Designation:D1937−21StandardTestMethodforCarbonBlack,Pelleted—MassStrength1ThisstandardisissuedunderthefixeddesignationD1937;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthemassstrengthofpelletedcarbonblack.Itisdesignedtodeterminetheforcerequiredtopackacylindricalcolumnofpelletedcarbonblack.Theresultsofthistestarebelievedtorelatetotheabilityofthecarbonblacktoflowinbulkhandlingsystems.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1799PracticeforCarbonBlack—SamplingPackagedShipmentsD1900PracticeforCarbonBlack—SamplingBulkShip-mentsD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustries3.SummaryofTestMethod3.1Asampleofcarbonblackisplacedinaverticalcylinderandpressedwithaplungerfor10safterwhichthebottomofthecylinderisopened,whereuponallofthecarbonblackeitherfallsoutthebottomorformsaringorbridgeinthecylinder.Theprocessisrepeatedwithanewsampleuntiltheminimumforcerequiredforthecarbonblacktoformaringorbridgeisfound.TheresultantforceiscalledmassstrengthandisreportedinNewtons.4.SignificanceandUse4.1Massstrengthgivesanindicationoftheflow...
