1、Designation: D6668 01 (Reapproved 2016)Standard 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,
2、 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. Scope1.1 This test method covers a means for the discriminationbetween solid and liquid materials which will not b
3、urn in airwhen exposed to a temperature 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
4、provide a means forthe classification of the flammability hazard of materials ofhazard degrees (F=0) and (F =1) or both, in accordance withthe definitions 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 sing
5、le fire hazard property such as flash point,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 unde
6、r controlled laboratory conditions may,nevertheless, 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
7、 such assessment takes into account all ofthe factors 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 info
8、rmation onlyand are not considered standard.1.6 This 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 whi
9、ch involve conditions other than those assumed in theanalysis.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 and health practices and determine the applica
10、-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)2.2 NFPA Standards:3NFPA 704 Identification of the Hazards of Materials forEmergency Response3. Terminology3.1 Definit
11、ions of Terms Specific to This Standard:3.1.1 burning, nfor the purposes of this test method,burning shall be defined to include the presence of any visibleflame, sparks or glowing embers when the sample is exposed to1500 F (815.5 C) for 5 min under the conditions of the testmethod. Charring withoui
12、t visible evidence of flame, sparks, orglowing embers shall not be considered to constitute burning.3.1.2 flammability hazard degree one (F=1) , nmaterialsthat will burn in air when exposed to a temperature of 1500 F(815.5 C) for 5 min under the conditions of this test method orwhich, by reason of t
13、heir flash point, fire point, autoignitiontemperature, or sustained combustibility, would be rated asHazard Degree One regardless of their performance in this testmethod.3.1.3 flammability hazard degree zero (F=0) , nmaterialsthat will not burn in air when exposed to a temperature of1This test metho
14、d is under the jurisdiction of ASTM Committee D02 onPetroleum 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 Jan. 1, 2016. Published February 20
15、16. Originallyapproved in 2001. Last previous edition approved in 2010 as D6668 01 (2010).DOI: 10.1520/D6668-01R16.2For 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 t
16、he standards Document Summary page onthe ASTM website.3Available from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States11500 F (8
17、15.5 C) for 5 min under the conditions of this testmethod provided that they do not exhibit properties includingflash point, fire point, autoignition, or sustained combustibilitywhich might cause them to be rated or classified as a morehazardous material (that is, F=1 or higher).4. Summary of Test M
18、ethod4.1 Small, measured amounts of the sample are placed on astainless steel surface heated to 1500 F (815.5 C). Reactionswhich occur during the 5 min interval, thereafter, are observedand recorded.5. Significance and Use5.1 A material which does not exhibit any evidence ofburning as defined herein
19、 under the conditions of the testprocedure may be classified as Flammability Degree of HazardZero material (F=0) provided other properties of the materialare not such as to require a higher degree of classification.6. Test Specimen6.1 Liquid Sample30 mL is sufficient for the performanceof this test
20、method.6.2 Solid Specimens30 g are sufficient for the perfor-mance of this test method.7. Apparatus7.1 Flask Heater, 750 W with transformer control heater,stepless, repeatable 60.6 W.47.2 Temperature Readout Device, any potentiometric orelectronic device capable of reading the temperature of achrome
21、l alumel thermocouple within 61 F (0.6 C).7.3 Chromel-Alumel Thermocouple , 24 gauge, welded tocenter of stainless steel planchet.7.4 Stainless Steel Planchet, 26 gauge, 50 mm diameter by12.7 mm deep.7.5 Borosilicate Chimney, 70 mm O.D. by 230 mm highmounted over planchet with 2.5 mm air gap between
22、 bottom ofchimney and top of planchet holder surface.7.6 Planchet Holder, ceramic composite capable of with-standing 1500 F (815.5 C), 127 mm by 127 mm thick with54 mm centrally located hole to hold planchet.4The sole source of supply of the apparatus (Model No. 61600, 750 W, 120 VACwith transformer
23、 heat control) known to the committee at this time is PrecisionScientific, 170 Marcel Dr., Winchester, VA 22602. If you are aware of alternativesuppliers, please provide this information to ASTM Headquarters. Your commentswill receive careful consideration at a meeting of the responsible technicalco
24、mmittee,1which you may attend.FIG. 1 Assembled Test ApparatusD6668 01 (2016)27.7 Ceramic Cord, approximately 0.8 mm diameter to bewrapped around planchet, if needed, to hold it firmly in placein the planchet holder.7.8 Hypodermic Syringe, 0.5 mL with 450 mm 26 gaugeneedle. TFE-fluorcarbon tipped plu
25、nger is preferred.7.9 Assembled Test Apparatus, see Fig. 1.8. Materials8.1 Mineral Spirits, Specification D235, Type 1.8.2 Steel Wool.8.3 Absorbent Tissue.9. Procedure9.1 Rinse interior of planchet with mineral spirits, wipe drywith absorbent tissue.9.2 Set the control transformer to bring the inter
26、ior surfaceof the planchet to 1500 F. Adjust the transformer setting untilthe surface temperature remains at 1500 F 6 10 F (815.5 C6 6 C).9.3 Liquid SamplesIntroduce a 0.1 mL specimen on to theheated planchet surface and observe for evidence of burning asdefined in 3.1.1. If no burning is observed,
27、repeat for 0.2 mL,0.5 mL, and 1.0 mL specimens, as required, to establishwhether burning occurs. If burning is observed for any speci-men size, further investigation with larger specimens is notrequired.9.4 Solid SpecimensIntroduce a 0.1 g specimen on to theheated planchet surface and observe for ev
28、idence of burning asdefined by 3.1.1. If no burning is observed, repeat for 0.2 g,0.5 g, and 1.0 g specimens, as required, to establish whetherburning occurs. If burning is observed for any specimen size,further investigation with larger specimens is not required.9.5 Acomplete test for either liquid
29、 or solid specimens shallinclude duplication of 9.1, 9.2, 9.3,or9.4, or a cominationthereof, as may be required to confirm initial findings.NOTE 1This procedure may be conducted at individual temperatureslower than 1500 F (815.5 C) or at a series of lower temperatures todeterrmine the threshold for
30、burning.Any such variations in test procedureshall be reported.10. Report10.1 Report whether or not burning as defined in 3.1.1occurs at the test temperature.10.2 If no burning occurs, report that the FlammabilityHazard Rating of the sample is zero (F=0) provided that noconflicting properties of the
31、 sample require a higher rating.10.3 If burning occurs, report that the Flammability HazardRating of the sample is one (F=1) provided that no conflictingproperties of the sample require a higher rating.11. Precision and Bias11.1 No information is presented about either precision orbias of Test Metho
32、d D6668 for measuring flammability ratingssince the test result is nonquantitative.12. Keywords12.1 burning; flammability hazards; flammability ratingASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. User
33、s of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every
34、five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technica
35、l committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
36、 PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 01 (2016)3
