1、Designation:D387418Standard Test Method forIgnition of Materials by Hot Wire Sources1This standard is issued under the fixed designation D3874;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 pare
2、ntheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method is intended to differentiate,in apreliminary fashion,among materials with respect to theirresistance to ignition because of their proxi
3、mity to electrically-heated wires and other heat sources.21.2 This test method applies to molded or sheet materialsavailable in thicknesses ranging from 0.25 to 6.4 mm(0.010 to0.25 in.).1.3 This test method applies to materials that are rigid atnormal room temperatures.That is,it applies to material
4、s forwhich the specimen does not deform during preparation,especially during the wire-wrapping step described in 10.1.Examples of deformation that render this test method inappli-cable include:1.3.1 Bowing,in either a transverse or a longitudinaldirection,or twisting of the specimen,during the wire-
5、wrapping step,to a degree visible to the eye.1.3.2 Visible indentation of the wrapped wire into thespecimen.1.4 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses are forinformation only.(See SI10 for further details.)1.5 This test method measur
6、es and describes the response ormaterials,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.1.6 This standard does not
7、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.1.7 Fire testing is inherently
8、hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.NOTE1Although this test method and IEC TS 60695-2-20(withdrawn),differ in approach and in detail,data obtained using eitherare technically equivalent.1.8 This international standard was developed in
9、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 AST
10、M Standards:3D1711 Terminology Relating to Electrical InsulationD6194 Test Method for Glow-Wire Ignition of MaterialsE176 Terminology of Fire StandardsE3020 Practice for Ignition SourcesIEEE/ASTM SI-10 American National Standard for MetricPractice2.2 IEC Standards:IEC TS 60695-2-20 Fire Hazard Testi
11、ngSection 20:Glowing/Hot-wire Based Test Methods,Hot-wire CoilIgnitability Test on Materials(withdrawn)4IEC 60695-4 Fire Hazard TestingPart 4:TerminologyConcerning Fire Tests for Electrotechnical Products42.3 ISO StandardsISO 13943 Fire SafetyVocabulary53.Terminology3.1 Definitions:3.1.1 Use Termino
12、logy E176 and ISO 13943 and IEC60695-4 for definitions of terms used in this test method andassociated with fire issues.Where differences exist in1This test method is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubc
13、ommittee D09.17 on Fire and Thermal Properties.Current edition approved Nov.1,2018.Published November 2018.Originallyapproved in 1988.Last previous edition approved in 2013 as D3874 13.DOI:10.1520/D3874-18.2K.N.Mathes,Chapter 4,“Surface Failure Measurements”,EngineeringDielectrics,Vol.IIB,Electrical
14、 Properties of Solid Insulating Materials,Measure-ment Techniques,R.Bartnikas,Editor,ASTM STP 926,ASTM,Philadelphia,1987.3For 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
15、the standards Document Summary page onthe ASTM website.4Available from International Electrotechnical Commission(IEC),3 rue deVaremb,Case postale 131,CH-1211,Geneva 20,Switzerland,http:/www.iec.ch.5Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale
16、56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.*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 Techn
