ASTM_D_3713_-_95_scan.pdf

STD.ASTfl D3713-ENGL 1995 0759530 0650b162 562 I I 4ib Designation:D 3713-95 An American National Standard Standard Test Method for Measuring Response of Solid Plastics to Ignition by a Small Flame This standard is issued under the k e d designation D 371 3;the number immediately foiiowing the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This is a fre-test-response standard.1.2 This test method covers a small-scale procedure for characterizing the response of a plastic to an ignition source consisting of a small flame of controlled intensity applied to the base of a standard sample being held in a vertical position.1.3 This standard should be used to measure and describe the reponse of materials,products,or assemblies to heat and flame under controlled conditions and should not be used to describe or appraise the fire hazard or$re risk o f materials,products,or assemblies under actual fire conditions.How-ever,results of this test may be used in a fire hazard assessment or afire risk assessment which takes into account all of the factors which are pertinent to an assessment of the jre hazard or fire risk of a particular end use.1.4 The values stated in SI units are to be regarded as the standard.NOTE l-See Method D 3801 which,unless otherwise specified,uses the same specimens for measwing the comparative extinguishing characteristics of solid plastics when tested in a vertical position.1.5 This standard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user o f this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific hazard statements are given in 10.1.NOTE 2-There is no similar or equivalent IS0 standard.2.Referenced Documents 2.1 ASTM Standards:D 6 18 Practice for Conditioning Plastics and Electrical D 883 Terminology Relating to Plastics2 D3801 Method for Measuring the Comparative Extin-guishing Characteristics of Solid Plastics in a Vertical Position3 Insulating Materials for Testing2 E 176 Terminology Relating to Fire Standards4 This test method i s under the jurisdiction of ASTM Committee D-20 on Plastics and is the direct responsibility of Subcommittee D20.30 on Thermal Properties(Section D20.30.03).Current edition approved Feb.15,1995.Published Apd 1995.OnpinaUy publishedasD3713-78.Last previ0useditionD3713-78(1988).This edition was updated to meet current Blue Book guidelines.2 Annual Book of ASTM Standatds,Vol 08.01.3 Annual Book 0fASTM Standat&,Vol 08.02.Annual Book ofASTM Standatds,Vol 04.07.3.Terminology 3.1 For definitions of terms used in this test method refer to the terminology contained in Terminologies D883 or E 176.3.2 Descriptions o f Terms SpeciJic to This Standard:3.2.1 burning(B)-that mode of response where the flaming or glowing combustion,or both,exceeds 30 s after the burner is removed but the specimen is neither consumed nor produces dripping ignition of cotton.3.2.2 burning time-that interval of time beginning im-mediately after removal of the burner flame and lasting until flaming and glowing combustion cease.The burning time,therefore,is the sum of the flame and glow times.3.2.3 consumed(C)-that mode of response where com-bustible material in the specimen is totally consumed in 30 s or less,after the burner is removed(except for that portion of the specimen in the clamp).Immediately terminate the test if this condition occurs at any point during the test,and record the IR1 as“C at(sample thickness),”signisring the material in the designated thickness cannot be evaluated by this method.3.2.4 dripping ignition(DI)-that mode of response where the sample produces flaming droplets igniting cotton placed 305 mm(1 2 in.)below,either during flame impingement,or within 30 s after the burner is removed.Continued combus-tion of the specimen after dripping ignition is ignored unless the specimen is totally consumed in less than 30 s,in which case the IR1 is reported as“C”.3.2.5 dripping,no ignition(D)-that mode of response where the materials drip when tested in accordance with 10.8 but do not ignite cotton.They are assigned an IRI of D at t.3.2.5.1 Discussion-The flame impingement time is not included in the IR1 for materials displaying“D-type be-havior because time is not an end point.The end point is the dripping(without ignition of cotton)whenever it occurs,subject to the maximum flame impingement time restriction of 60 s.3.2.6 endpoint-the point at which the burning time of the sample exceeds 30 s after the burner is removed;the material drips,with or without ignition of cotton,either during the flame application or within 30 s after the burner is removed;or the combustible material in the specimen is tota