1、Designation: D6126/D6126M 111Standard Specification forHFC-23 (Trifluoromethane, CHF3)1This standard is issued under the fixed designation D6126/D6126M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEDesignation was corrected editorially in October 2013.1. Scope1.1 This specification covers the requirements for HFC-23as a fire fighting mediu
3、m.1.2 This specification does not address the fire fightingequipment or hardware that employs HFC-23 or the conditionsof employing such equipment (for example: handshields, fixedinstallations, etc.).1.3 This specification does not address the storage ortransportation of HFC-23 Storage handling, and
4、transportationissues are addressed in Practice D6127.1.4 The values stated in both inch-pound and SI units are tobe regarded separately as the standard. The values given inparentheses are for information only.1.5 The following safety hazards caveat pertains to the testmethods portion, Section 6, of
5、this specification:This standarddoes not purport 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.2. Re
6、ferenced Documents2.1 ASTM Standards:2D6127 Practice for Handling, Transportation, and Storage ofHFC-23 (Trifluoromethane, CHF3)D6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Admixtures by Gas Chromatography2.2 ISO Standards:ISO 3427 Gaseous Halogenated Hydrocarbons (Liquefie
7、dGases) - Taking a Sample32.3 ARI Standards:Available from the Air Conditioning,Heating and Refrigeration Institute, 4100 North Fairfax Drive,Suite 200, Arlington, VA, 22203-1678.2008 Appendix C Analytical Procedures for ARI Standard700-20062.4 U.S. Government Standards:Code of Federal Regulations (
8、CFR) Title 49, Part 172.101Tables of Hazardous Materials and Special Provisions5Code of Federal Regulations (CFR) Title 49, Part 172 SubD Marking Requirements of Packaging for Transporta-tion52.5 American Society of Refrigeration Engineers:ASRE Standard 34, Designation of Refrigerants63. Terminology
9、3.1 Definitions of Terms Specific to This Standard:3.1.1 halogenated hydrocarbonthe halogenated com-pound coding terminology system provides a convenientmeans to reference halogenated hydrocarbons, ASRE 34.Halogenated hydrocarbons are saturated hydrocarbons inwhich one or more of the hydrogen atoms
10、have been replacedby atoms of the halogen series (fluorine, chlorine, bromine, andiodine). It is convention to prefix the number with an abbre-viation of the compound:CFC = chlorofluorocarbonHCFC = hydrochlorofluorocarbonHFC = hydrofluorocarbonFC = fluorocarbonR = refrigerant3.1.1.1 DiscussionBy def
11、initions, the right most digit ofthe numbering system is the number of fluorine atoms.1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agentsand is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Cu
12、rrent edition approved Jan. 1, 2011. Published August 2011. Originallyapproved in 1997. Last previous edition approved in 2003 as D6126 - 97(2003)1.DOI: 10.1520/D6126-11E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For A
13、nnual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington
14、, DC 20036.6Available from American Society of Refrigeration Engineers, RefrigerationEngineering 65. 49 (1957).Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.1.2 DiscussionThe second digit from the right is thenumber of hydrogen
15、atoms plus one (+1).3.1.1.3 DiscussionThe third digit from the right is one less(-1) than number of carbon atoms in the compound (when thisnumber is zero (0) it is omitted from the number.3.1.1.4 DiscussionUnaccounted for valance requirementsare assumed to be chlorine atoms.3.1.1.5 DiscussionWhen th
16、e compound contains bromineor iodine, the same rules apply except the letter “B” forbromine or “I” for iodine follows the parent compounddesignated number and the number of the atoms is placed afterthe letter.3.1.1.6 DiscussionExampleCHF3= R-23 = HFC-23.3.1.2 HFC-23the compound trifluoromethane; CHF
17、3.4. Material Requirements4.1 Nitrogen (N2) partial pressure is not required for thisproduct, it is shipped neat. The saturated vapor pressure ofHFC-23 is 42 bars at 21C (610 psig at 70F). HFC-23 has acritical temperature of 25.9C (78.6F). The filling densityshould be that which will not liquid fill
18、 the container attemperatures below 25.9C (78.6F) or exceed 5/4 the pressurerating of the container at 130 F. For example, the U.S. DOT3AL cylinder with a minimum working pressure of 1800 psigshall not exceed 42 bar at 21C (610 psig at 70F) for amaximum filling density of 84.4 %. For this example th
19、ecylinder pressure is 141 bars at 54C (2045 psig at 130F).4.1.1 HFC-23 shall conform to the requirements prescribedin Table 1 when tested by the appropriate test method(s) listedin Section 6.4.1.2 When material analysis is required, by agreementbetween the purchaser and the supplier, the total press
20、ure in theHFC-23 container, the fill density of the HFC-23 within thecontainer, and the maximum safe storage temperature shall bepart of the material analysis (certification). The pressure shallbe reported in bar (preferred) or pound-force per square inchgage (psig). The fill density shall be report
21、ed in kilograms percubic metre at 21C (preferred) or pounds per cubic foot at70F. The maximum safe storage temperature of the HFC-23shall be reported in degrees Celsius (preferred) or in degreesFahrenheit and shall conform to the applicable regulations forthe HFC-23 container design and use.4.2 By a
22、greement between the purchaser and the supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.4.3 Product RequirementsSee Table 1.5. Sampling5.1 Samples of HFC-23, taken from the liquid phase, shallbe taken from filled containers in accordance with
23、 the methodspecified in ISO 3427. The sampling bottle shall be capable ofsafely resisting the vapor pressure of the sample at the highesttemperature that could be encountered.5.2 The HFC-23 selected in accordance with 5.1 shall betested for quality conformance in accordance with Section 6.The presen
24、ce of one or more defects shall be cause forrejection.6. Test Methods6.1 PurityDetemine purity using the method specified inPractice D6806.6.2 AcidityDetermine acidity using the method specifiedin 2008 Appendix C to ARI Standard 700-2006, part 1.6.3 Water ContentDetermine water content using themeth
25、od specified in 2008 Appendix C to ARI Standard700-2006, part 2.6.4 Nonvolatile ResidueDetermine nonvolatile residue us-ing the method specified in 2008 Appendix C to ARI Standard700-2006, part 3.6.5 Non-absorbable GasesDetermine non-absorbablegases using the method specified in 2008 Appendix C to A
26、RIStandard 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 of this test method.7. Container, Packaging, and Package Marki
27、ng7.1 Containers used for shipping and storage of HFC-23conforming to this specification shall be marked in the accor-dance with Code of Federal Regulations (CFR) Title 49, Part172 Sub D. The proper shipping name is UN1984,trifluoromethane, “nonflammmable gas“ (49 CFR 172.101). Inaddition to DOT req
28、uirements, containers shall be marked withthe following information as a minimum:7.1.1 Suppliers name and address,7.1.2 HFC-23 (trifluoromethane), and7.1.3 Statement that material conforms to ASTM Specifica-tion D6126.8. Keywords8.1 CHF3; FE-13; fire fighting; fire fighting agent; fireprotection; fi
29、re suppressant; HFC-23; hydrofluorocarbon; trif-luoromethaneTABLE 1 RequirementsProperty RequirementHFC-23 purity, %, mol/mol, max 99.0Acidity, ppm by mass, as HCI, max 3.0Water content, ppm by mass, max 10Nonvolatile residue, % by weight, max 0.08Suspended matter or sediment none visibleD6126/D6126
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33、ommittee 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 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/).D6126/D6126M 1113
