ASTM_D_6175_-_03_2019.pdf

Designation:D617503(Reapproved 2019)Standard Test Method forRadial Crush Strength of Extruded Catalyst and CatalystCarrier Particles1This standard is issued under the fixed designation D6175;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.1.Scope1.1 This test method covers and is suitable for determiningthe resistance of extruded catalysts and catalyst carriers tocompressive force from the side.1.2 This test method was developed using extruded catalystand catalyst carriers from116to18in.in diameter(0.159 to0.318 cm)and limited to pieces with a length to diameter ratiogreater than or equal to 1:1.This test method may be applicableto other diameters.1.3 This test method is suitable for the determination ofmean crush strength per millimetre in the range of 0 to15 lbf mm(0 to 65 Nmm).1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 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:2D3766 Terminology Relating to Catalysts and CatalysisE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 DefinitionsSee Terminology D3766.3.2 Definitions of Terms Specific to This Standard:3.2.1 extruded catalyst particlescylindrical particles withuniform cross sections,either solid,hollow core,or multi-lobed,formed by extrusion.4.Summary of Test Method4.1 Individual extrudates taken from a representativesample are calcined,measured in length,placed between twoflat surfaces,and subjected to a compressive force.The forcerequired to crush the extrudate is measured.The procedure isreplicated,the force per millimetre calculated,and the averageof all quotients determined.5.Significance and Use5.1 This test method is intended to provide information onthe ability of an extruded catalyst to retain physical integrityduring use.6.Apparatus6.1 A suitable compression testing device is required,com-posed of the following:6.1.1 Calibrated Pressure or Force Gage,marked for directreading of the force in pounds force(Newtons)with a rangeabout two times the expected average force reading.A suitablesystem(mechanical,hydraulic,or pneumatic)must be pro-vided so that the rate of force applied is both uniform andcontrollable within specified limits(see 9.4).6.1.2 Tool Steel Anvils,between which the sample will becrushed.The faces of the tool steel anvils shall be smooth andfree from hollows or ridges that would interfere with uniformcontact along the length of the extrudate.The faces shall beparallel to each along their entire length of travel.The faces ofboth anvils must be longer in one dimension than the length ofthe sample pieces to be crushed.1This test method is under the jurisdiction of ASTM Committee D32 onCatalysts and is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical Properties.Current edition approved April 1,2019.Published April 2019.Originallyapproved in 1998.Last previous edition approved in 2013 as D617503(2013).DOI:10.1520/D6175-03R19.2For 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.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 6.2 A device for determining length,reading in millimetres,and of suitable accuracy to measure to the nearest tenth.7.Sampling7.1 A test sample of 50 to 200 individual particles shall beobtained from larger composites by riffling or splitting accord-ing to STP 4