Designation:D1247-54(Reapproved1975)StandardMethodofAmertr;.~nNtcionalS!andltd1.777-1973IR-1963)AI>PlovedMarch21.1973ByAme11conN11onllSund~rdslns1~u1eSAMPLINGMANUFACTUREDGAS1ThisStandardisissuedunderthefi•cddesignation01247:thenumberim~cdiatelyfo\lov.·ingthedesignation.indicatestheyearoforiginaladoptionor,inthecaseofrevision.theyearoflastn:,u,on.Anumbertnparenthesestndtcatestheyearoflastreapproval.I.Scope1.1Thismethodcoverstheproceduresforsecuringrepresentativesamplesofmanufac-turedgas,andcorrelatesthesizeortypeofsamplewiththeanalysistobedonesubse-quentlyonthatsample.NOTE-ThevaluesstatedinU.S.customaryunitsarc10beregardedasthestandard.l.GeneralConsiderations2.1Incollectingsamplesofmanufacturedgas,considerationmustbegiventothepur-posesforwhichthesamplesaretobeusedandtheconditionsunderwhichtheymustbesecured.Considerationmustalsobegiventothevolumeofsamplerequiredforthepurposeintended.tothesizeandlengthofthesam-plingline,andtothesizeanddesignofcon·tainers.Accountmustbetakenofthepossibleconstituentsinthegaswithreferencetoanyactionuponthematerialofwhichthelines,containers,andauxiliaryequipmentarecon·structed.Theprocedureusedshouldbeca-pableofgivingresultsthatcanbeduplicated.Unlessarepresentativesamplehasbeenob-tained,theresultsofanysubsequentanalyt-icaltest.regardlessoftheaccuracyofthetestitself,willbeerroneousandmisleading.3.VolumeofSampleRequired3.1Thevolumeofsamplecollectedisgov-ernedbythetesttobemadeandthemethodtobeused.Thefollowingvolumesaremin-imumamountssufficientfortwodetermina-tionsandnecessarypurging:Chemical~a~analysisFractionattonttasanalysisSpecificgravit)Heatingvalue(Btu)IOOOcm'5to10ft'(0.141to0.283m')Ift'(0.028m'l3to5ft'(0.085TotalsulfurbyReferee·sapparatusDeterminationofammoniaDeterminationofnaphthaleneHydrottensulridcbyTutwetlermethodHydro~en
