Designation:D6347/D6347M−05(Reapproved2010)StandardTestMethodforDeterminationofBulkDensityofCoalUsingNuclearBackscatterDepthDensityMethods1ThisstandardisissuedunderthefixeddesignationD6347/D6347M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONDataobtainedfromthedensityofcoalstockpilesiscombinedwithvolumedeterminationsperTestMethodD6172tocompletethephysicalinventoryoftotaltons.Thebookinventoryiscomparedtothephysicalinventoryfordeterminingtheaccumulationofmeasurementdifferencethathaveoccurredsincethelastphysicalinventory.Sincethephysicalinventoryisthereferencevalueusedtocompareandadjustthebookinventory,itisimportantthatthestandardmethodsforconductingthedensityandvolumemeasurementsintroducetheleastpossibleerror.Closeadherencetothedetailsoftheproceduresdescribedinthisstandardisaprerequisitetotheobjectiveofthistestmethod.Thisstandardtestmethodfordeterminationofbulkdensityofstockpiledcoalisusedforallranksofcoal.Properdensitydeterminationinvolvesanunderstandingofthephysicalcharacteristicsofthecoaltypesandthestockpilingfacilities.1.Scope1.1Thistestmethodcoversproceduresfordeterminingthebulkdensityofcoalusinginstrumentationthatmeasurestherelativebackscatterofnucleargammaradiationthroughoutthedepthofthestockpileundertest.1.2Thisprocedureisapplicabletoallranksofcoal.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitations...
