ASTM_D_3175_-_17.pdf

Designation:D317517Standard Test Method forVolatile Matter in the Analysis Sample of Coal and Coke1This standard is issued under the fixed designation D3175;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the 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.Scope*1.1 This test method covers the determination of the gas-eous products,exclusive of moisture vapor,as volatile matterin the analysis sample of coal or coke from coal.1.2 The test method for the determination of volatile matteris empirical.1.3 UnitsThe values stated in SI units are to be regardedas standard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD388 Classification of Coals by RankD2013 Practice for Preparing Coal Samples for AnalysisD3173/D3173M Test Method for Moisture in the AnalysisSample of Coal and CokeD3180 Practice for Calculating Coal and Coke Analysesfrom As-Determined to Different BasesD5142 Test Methods for Proximate Analysis of the AnalysisSample of Coal and Coke by Instrumental Procedures(Withdrawn 2010)3D6374 Test Method for Volatile Matter in Green PetroleumCoke Quartz Crucible ProcedureD3173/D3173M Test Method for Moisture in the AnalysisSample of Coal and CokeD7582 Test Methods for Proximate Analysis of Coal andCoke by Macro Thermogravimetric AnalysisE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 poppingunseating of the crucible cover due to swell-ing of the test sample resulting in mechanical loss of the testmaterial.3.1.1.1 DiscussionThis phenomenon is normally associ-ated with strongly swelling coals.3.1.2 sparkingthe evolution of gaseous products at a ratesufficient to mechanically carry solid particles out of thecrucible.Those particles escaping at higher temperaturesbecome incandescent when they are emitted,creating sparks.3.1.2.1 DiscussionThis phenomenon is normally associ-ated with non-swelling coals but can also be associated withswelling coals as well as cokes.3.1.3 swellingthe change in volume which takes placewhen coal is heated under conditions allowing the softenedcoal to expand freely in a direction normal to the plane ofheating.3.2 Refer to Terminology D121 for additional definitions ofterms used in this test method.4.Summary of Test Method4.1 Volatile matter is determined by establishing the massloss resulting from heating a coal or coke under rigidlycontrolled conditions.The measured mass loss,corrected formoisture as determined in Test Method D3173/D3173M estab-lishes the volatile matter content.Two procedures are describedto permit conformity with differences in sample behavior.4.2 In this empirical test method,the use of platinumcrucibles shall be considered the standard reference method forvolatile matter.Platinum crucibles shall be used in determiningthe volatile matter determined for classification of coals byrank.Volatile matter determinations by some laboratories usingalternate nickel-chromium alloy crucibles having the physical1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.21 on Methods ofAnalysis.Current edition approved Feb.1,2017.Published March 2017.Originallyapproved in 1973.Last previous edition approved in 2011 as D3175 11.DOI:10.1520/D3175-17.2For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 dimensions specified in 6.1 have been shown to differ fromthose obtained using platinum crucibles.A laboratory utilizingnickel-chromium crucibles shall first determine if a relativebias exists between the use of nickel-chromium and