Designation:D1837−11StandardTestMethodforVolatilityofLiquefiedPetroleum(LP)Gases1ThisstandardisissuedunderthefixeddesignationD1837;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodisameasureoftherelativepurityofthevarioustypesofliquefiedpetroleum(LP)gasesandhelpstoensuresuitablevolatilityperformance.Thetestresults,whenproperlyrelatedtovaporpressureanddensityoftheproduct,canbeusedtoindicatethepresenceofbutaneandheaviercomponentsinpropanetypeLP-gas,andpentaneandheaviercomponentsinpropane-butaneandbutanetypefuels.ThepresenceofhydrocarboncompoundslessvolatilethanthoseofwhichtheLP-gasisprimarilycomposedisindicatedbyanincreaseinthe95%evaporatedtemperature.1.2Whenthetypeandconcentrationofhigherboilingcomponentsisrequired,chromatographicanalysisshouldbeused.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4WARNING—Mercuryhasbeendesignatedbymanyregulatoryagenciesasahazardousmaterialthatcancausecentralnervoussystem,kidneyandliverdamage.Mercury,oritsvapor,maybehazardoustohealthandcorrosivetomaterials.Cautionshouldbetakenwhenhandlingmercuryandmercurycontainingproducts.SeetheapplicableproductMa-terialSafetyDataSheet(MSDS)fordetailsandEPA’swebsite—http://www.epa.gov/mercury/faq.htm—foraddi-tionalinformation.Usersshouldbeawarethatsellingmercuryand/ormercurycontainingproductsintoyourstateorcountrymaybeprohibitedbylaw.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D96TestMethodforWaterandSedimentinCrudeOilbyCentrifugeMethod(FieldProcedure)(Withdrawn2000)3D1796...
