Designation:D8353−20StandardGuideforDeterminationofIndividualParticleStrengthofLowSurfaceAreaCatalystsandCatalystCarriersbyDropTestontoaSteelPlate1ThisstandardisissuedunderthefixeddesignationD8353;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Theresistancetobreakageofformedcatalysts,catalystcarriers,orcatalystpiecesisdeterminedbydroppingaquantityofsamplethrougha25ftlengthof1in.internaldiameterpipeontoasteelplate.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3766TerminologyRelatingtoCatalystsandCatalysisD4058TestMethodforAttritionandAbrasionofCatalystsandCatalystCarriersD7084TestMethodforDeterminationofBulkCrushStrengthofCatalystsandCatalystCarriers2.2OtherASTMDocuments:3STP447AManualonTestSievingMethodsIEEE/ASTM10AmericanNationalStandardforMetricPractice3.Terminology3.1Definitions—SeeTerminologyD3766.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1lowsurfacearea,n—describesmaterialwithmeasuredsurfaceareasoflessthan10m2/g(seeIEEE/ASTM10).4.SummaryofGuide4.1Theresistancetobreakageofformedcatalysts,catalystcarriers,orcatalystpiecesisdeterminedbydroppingaquantityofsamplethrougha25ftpipeof1in.internaldiameterontoasteelplate.Particlestrengthismeasuredonapass(nobreakage)orfail(breakage)basisandiscalculatedaspercent-agepassi...
