ASTM_D_293_-_D_293M_-_18.pdf

Designation:D293/D293M18Standard Test Method for theSieve Analysis of Coke1This standard is issued under the fixed designation D293/D293M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the separation of a cokesample into defined size fractions and expressing said fractionsas a mass weight percent of the gross sample.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D346/D346M Practice for Collection and Preparation ofCoke Samples for Laboratory AnalysisD4621 Guide for Quality Management in an OrganizationThat Samples or Tests Coal and Coke(Withdrawn 2010)3E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE323 Specification for Perforated-Plate Sieves for TestingPurposes3.Significance and Use3.1 This test method determines the size distribution of cokefor conformance to specifications of percentages retained ondesignated screen sizes.4.Apparatus4.1 SievesUse square-hole sieves conforming to Specifi-cation E11.Where sieves larger than 100 mm 4 in.arerequired,the specifications for same shall be by mutualagreement between interested parties.Permissible variations insieve openings and spacings shall be in accordance withSpecification E11.4.1.1 For complete characterization of the size range of acoke sample,the number and size of the selected sieves shouldbe such that no more than 25%of the gross sample mass orweight will be retained on any given sieve.4.1.2 For coke 38.1 mm 112in.and larger in size,sievesof heavy double-crimped wire and square or rectangular frameswith 0.56 m2to 0.84 m26 ft2to 9 ft2 of sieve area aresatisfactory.For coke smaller than 38.1 mm 112in.in size,sieves of double-crimped wire and square or circular frameswith 0.19 m2to 0.37 m22 ft2to 4 ft2 of sieve area are usuallymore convenient.4.2 Weighing Balance,preferably of the platform type,having a sensitivity of 0.025 kg 0.05 lb or better,at ratedcapacity and with graduations such that 0.05 kg 0.1 lb can beread without interpolation.5.Test Sample5.1 The test sample shall be taken in accordance withPractice D346/D346M.6.Procedure6.1 Starting with the sieve having the largest opening,sievethe sample of coke in quantities small enough to preventplugging and clogging of the sieve.6.1.1 Hand-fit each piece of coke retained on the 38.1 mm112in.or larger sieve.A piece is considered undersize if,insome position and without forcing,it passes the sieve opening.6.1.2 Shake vigorously on each succeeding sieve cokepieces passing the 38.1 mm 112in.sieve.This shaking maybe performed manually or mechanically provided mechanicalshaking yields results equivalent to manual shaking.Note that1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.15 on MetallurgicalProperties of Coal and Coke.Current edition approved Sept.1,2018.Published September 2018.Originallyapproved in 1928.Last previous edition approved in 2010 as D293 93(2010).DOI:10.1520/D0293_D0293M-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 the objectives of shaking,either manual or mechanical,are toplace all of the naturally occurring pieces of