Designation:D6273−20StandardTestMethodforNaturalGasOdorIntensity1ThisstandardisissuedunderthefixeddesignationD6273;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheproceduresfordeterminingthethresholddetectionlevel,readilydetectablelevel,andodorintensityofnaturalgasusinginstrumentsthatdiluteandmixthesamplednaturalgaswithair.Themixedgasstreamisthensniffedbytheoperatorforthepurposeofdetermininganyoftheseparametersforodorantinanaturalgasstream.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4150TerminologyRelatingtoGaseousFuelsD5287PracticeforAutomaticSamplingofGaseousFuelsE253TerminologyRelatingtoSensoryEvaluationofMate-rialsandProducts2.2OtherStandard:349CFRPart192.625OdorizationofGas3.Terminology3.1FordefinitionsofgeneraltermsusedinD03GaseousFuelsstandards,refertoTerminologyD4150.3.2Fordefinitionsofcommonusagesensoryevaluationofmaterialsandproducts,refertoTerminologyE253.3.3DefinitionsofTermsSpecifictoThisStandard:3.3.1highpressure,n—forthepurposeofthistestmethod,highpressurereferstonaturalgaspressuregreaterthanthemaximuminletpressurespecifiedbythemanufacturerofthegasdilutionapparatus.3.3.2intensity,n—themagnitudeofodorperceivedbytheoperator.3.3.3lowpressure,n—forthepurposeofthistestmethod,lowpressu...
