ASTM_D_4986_-_22.pdf

Designation:D498622Standard Test Method forHorizontal Burning Characteristics of Cellular PolymericMaterials1This standard is issued under the fixed designation D4986;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.Scope*1.1 This fire-test-response standard contains a test methodfor small-scale laboratory procedures to be used to determinethe relative rate of burning and the extent and time of burningof horizontally oriented cellular polymeric materials having adensity less than 250 kg/m3.1.2 The results are intended to serve as a preliminaryindication of their acceptability with respect to flammability fora particular application.The final acceptance of the material isdependent upon its use in the end-product that conforms withthe standards applicable to such end-product.1.3 The classification system described in the Appendix X1is intended for quality assurance and the preselection ofcomponent materials for products.1.4 This standard 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.1.5 The values stated in SI units are to be regarded asstandard.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 a specific hazard statement,see 6.1.1.1.7 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.NOTE1This test method is equivalent to ISO 9772.1.8 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:2D883 Terminology Relating to PlasticsD1622 Test Method for Apparent Density of Rigid CellularPlasticsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD5025 Specification for Laboratory Burner Used for Small-Scale Burning Tests on Plastic MaterialsE176 Terminology of Fire StandardsE456 Terminology Relating to Quality and StatisticsE2016 Specification for Industrial Woven Wire Cloth2.2 ISO Standard:3ISO 9772 Cellular PlasticsDetermination of HorizontalBurning Characteristics of Small Specimens Subjected toa Small FlameISO 13943 Fire SafetyVocabulary3.Terminology3.1 Definitions:3.1.1 For definitions of terms relating to plastics,the defi-nitions in this test method are in accordance with TerminologyD883.For terms relating to fire,the definitions in this testmethod are in accordance with Terminology E176 andISO 13943.In case of conflict,the definitions given in Termi-nology E176 shall prevail.For terms relating to precision andbias and associated issues,the terms used in this test methodare in accordance with the definitions in Terminology E456.3.2 Definitions of Terms Specific to This Standard:3.2.1 afterflame,nflame that persists after the ignitionsource has been removed.1This 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 May 1,2022.Published May 2022.Originallyapproved in 1989.Last previous edition approved in 2020 as D4986 20.DOI:10.1520/D4986-22.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.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.13.2.2 afterflame time,nthe length of time for which amaterial continues to flame,under specified conditions,afterthe ignition source has been removed.3.2.3 afterglow,npers