1、Designation:D2013/D2013M21Standard Practice forPreparing Coal Samples for Analysis1This standard is issued under the fixed designation D2013/D2013M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in
2、 parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice2covers the reduction and division of grossor divi
3、ded samples,and the preparation of composite samples,up to and including the individual portions for laboratoryanalysis.1.2 Reduction and division procedures are prescribed forcoals of the following groups:1.2.1 Group A includes coals that have been cleaned in allsizes.1.2.2 Group B includes all oth
4、er coals.Unknown coals areto be considered under Group B.1.2.3 Group A allows smaller weight laboratory samples tobe retained than Group B.These lower weights may be used forparticular coals if they have been shown,by using theprocedures of A1.2,to give a sample preparation and analysisvariance whic
5、h is no more than 20%of the total analysisvariance.1.3 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,to ensure conformance with the standard,eachsystem shall be
6、used independently of the other,and valuesfrom the two systems shall not be combined.1.4 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 p
7、ractices and deter-mine the applicability of regulatory limitations prior to use.1.5 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
8、and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D121 Terminology of Coal and CokeD2234/D2234M Practice for Collection of a Gross Sampleof CoalD3173/D3173M Test Method for Moisture in the AnalysisSample of
9、Coal and CokeD3174 Test Method for Ash in the Analysis Sample of Coaland Coke from CoalD3180 Practice for Calculating Coal and Coke Analysesfrom As-Determined to Different BasesD3302/D3302M Test Method for Total Moisture in CoalD4749 Test Method for Performing the Sieve Analysis ofCoal and Designati
10、ng Coal SizeD7430 Practice for Mechanical Sampling of CoalD7582 Test Methods for Proximate Analysis of Coal andCoke by Macro Thermogravimetric AnalysisE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Termino
11、logy Relating to Quality and Statistics2.2 ISO Standard:4ISO 13909 Hard Coal and CokeMechanical Sampling3.Terminology3.1 Definitions of Terms Specific to This StandardNoterms are used which are specific to this practice.Many termsused in this practice may be found in Terminologies D121 andE456 and i
12、n Practice E177.4.Summary of Practice4.1 Three processes of sample division and reduction arecovered as follows:1This practice is under the jurisdiction of ASTM Committee D05 on Coal andCoke and is the direct responsibility of Subcommittee D05.23 on Sampling.Current edition approved Oct.1,2021.Publi
13、shed December 2021.Originallyapproved in 1962.Last previous edition approved in 2020 as D2013/D2013M 20.DOI:10.1520/D2013_D2013M-21.2For more detailed explanation of this practice,see Keller,G.E.,“Determinationof Quantities Needed in Coal Sample Preparation and Analysis,”Transactions,Vol232,1965,pp.
14、218226.3For 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.4Available from International Organization for Standardizat
15、ion(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.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 internation
16、ally 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?4.1.1 Procedure AManual riffles are used for division ofthe sample and mechanical crushing equipment for the reduc-tion of the sample.4.1.2 Procedure BMechanical sample dividers are usedfor the division of the sample and mechanical crushingequipment for th
