1、Designation: D6668 01 (Reapproved 2010)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 1500F (815.5C) 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 pr
4、ovide a means forthe classification 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
5、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 under c
6、ontrolled laboratory conditions may, never-theless, 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 infor
8、mation 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 whic
9、h 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 Definiti
11、ons 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 to1500F (815.5C) for 5 min under the conditions of the testmethod. Charring withouit v
12、isible 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 1500F(815.5C) for 5 min under the conditions of this test method orwhich, by reason of their f
13、lash 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 of1500F (815.5C) for 5 mi
14、n 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).1This test method is under the juris
15、diction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.11 on Engineering Sciences of High Performance Fluids and Solids.Current edition approved May 1, 2010. Published May 2010. Originallyapproved in 2001. Last previous edition approved
16、in 2006 as D6668 01 (2006).DOI: 10.1520/D6668-01R10.2For 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.3Availabl
17、e from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Summary of Test Method4.1 Small, measured amounts of the sample are
18、placed on astainless steel surface heated to 1500F (815.5C). 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 under the conditions of the testprocedure may be cla
19、ssified 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 method.6.2 Solid Specimens30 g are sufficient for the
20、 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 achromel alumel thermocouple within 61F (0.6C).7.3 Chromel-A
21、lumel 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 bottom ofchimney and top of planchet holder surface.7.6
22、 Planchet Holder, ceramic composite capable of with-standing 1500F (815.5C), 127 by 127 mm thick with 54 mmcentrally located hole to hold planchet.7.7 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
23、Syringe, 0.5 mL with 450 mm 26 gaugeneedle. TFE-fluorcarbon tipped plunger 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 drywi
24、th absorbent tissue.4The sole source of supply of the apparatus (Model No. 61600, 750 W, 120 VACwith transformer 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 t
25、o ASTM Headquarters. Your commentswill receive careful consideration at a meeting of the responsible technicalcommittee,1which you may attend.FIG. 1 Assembled Test ApparatusD6668 01 (2010)29.2 Set the control transformer to bring the interior surfaceof the planchet to 1500F. Adjust the transformer s
26、etting untilthe surface temperature remains at 1500 6 10F (815.5 66C).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, repeat for 0.2 mL,0.5 mL, and 1.0 mL specimens, as required, to esta
27、blishwhether 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 evidence of burning asdefined by 3.1.1. If no burning is observed, rep
28、eat for 0.2, 0.5,and 1.0 g specimens, as required, to establish whether burningoccurs. If burning is observed for any specimen size, furtherinvestigation with larger specimens is not required.9.5 Acomplete test for either liquid or solid specimens shallinclude duplication of 9.1, 9.2, 9.3,or9.4, or
29、a cominationthereof, as may be required to confirm initial findings.NOTE 1This procedure may be conducted at individual temperatureslower than 1500F (815.5C) or at a series of lower temperatures todeterrmine the threshold for burning.Any such variations in test procedureshall be reported.10. Report1
30、0.1 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 sample require a higher rating.10.3 If burning occurs, report that the Fl
31、ammability 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 Method D6668 for measuring flammability ratingssince the test result is nonquan
32、titative.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. Users of this standard are expressly advised that determination of the validit
33、y 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 five years andif not revised, either reapproved or withdrawn. Your comment
34、s 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 technical committee, which you may attend. If you feel that your comments have not
35、 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, PA 19428-2959,United States. Individual reprints (single or multiple copi
36、es) 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 ASTM website (www.astm.org/COPYRIGHT/).D6668 01 (2010)3
