1、Designation:D666821Standard Test Method forDiscrimination Between Flammability Ratings of F=0and F=11This standard is issued under the fixed designation D6668;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、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 test method covers a means for the discriminationbetween solid and liquid materials which will not burn in airwhen exposed to a tem
3、perature of 1500 F(815.5 C)for aperiod of 5 min and those which will ignite and burn under thesame conditions.1.2 This test method may be applied to any substance whichis a solid or liquid at ambient temperature and pressure.1.3 The purpose of this test method is to provide a means forthe classifica
4、tion of the flammability hazard of materials ofhazard degrees(F=0)and(F=1)or both,in accordance with thedefinitions of degrees of flammability hazard as defined byNFPA 704(par.3.2.1).1.4 This test method should be used subject to the limita-tions that no single fire hazard property such as flash poi
5、nt,ignition temperature,or the performance under the conditionsof the present method shall be used to describe or appraise thefire hazard or fire risk of a material,product,assembly orsystem under actual fire conditions.Fire hazard propertiesmeasured under controlled laboratory conditions may,nevert
6、heless,be employed to describe properly the response ofmaterials,products,assemblies or systems under said con-trolled conditions.Properties measured under controlled labo-ratory conditions may be used as elements of hazard or riskassessment only when such assessment takes into account all ofthe fac
7、tors that are pertinent to the evolution of the fire hazardof a given situation.1.5 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.1.6 Th
8、is standard is used to predict or provide a quantitativemeasure of the fire hazard from a specified set of fire conditionsinvolving specific materials,products,or assemblies.Thisassessment does not necessarily predict the hazard of actualfires which involve conditions other than those assumed in the
9、analysis.1.7 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to
10、 use.1.8 This international standard 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 TechnicalBarrier
11、s to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D4175 Terminology Relating to Petroleum Products,LiquidFuels,and Lubricants2.2 NFPA Standards:3NFPA 704 Identification of the Hazards of Mater
12、ials forEmergency Response3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 For definitions of terms used in this test method,referto Terminology D4175.3.1.2 burning,nfor the purposes of this test method,burning shall be defined to include the presence of any visibleflame,sparks
13、or glowing embers when the sample is exposed to1500 F(815.5 C)for 5 min under the conditions of the testmethod.Charring withouit visible evidence of flame,sparks,orglowing embers shall not be considered to constitute burning.1This test method is under the jurisdiction of ASTM Committee D02 onPetrole
14、um Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.L0.07 on Engineering Sciences of High Performance Fluids andSolids(Formally D02.1100).Current edition approved Dec.1,2021.Published January 2022.Originallyapproved in 2001.Last previous edition approved in 20
15、16 as D6668 01(2016).DOI:10.1520/D6668-21.2For 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 National
16、 Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.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 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
