1、Designation:D420696(Reapproved 2013)Standard Test Method forSustained Burning of Liquid Mixtures Using the Small ScaleOpen-Cup Apparatus1This standard is issued under the fixed designation D4206;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 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.INTRODUCTIONThis test method may be used in conjunction with a flash point determination.If the flash point ofa
3、mixture of flammable and nonflammable liquids or liquids of widely different flash points is belowthe upper limit of a flammability classification(for example,100F specified by the U.S.Departmentof Transportation),this test may be conducted to determine the sustained burning characteristics of themi
4、xture.This test method is a modification of the test for combustibility now incorporated as Schedule 2 ofthe“Highly Flammable Liquids and Liquified Petroleum Gases Regulation,1972”of the UnitedKingdom under The FactoriesAct,1961,which is also issued as British Standard BS-3900,PartA-11,Small Scale T
5、est for Combustibility.This sustained burning test was studied and proposed by theASTM Coordinating Committee for Flash Point and Related Properties.The major purpose of this testis similar to that of the British testto provide a method for determining the sustained burningcharacteristics by directl
6、y observing this property rather than by deducing them from the flash point.1.Scope1.1 This test method2describes a procedure for determiningthe sustained burning characteristics of mixtures of flammableand nonflammable liquids and to mixtures containing liquidswith widely different flash points.1.2
7、 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard should be used to measure and describethe response of materials,product
8、s,or assemblies to heat andflame under controlled conditions and should not be used todescribe or appraise the fire-hazard or fire-risk of materials,products,or assemblies under actual fire conditions.However,results of the test may be used as elements of a fire-hazardassessment or a fire-risk asses
9、sment which takes into accountall of the factors which are pertinent to an assessment of thefire hazard or fire risk of a particular end use.1.4 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
10、establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 British Standards:3BS-3900 Part A-11,Small Scale Test for Combustibility3.Summary of Test Method3.1 A block of aluminum alloy,or other nonrusting metal
11、 ofsuitable heat conductivity,with a concave depression(calledthe well)is heated to the required temperature of 120F(49C).A standard source of flame,capable of being swung over thecenter of the well and at a given distance from it,is attached tothe metal block.3.2 Two millilitres of the product unde
12、r test are transferredto the well.After the product has reached the statedtemperature,the flame is passed over the well,held there for aspecified time,and then removed.The time of sustainedburning is then noted.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coa
13、tings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1982.Last previous edition approved in 2007 as D4206 96(2007).DOI:10.1520/D4206-96
14、R13.2McKelvie,A.N.,“A Test for Ability to Support Combustion for LiquidsIncluding Paints and Allied Products,”Journal of Oil Co.Chemical Assoc.,1972,Vol 55,pp.10861095.3Available from British Standards Institute(BSI),389 Chiswick High Rd.,London W4 4AL,U.K.,http:/www.bsi- orAmerican National Standar
15、dsInstitute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 Mixtures of flammable liquids and nonflammableliquids,such as an alcohol and water mi
16、xture,are classified bythe U.S.Government by the definition of flammable liquidbased on a closed-cup flash point method.Thus,mixtures maybe classed as flammable even though they do not sustainburning.This test method determines the ability of a liquidmixture to sustain burning and,when used with a closed-cupflash point method,indicates the flammability characteristics ofthe mixture.5.Apparatus5.1 Small Scale Open-Cup Apparatus,4or an equivalenttester consisting of a 316 stainless steel block or