1、Designation: D6541 11 (Reapproved 2015)Standard 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 ye
2、ar 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 specification covers the requirements for HFC-236fa as a fire-fighting medium.1.2 This specification does n
3、ot address the fire-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-tatio
4、n issues are addressed 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 purpo
5、rt to address all 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. Ref
6、erenced Documents2.1 ASTM Standards:2D6065 Practice for Handling, Transportation, and Storage ofHFC-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
7、Hydrocarbons (LiquefiedGases)Taking a Sample2.3 AHRI Standard:42008Appendix C Analytical Procedures forAHRI Standard700-20062.4 U.S. Government Standards:5Code of Federal Regulations (CFR) Title 49, Part172.101 Tables of Hazardous Materials and Special Pro-visionsCode of Federal Regulations (CFR) Ti
8、tle 49, Part 172Subpart D Marking Requirements of Packaging for Trans-portation2.5 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-drocarb
9、ons in which one or more of the hydrogen atoms havebeen replaced by atoms of the halogen series (fluorine,chlorine, bromine, and iodine). It is convention to prefix thenumber with an abbreviation of the compound:CFC = chlorofluorocarbonHCFC = hydrochlorofluorocarbonHFC = hydrofluorocarbonFC = fluoro
10、carbonR = refrigerantNOTE 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
11、the number ofhydrogen 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).1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents
12、 and Fire Extinguishing Agents and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved June 1, 2015. Published June 2015. Originallyapproved in 2000. Last previous edition approved in 2011 as D654111. DOI:10.1520/D6541-11R15.2For referenced ASTM s
13、tandards, 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 American National Standards Institute (ANSI), 25 W. 43rd St.,4th Fl
14、oor, New York, NY 10036, http:/www.ansi.org.4Available from Air-Conditioning, Heating, CF3CH2CF3.4. Material 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 preven
15、t excessive pressure, the fill density of theHFC-236fa/nitrogen within the container should not exceedthat 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 ps
16、ig at 70F) for a 1153kg/m3(72 lb/ft3) filldensity. For this example, the safe working pressure of the4BA500 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.
17、1.3 When material analysis is required, by agreementbetween the purchaser and the supplier, the total pressure 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 materialan
18、alysis (certification). The pressure shall be reported in bar(preferred) or pound-force per square inch 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 reporte
19、d indegrees Celsius (preferred) or in degrees Fahrenheit and shallconform to the applicable regulations 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 vapo
20、r phase, expressed as airwhen tested by the appropriate test method(s) listed in Section6.4.3 By agreement 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
21、 of 15 % by volume inair during periods of elevated adrenaline could produce cardiacarrhythmia in some personnel.)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 speci
22、fied in ISO 3427. The sampling bottle shall becapable of safely resisting the vapor pressure of the sample 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
23、more defects shall be cause forrejection.6. Test Methods6.1 PurityDetermine purity using the method specified 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
24、 in 2008 Appendix C to AHRI Standard700-2006, part 2.6.4 Nonvolatile ResidueDetermine nonvolatile residue us-ing 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 AHRIStand
25、ard 700-2006, part 5.6.6 Suspended Matter or SedimentWhile performing thenonvolatile residue analysis, examine 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 C
26、ontainers used for shipping and storage of HFC-236faconforming to this specification shall be marked in the accor-dance with Code of Federal Regulations (CFR) Title 49, Part172 Subpart D. The proper shipping name for pure 1,1,1,3,3,3hexafluoropropane is “Liquefied Gas, n.o.s.” UN3163 (49CFR 172.101)
27、. The proper shipping name for nitrogen super-pressurized 1,1,1,3,3,3hexafluoropropane is “Liquefied Gas,nonflammable charged with nitrogen,” UN1058 (49 CFR172.101). In addition to DOT requirements, containers shall bemarked with the following information as a minimum:7.1.1 Suppliers name and addres
28、s,7.1.2 HFC-236fa (1,1,1,3,3,3hexafluoropropane), and7.1.3 Statement that material conforms to SpecificationD6541.8. Keywords8.1 CF3CH2CF3; FE-36TM; fire fighting; fire fighting agent;fire protection; fire suppressant; 1,1,1,3,3,3hexafluoropropane; HFC-236fa; hydrofluorocarbon; hydro-fluorocarbon 23
29、6faTABLE 1 RequirementsProperty RequirementHFC-236fa purity, %, mol/mol, min 99 (exclusive of any N2present)Acidity, ppm by mass, as HCl, max 1.0Water content, ppm by mass, max 10Nonvolatile residue, % by weight,max0.03Suspended matter or sediment none visibleD6541 11 (2015)2ASTM International takes
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