1、Designation:D520720Standard Practice forConfirmation of 20-mm(50-W)and 125-mm(500-W)TestFlames for Small-Scale Burning Tests on Plastic Materials1This standard is issued under the fixed designation D5207;the number immediately following the designation indicates the year oforiginal adoption or,in th
2、e 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 practice covers the confirmation of test flames forsmall-scale burning tests on plasti
3、c materials using the labora-tory burner described in Specification D5025.Back pressuresand flow rates for methane,propane,and butane supply gasesare given for specific test flames.This practice describes aprocedure to confirm the heat evolution of the test flame.1.2 The values stated in SI units ar
4、e to be regarded as thestandard.1.3 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 hazard or fire riskassessment of the materials,products,or as
5、semblies underactual fire conditions.NOTE1There is no similar ISO standard.This practice is equivalentin technical content to,but not fully corresponding in presentation with,the confirmatory procedures of IEC/TS 60695-11-3,Method A and IEC/TS 60695-11-4,Method A.1.4 Fire testing is inherently hazar
6、dous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.1.5 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 envi
7、ronmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 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 Standa
8、rds,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 PlasticsD3195 Practice for Rotameter CalibrationD5025 Specification for Laboratory Burner Used for Small-Scale Burnin
9、g Tests on Plastic MaterialsE176 Terminology of Fire StandardsE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification for Temperature-Electromotive Force(emf)Tables for Standardized ThermocouplesE608 Specification for Mineral-Insulated,Metal-SheathedBase Metal The
10、rmocouples2.2 IEC Standards:3IEC 60695-11-3 Fire Hazard Testing Part 11-3:TestFlames 500 W Flames Apparatus and ConfirmationalTest MethodsIEC 60695-11-4 Fire Hazard Testing Part 11-4:TestFlames 50 W Flame Apparatus and ConfirmationalTest Methods3.Terminology3.1 Definitions of Terms:3.1.1 For definit
11、ions of terms related to plastics used in thistest method,refer to Terminology D883.For definitions ofterms related to fire used in this test method,refer to Termi-nology E176.4.Summary of Practice4.1 A test flame of specified height and color is obtainedwith gas supplied at a suggested back pressur
12、e and flow rate.Athermal sensor is then positioned over the flame,and the timefor the temperature of the sensor to increase from 100 to 700Cis determined.The time is used to confirm the heat-evolutionprofile of the test flame.1This practice is under the jurisdiction ofASTM Committee D20 on Plastics
13、andis the direct responsibility of Subcommittee D20.30 on Thermal Properties.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1991.Last previous edition approved in 2014 as D5207 14.DOI:10.1520/D5207-20.2For referenced ASTM standards,visit the ASTM website,www.astm.o
14、rg,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 Summar
15、y 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
16、 Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.Significance and Use5.1 The flame height and color(indicative of air-to-gasratio)for a test flame have traditionally been specified in theindividual test method.The energy content of the flame hasalso been addressed by reference to a specific supply gas.It hasbeen determined that the supply-gas back pressure and flowr
