1、Designation:D520714Standard Practice forConfirmation of 20mm(50W)and 125mm(500W)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 the ca
2、se 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 plastic ma
3、terials 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 are to
4、 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 assemb
5、lies 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 hazardous
6、.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 and health practice
7、s and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD3195 Practice for Rotameter CalibrationD5025 Specification for Laboratory Burner Used for Small-Scale Burning Tests on Plastic MaterialsE176 Termi
8、nology of Fire StandardsE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification and Temperature-Electromotive Force(EMF)Tables for Standardized ThermocouplesE608 Specification for Mineral-Insulated,Metal-SheathedBase Metal Thermocouples2.2 IEC Standards:3IEC/TS 60
9、695-11-3 Ed.1:Fire Hazard Testing-Part 11:TestFlames-Section 3:500 W Flames:Apparatus and Confir-mational Test MethodsIEC/TS 60695-11-4 Ed.2:Fire Hazard Testing-Part 11:TestFlames-Section 4:50 W Flame:Apparatus and Confirma-tional Test Methods3.Terminology3.1 Definitions of Terms:3.1.1 For definitio
10、ns 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 pressure
11、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.5.Significance and Use5.1 The flame height and color(indicative of air-to-ga
12、sratio)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 flowrate can be varied without affecting the height and colo
13、r of the1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.30 on Thermal Properties.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1991.Last previous edition approved in 2009 as D5207 09.DOI:10.1
14、520/D5207-14.2For 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
15、(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 States1 flame.However,the energy content of the flame is affected
16、.This practice provides the back pressure and flow rate of thesupply gas for a 20-mm(50W)and a 125-mm(500W)testflame,and a procedure for confirming the heat-evolutionprofile of the test flame.5.2 Information is provided for test flames using methane,propane,or butane.Using this information,these supply gasescan be used interchangeably with a standardized burner toproduce essentially the same test flame.6.Apparatus6.1 Test Chamber,enclosure or laboratory hood,free ofinduced or forced draft,having