ASTM_D_3675_-_22.pdf

Designation:D367522Standard Test Method forSurface Flammability of Flexible Cellular Materials Using aRadiant Heat Energy Source1This standard is issued under the fixed designation D3675;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 is a fire test response standard.1.2 This test method describes the measurement of surfaceflammability of flexible cellular materials.1.3 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.1.4 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.1.5 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.1.6 Specific information about hazards is given in Section 7.NOTE1There is no known ISO equivalent to this standard.1.7 The values stated in SI units are to be regarded as thestandard.The values stated in inch-pound units,in parentheses,are for information only and are approximations(see alsoIEEE/ASTM SI-10).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 PlasticsE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE162 Test Method for Surface Flammability of MaterialsUsing a Radiant Heat Energy SourceE176 Terminology of Fire StandardsE456 Terminology Relating to Quality and StatisticsE1317 Test Method for Flammability of Surface FinishesE1321 Test Method for Determining Material Ignition andFlame Spread PropertiesE1546 Guide for Development of Fire-Hazard-AssessmentStandardsIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System2.2 ISO Standards:3ISO 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 E456.3.1.2 flame front,nthe leading edge of a flame propagat-ing through a gaseous mixture or across the surface of a liquidor solid.3.2 Definitions of Terms Specific to This Standard:3.2.1 flashing,nflame fronts of three seconds or less induration.3.2.2 radiant panel index,Is,nthe product of the flamespread factor,Fsand the heat evolution factor,Q.4.Summary of Test Method4.1 This test method of measuring surface flammability offlexible cellular materials employs a radiant panel heat sourceconsisting of a 300 by 460-mm(12 by 18-in.)panel in front of1This 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 March 15,2022.Published March 2022.Originallyapproved in 1978.Last previous edition approved in 2021 as D3675 21a.DOI:10.1520/D3675-22.2For 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 International Standardization Organization,P.O.Box 56,CH-1211;Geneva 20,Switzerland.*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.1which an inclined 150 by 460-mm(6 by 18-in.)specimen ofthe material is placed.The orientation of the specimen is suchthat ignition is forced near its upper ed