1、Designation: D6541 11Standard Specification forHFC-236fa, 1,1,1,3,3,3Hexafluoropropane, (CF3CH2CF3)1This standard is issued under the fixed designation D6541; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. 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 specification covers the requirements for HFC-236fa as a fire-fighting medium.1.2 This specification does not address the fir
3、e-fightingequipment or hardware that employs HFC-236fa or the condi-tions of employing such equipment (for example, hand-helds,fixed installations, and so forth).1.3 This specification does not address the storage ortransportation of HFC-236fa. Storage, handling, and transpor-tation issues are addre
4、ssed in Practice D6065.1.4 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.5 The following safety hazards caveat pertains to the testmethods portion, Section 6, of this specification. This standarddoes not purport to address all
5、of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use. A specific warning statement is given in 4.3.2. Referenced Documents
6、2.1 ASTM Standards:2D6065 Practice for Handling, Transportation, and Storageof HFC-227ea 1,1,1,2,3,3,3-Heptafluoropropane(CF3CHFCF3)D6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Admixtures by Gas Chromatography2.2 ISO Standards:3ISO 3427 Gaseous Halogenated Hydrocarbons (Liq
7、uefiedGases)Taking a Sample2.3 AHRI Standard:42008 Appendix C Analytical Procedures for AHRI Stan-dard 700-20062.4 U.S. Government Standards:5Code of Federal Regulations (CFR) Title 49, Part 172.101Tables of Hazardous Materials and Special ProvisionsCode of Federal Regulations (CFR) Title 49, Part 1
8、72Subpart D Marking Requirements of Packaging forTransportation2.5 ASHRAE Standard:6ASHRAE Standard 34 Designation and Safety Classifica-tion of Refrigerants3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 halogenated hydrocarbon (see Note 1)saturated hy-drocarbons in which one
9、 or more of the hydrogen atoms havebeen replaced by atoms of the halogen series (fluorine, chlo-rine, bromine, and iodine). It is convention to prefix thenumber with an abbreviation of the compound:CFC = chlorofluorocarbonHCFC = hydrochlorofluorocarbonHFC = hydrofluorocarbonFC = fluorocarbonR = refr
10、igerantNOTE 1The halogenated compound coding terminology system pro-vides a convenient means to reference halogenated hydrocarbons (seeASRE 34).3.1.1.1 By definition, the right-most digit of the numberingsystem is the number of fluorine atoms.3.1.1.2 The second digit from the right is the number ofh
11、ydrogen atoms plus one (+1).3.1.1.3 The third digit from the right is one less (-1) than thenumber of carbon atoms in the compound (when this numberis zero, it is omitted from the number).3.1.1.4 Unaccounted for valance requirements are assumedto be chlorine atoms.1This specification is under the ju
12、risdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved Aug. 1, 2011. Published September 2011. Originallyapproved in 2000. Last previous edition approve
13、d in 2005 as D654105. DOI:10.1520/D6541-11.2For 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 Am
14、erican National Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.4Available from Air-Conditioning, Heating, and Refrigeration Institute, 2111Wilson Blvd., Suite 500, Arlington, VA 22201.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036
15、.6Available from American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA30329.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1.5 When the compound contains b
16、romine or iodine, thesame rules apply, except the letter B for bromine or I for iodinefollows the parent compound designated number, and thenumber of the atoms is placed after the letter.Example: CF3CH2CF35 R236fa 5 HFC236fa3.1.2 HFC-236fathe compound 1,1,1,3,3,3hexafluoro-propane; CF3CH2CF3.4. Mate
17、rial Requirements4.1 Type IMixtures of HFC-236fa and Nitrogen:4.1.1 The nitrogen (N2) partial pressure shall be such thatthe safe working pressure of the receiving vessel is notexceeded. To prevent excessive pressure, the fill density of theHFC-236fa/nitrogen within the container should not exceedth
18、at needed to achieve complete filling of the container at themaximum expected storage temperature. For example, the U.S.DOT 4BA500 cylinder partial pressure shall not exceed 24.4bar at 21C (340 psig at 70F) for a 1153kg/m3(72 lb/ft3) filldensity. For this example, the safe working pressure of the4BA
19、500 cylinder is not exceeded for temperatures below 54C(130F).4.1.2 HFC-236fa shall conform to the requirements pre-scribed in Table 1 when tested by the appropriate test meth-od(s) listed in 6.4.1.3 When material analysis is required, by agreementbetween the purchaser and the supplier, the total pr
20、essure in theHFC-236fa container, partial pressure of the nitrogen, the filldensity of the HFC-236fa within the container, and the maxi-mum safe storage temperature shall be part of the materialanalysis (certification). The pressure shall be reported in bar(preferred) or pound-force per square inch
21、gage (psig). The filldensity shall be reported in kilograms per cubic metre at 21C(preferred) or pounds per cubic foot at 70F. The maximumsafe storage temperature of the HFC-236fa shall be reported indegrees Celsius (preferred) or in degrees Fahrenheit and shallconform to the applicable regulations
22、for the HFC-236facontainer design and use.4.2 Type IIHFC-236fa shall conform to the requirementsof Type I, as listed in 4.1.1, and shall contain no more than 1.5% by volume fixed gases in the vapor phase, expressed as airwhen tested by the appropriate test method(s) listed in Section6.4.3 By agreeme
23、nt between the purchaser and the supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.(WarningExposure toconcentrations of HFC-236fa in excess of 15 % by volume inair during periods of elevated adrenaline could produce cardiacarrhythmia in some p
24、ersonnel.)4.4 Unless otherwise specified, Type I is assumed.5. Sampling5.1 Samples of HFC-236fa taken from the liquid phase,shall be taken from filled containers in accordance with themethod specified in ISO 3427. The sampling bottle shall becapable of safely resisting the vapor pressure of the samp
25、le atthe highest temperature that could be encountered.5.2 The HFC-236fa selected in accordance with 5.1 shall betested for quality conformance in accordance with Section 6.The presence of one or more defects shall be cause forrejection.6. Test Methods6.1 PurityDetermine purity using the method spec
26、ified inPractice D6806.6.2 AcidityDetermine acidity using the method specifiedin 2008 Appendix C to AHRI Standard 700-200, part 1.6.3 Water ContentDetermine water content using themethod specified in 2008 Appendix C to AHRI Standard700-2006, part 2.6.4 Nonvolatile Residue Determine nonvolatile resid
27、ueusing the method specified in 2008 Appendix C to AHRIStandard 700-2006, part 3.6.5 Non-condensable GasesDetermine non-condensablegases using the method specified in 2008 Appendix C to AHRIStandard 700-2006, part 5.6.6 Suspended Matter or SedimentWhile performing thenonvolatile residue analysis, ex
28、amine visually for any sus-pended matter or sediment. Observation of any suspendedmatter or sediment shall constitute failure by this test method.7. Container, Packaging, and Package Marking7.1 Containers used for shipping and storage of HFC-236faconforming to this specification shall be marked in t
29、he accor-dance with Code of Federal Regulations (CFR) Title 49, Part172 Subpart D. The proper shipping name for pure1,1,1,3,3,3hexafluoropropane is “Liquefied Gas, n.o.s.”UN3163 (49 CFR 172.101). The proper shipping name fornitrogen super-pressurized 1,1,1,3,3,3hexafluoropropane is“Liquefied Gas, no
30、nflammable charged with nitrogen,”UN1058 (49 CFR 172.101). In addition to DOT requirements,containers shall be marked with the following information as aminimum:7.1.1 Suppliers name and address,7.1.2 HFC-236fa (1,1,1,3,3,3hexafluoropropane), and7.1.3 Statement that material conforms to Specification
31、D6541.8. Keywords8.1 CF3CH2CF3; FE-36TM; fire fighting; fire fighting agent;fire protection; fire suppressant;1,1,1,3,3,3hexafluoropropane;HFC-236fa; hydrofluorocarbon; hydrofluorocarbon 236faTABLE 1 RequirementsProperty RequirementHFC-236fa purity, %, mol/mol, min 99 (exclusive of any N2present)Aci
32、dity, ppm by mass, as HCl, max 1.0Water content, ppm by mass, max 10Nonvolatile residue, % by weight, max 0.03Suspended matter or sediment none visibleD6541 112ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stan
33、dard. Users 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 revie
34、wed every 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 theresponsibl
35、e technical 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 Con
36、shohocken, 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 ASTM website (www.astm.org/COPYRIGHT/).D6541 113
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