHandling,Transportation,andStorageofHFC-125,Pentafluoroethane(C2HF5)D6806PracticeforAnalysisofHalogenatedOrganicSol-ventsandTheirAdmixturesbyGasChromatography2.2U.S.GovernmentStandards:349CFRPart17...
