ASTM_D_635_-_22.pdf

Designation:D63522Standard Test Method forRate of Burning and/or Extent and Time of Burning ofPlastics in a Horizontal Position1This standard is issued under the fixed designation D635;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 test method covers a small-scalelaboratory screening procedure for comparing the relativelinear rate of burning or extent and time of burning,or both,ofplastics in the form of bars,molded or cut from sheets,plates,or panels,and tested in the horizontal position.NOTE1This test method,and test method A of IEC 60695-11-10 aretechnically equivalent.NOTE2For additional information on materials which do not burn tothe first reference mark by this test,see Test Method D3801.1.2 This test method was developed for polymeric materialsused for parts in devices and appliances.The results areintended to serve as a preliminary indication of their accept-ability with respect to flammability for a particular application.The final acceptance of the material is dependent upon its usein complete equipment that conforms with the standard appli-cable to such equipment.1.3 The classification system described in Appendix X1 isintended for quality assurance and the preselection of compo-nent materials for products.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard is used to measure and describe theresponse of materials,products,or assemblies to heat andflame under controlled conditions,but does not by itselfincorporate all factors required for fire hazards or fire riskassessment of materials,products,or assemblies under actualfire conditions.1.6 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.For specific hazards statements,see 9.2.1.7 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 TestingD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD883 Terminology Relating to PlasticsD1929 Test Method for Determining Ignition Temperatureof PlasticsD2843 Test Method for Density of Smoke from the Burningor Decomposition of PlasticsD3801 Test Method for Measuring the Comparative BurningCharacteristics of Solid Plastics in a Vertical PositionD5025 Specification for Laboratory Burner Used for Small-Scale Burning Tests on Plastic MaterialsD5207 Practice for Confirmation of 20-mm(50-W)and125-mm(500-W)Test Flames for Small-Scale BurningTests on Plastic MaterialsE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE176 Terminology of Fire StandardsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE2935 Practice for Evaluating Equivalence of Two TestingProcesses1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.30 on Thermal Properties(Section D20.30.03).Current edition approved July 1,2022.Published July 2022.Originally approvedin 1941.Last previous edition approved in 2018 as D635 18.DOI:10.1520/D0635-22.2For 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.12.2 IEC Standards:3IEC 60695-11-10 Fire Hazard TestingPart 11-10 TestFlames50W Horizontal and Vertical Flame Test Meth-ods2.3 ICC Codes:4IBC International Building Code(2024)3.Terminology3.1 Definitions:3.1.1 Terms used in this test meth