1、Designation: D6126 11Standard Specification forHFC-23 (Trifluoromethane, CHF3)1This standard is issued under the fixed designation D6126; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parent
2、heses 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-23as a fire fighting medium.1.2 This specification does not address the fire fightingequipment or ha
3、rdware 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 transportationissues are addressed in Practice D6127.1.4 The values stated
4、 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 this specification: This standarddoes not purport to address all of the sa
5、fety 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. Referenced Documents2.1 ASTM Standards:2D6127 Practice for Handling, Transp
6、ortation, and Storageof HFC-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 (LiquefiedGases) - Taking a Sample32.3 ARI Standards:42008 Appendix C Analytical P
7、rocedures for ARI Standard700-20062.4 U.S. Government Standards:Code of Federal Regulations (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 So
8、ciety of Refrigeration Engineers:ASRE Standard 34, Designation of Refrigerants63. Terminology3.1 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.H
9、alogenated hydrocarbons are saturated hydrocarbons inwhich one or more of the hydrogen atoms 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 = hydrochlo
10、rofluorocarbonHFC = hydrofluorocarbonFC = fluorocarbonR = refrigerant3.1.1.1 DiscussionBy definitions, the right most digit ofthe numbering system is the number of fluorine atoms.3.1.1.2 DiscussionThe second digit from the right is thenumber of hydrogen atoms plus one (+1).3.1.1.3 DiscussionThe thir
11、d digit from the right is oneless (-1) than number of carbon atoms in the compound (whenthis number is zero (0) it is omitted from the number.1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the directresponsibili
12、ty of Subcommittee D26.09 on Fire Extinguishing Agents.Current 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/D6126-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orc
13、ontact 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, 11 W. 42nd St., 13thFloor, New York, NY 10036.4Available from the Air Condition
14、ing, Heating and Refrigeration Institute, 4100North Fairfax Drive, Suite 200, Arlington, VA, 22203-1678.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.6Available from American Society of Refrigeration Engineers, RefrigerationEngineering 65. 49 (1957
15、).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1.4 DiscussionUnaccounted for valance requirementsare assumed to be chlorine atoms.3.1.1.5 DiscussionWhen the compound contains bromineor iodine, the same rules apply except the l
16、etter “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; CHF3.4. Material Requirements4.1 Nitrogen (N2) partial pressure is not req
17、uired 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 the container attemperatures below 25.9C (78.6F) or exceed 5/4 the pre
18、ssurerating 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 thecylinder pressure is 141 bars at 54C (2045 psig at 130F).4.1.1 HFC-23
19、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 pressure in theHFC-23 container, the fill density of the HFC-23 within theco
20、ntainer, 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 reported in kilograms percubic metre at 21C (preferred) or pounds per cubic f
21、oot 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 agreement between the purchaser and the supplier,analysis may be require
22、d 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 the methodspecified in ISO 3427. The sampling bottle shall be capable
23、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 presence of one or more defects shall be cause forrejection.6. Test Methods6.
24、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 themethod specified in 2008 Appendix C to ARI Standard700-2006, part 2.6.4 Non
25、volatile ResidueDetermine nonvolatile residueusing the method specified in 2008 Appendix C to ARIStandard 700-2006, part 3.6.5 Non-absorbable GasesDetermine non-absorbablegases using the method specified in 2008 Appendix C to ARIStandard 700-2006, part 5.6.6 Suspended Matter or SedimentWhile perform
26、ing 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 Marking7.1 Containers used for shipping and storage of HFC-23conforming to thi
27、s 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, trifluo-romethane, 9nonflammmable gas9 (49 CFR 172.101). In addi-tion to DOT requirements, containers shall be marked with thefollowing information a
28、s 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-13y; fire fighting; fire fighting agent; fireprotection; fire suppressant; HFC-23; hydrofluorocarbon;trifluoromethaneTABLE 1 Re
29、quirementsProperty 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 112ASTM International takes no position respecting the validity of any pate
30、nt rights asserted in connection with any item mentionedin this standard. 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
31、at any time by the responsible technical committee and must be reviewed 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 comme
32、nts will receive careful consideration at a meeting of theresponsible 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
33、 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 113
