1、Designation:D504820aStandard Test Method forMeasuring the Comparative Burning Characteristics andResistance to Burn-Through of Solid Plastics Using a125-mm Flame1This standard is issued under the fixed designation D5048;the number immediately following the designation indicates the year oforiginal a
2、doption 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 labo
3、ratory procedures to be used to determinethe relative burning characteristics and the resistance to burn-through of plastics using small bar and plaque specimensexposed to a 125-mm(500-W nominal)flame.1.1.1 Use Test Method D3801 for assessing comparativeburning characteristics of solid plastics in a
4、 vertical position.NOTE1This test method is equivalent to IEC 60695-11-20 and UL 94(Section 9).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 us
5、e in the end-product that conforms withthe standards applicable to such end-product.1.3 The classification system described in Appendix X1 isintended for quality assurance and the preselection of compo-nent materials for products.1.4 If found to be appropriate,it is suitable to apply therequirements
6、 to other nonmetallic materials.Such applicationis outside the scope of this technical committee.1.5 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.1.6 This standard is used to measure and describe theresponse of materi
7、als,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.1.7 This standard does not purport to address all of thesafety concer
8、ns,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.See 6.1.1 for a specific hazard statement.1.8 This international standard
9、 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.Reference
10、d Documents2.1 ASTM Standards:2D883 Terminology Relating to 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 Confi
11、rmation of 20mm(50W)and125mm(500W)Test Flames for Small-Scale BurningTests on Plastic 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 Condu
12、cting Equivalence Tests for Com-paring Testing Processes2.2 IEC Standard:3IEC 60695-11-20 Fire Hazard Testing-Part 11-20:TestFlames-500 W Flame Test Methods2.3 ISO Standards:4ISO 13943 Fire SafetyVocabulary1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct
13、 responsibility of Subcommittee D20.30 on Thermal Properties.Current edition approved Sept.1,2020.Published September 2020.Originallyapproved in 1990.Last previous edition approved in 2020 as D5048 20.DOI:10.1520/D5048-20A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact
14、ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Publications of the International Electrotechnical Commission(IEC)areavailable from American National Standards Institute(ANSI),25 W.43rd St.,
15、4thFloor,New York,NY 10036,http:/www.ansi.org.4Available 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
16、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.12.4 UL Standards:5UL 94 Standard for Tests for Flammability of Plastic Mate-rials for Parts in Devices and Appliances3.Terminology3.1 Definitions