1、Designation:D474987(Reapproved 2012)Standard Test Method forPerforming the Sieve Analysis of Coal and Designating CoalSize1This standard is issued under the fixed designation D4749;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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 test method covers proced
3、ures for determining thesieve analysis of coal and designating the size of coal fromsieve analysis data.Raw as well as prepared(crushed,cleanedor screened)coals can be tested by this test method.1.2 This test method explains how to designate coal sizesfrom the results of sieve analysis data in order
4、 to represent thecondition of the coal as sold.In the case of special mixtures orcoals with noncontinuous ranges of sizes,a sufficiently com-plete sieve analysis must be made to properly describe the sizedistribution.1.3 This test method is not applicable for determining thesieve analysis nor for de
5、signating the size of pulverized coal.(See Note 1.)Size fractions down to and including 38 m(No.400 U.S.A.Standard Series)can be treated by the methodsdiscussed in this test method.Methods for handling sizefractions below 38 m(No.400)will be developed by thiscommittee.NOTE1For powdered or pulverized
6、 coal as is fired into steam boilers,refer to Test Method D197.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.The values stated in each system may not be exactequivalents;therefore,each system must be used indepen-dently of the
7、 other,without combining values in any way.1.5 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 and health practices and determine the applica-bility of regulatory
8、limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D197 Test Method for Sampling and Fineness Test ofPulverized CoalD346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD388 Classification of Coals by RankD2013 Practice for Preparing Coal Samples for Ana
9、lysisD2234/D2234M Practice for Collection of a Gross Sampleof CoalD3302 Test Method for Total Moisture in CoalD4371 Test Method for Determining the Washability Char-acteristics of CoalE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE323 Specification for Perforated-Plate Sieves for T
10、estingPurposes2.2 Other Document:Specification C-80 Commonwealth of Pennsylvania,Depart-ment of General Services,Bureau of Purchases,Specifi-cation for Coal:Anthracite33.Descriptions of Terms Specific to this Standard3.1 as-mined coalsame as ROM coal(3.8).3.2 as-shipped or produced coalraw or prepar
11、ed coal inany state or condition at which it leaves the mine property orloading facility.3.3 bottomsize,nominalthe sieve designating the lowerlimit or bottomsize shall be that sieve of the series given inSection 6 with the largest openings through which passes atotal of less than 15%of the sample.Th
12、is defined bottomsizeis not to be confused with the size of the smallest particles inthe lot.(WarningIn the case of a commercial,double-screened product,for example,37.5 by 9.5 mm(112by38in.),1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsi
13、bility of Subcommittee D05.07 on PhysicalCharacteristics of Coal.Current edition approved Sept.1,2012.Published November 2012.Originallyapproved in 1987.Last previous edition approved in 2007 as D474987(2007).DOI:10.1520/D4749-87R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,
14、orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Commonwealth of Pennsylvania,Dept.of General Services,Bureau of Purchases,414 N.Office Building,Harrisburg,PA 17125.C
15、opyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 this designation may not be valid.In such commercial orcontractual situations,the amount of allowable materialsmaller than the bottomsize(for example,9.5 mm)must bespecified by the contract u
16、nder which the coal is bought andsold.)3.4 dry sievingfor the purposes of this test method,the testmethod for the sieving of coal after the sample has beenair-dried under prescribed conditions;this is generally usedwhen testing with coal particles larger than 600 m.(No.30U.S.A.Standard Sieve Series.)3.5 openingfor the purpose of this test method,openingsand apertures shall be regarded as synonomous terms.Dimen-sions for round and square openings shall be determined asfollows:for round holes,dime
