Designation:D293−93(Reapproved2010)StandardTestMethodfortheSieveAnalysisofCoke1ThisstandardisissuedunderthefixeddesignationD293;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribestheseparationofacokesampleintodefinedsizefractionsandexpressingsaidfractionsasaweightpercentofthegrosssample.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Inch-poundunitsshallbeacceptedonanequivalentbasis.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD4621GuideforQualityManagementinanOrganizationThatSamplesorTestsCoalandCoke(Withdrawn2010)3E11SpecificationforWovenWireTestSieveClothandTestSievesE323SpecificationforPerforated-PlateSievesforTestingPurposes3.SignificanceandUse3.1Thistestmethoddeterminesthesizedistributionofcokeforconformancetospecificationsofpercentagesretainedondesignatedscreensizes.4.Apparatus4.1Sieves—Usesquare-holesievesconformingtoSpecifi-cationE11.Wheresieveslargerthan100mm(4in.)arerequired,thespecificationsforsameshallbebymutualagreementbetweeninterestedparties.PermissiblevariationsinsieveopeningsandspacingsshallbeinaccordancewithSpecificationE11.4.1.1Forcompletecharacterizationofthesizerangeofacokesample,thenumberandsizeoftheselectedsievesshouldbesuchthatnomorethan25%ofthegrosssampleweightwillberetainedonanygivensieve.4.1.2Forcoke38.1mm(11⁄2in.)andlargerinsize,sievesofheavydouble-crimpedwireandsquareorrectangularframeswith0.56to0.84m2(6to9ft2)ofsieveareaaresatisfactory.Forcokesmallerthan38.1mm(11⁄2in.)insize,sievesof...
