ASTM_D_2863_-_19.pdf

Designation:D286319Standard Test Method forMeasuring the Minimum Oxygen Concentration to SupportCandle-Like Combustion of Plastics(Oxygen Index)1This standard is issued under the fixed designation D2863;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 fire-test-response standard describes a procedurefor measuring the minimum concentration of oxygen,ex-pressed as percent volume,that will just support flamingcombustion in a flowing mixture of oxygen and nitrogen.1.2 This test method provides three testing procedures.Procedure A involves top surface ignition,Procedure B in-volves propagating ignition,and Procedure C is a shortprocedure involving the comparison with a specified minimumvalue of the oxygen index.1.3 Test specimens used for this test method are preparedinto one of six types of specimens(see Table 1).1.4 This test method provides for testing materials that arestructurally self-supporting in the form of vertical bars or sheetup to 10.5-mm thick.Such materials are solid,laminated orcellular materials characterized by an apparent density greaterthan 15 kg/m3.1.5 This test method also provides for testing flexible sheetor film materials,while supported vertically.1.6 This test method is also suitable,in some cases,forcellular materials having an apparent density of less than 15kg/m3.NOTE1Although this test method has been found applicable fortesting some other materials,the precision of the test method has not beendetermined for these materials,or for specimen geometries and testconditions outside those recommended herein.1.7 This test method measures and describes the response ofmaterials,products,or assemblies to heat and flame undercontrolled conditions,but does not by itself incorporate allfactors required for fire hazard or fire risk assessment of thematerials,products,or assemblies under actual fire conditions.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 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.Specific hazards statement are given in Section 10.1.10 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.NOTE2This test method and ISO 4589-2 are technically equivalentwhen using the gas measurement and control device described in 6.3.1,with direct oxygen concentration measurement.1.11 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:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1071 Test Methods for Volumetric Measurement of Gas-eous Fuel SamplesD1622 Test Method for Apparent Density of Rigid CellularPlasticsD4802 Specification for Poly(Methyl Methacrylate)AcrylicPlastic SheetD4968 Practice for Annual Review of Test Methods andSpecifications for PlasticsE176 Terminology of Fire StandardsE177 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 Method1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.30 on Thermal Properties.Current edition approved Oct.1,2019.Published October 2019.Originallyapproved in 1970.Last previous edition approved in 2017 as D2863-17a.DOI:10.1520/D2863-19.2For 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.*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