1、Designation: D7122 11Standard Specification forHCFC Blend B (CF3CCl2H, Ar, and CF4)1This standard is issued under the fixed designation D7122; 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 p
2、arentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers requirements for HCFC BlendB as a fire-fighting medium.1.2 This specification does not address the fire-fightingequipmen
3、t or hardware that employs HCFC Blend B or theconditions of employing such equipment (for example, hand-helds, fixed installations, etc.).1.3 This specification does not address the storage ortransportation of HCFC Blend B. Storage, handling, andtransportation issues are addressed in Practice D7123.
4、1.4 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 information onlyand are not considered standard.1.5 The following safety hazards caveat pertains only to thetest methods portion, Sec
5、tion 6, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prio
6、r to use. Specific hazards statements are given inSection 4.5.2. Referenced Documents2.1 ASTM Standards:2D6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Admixtures by Gas ChromatographyD7123 Practice for Handling, Transportation, and Storageof HCFC Blend B (CF3CCl2H, Ar, and C
7、F4)2.2 ISO Standard:3ISO 3427 Gaseous Halogenated Hydrocarbons (LiquefiedGases)Taking of a Sample2.3 ASHRAE Standard:4ASHRAE 34 Designation and Safety Classification of Re-frigerants2.4 U.S. Government Standard:5CFR Title 49, Part 172, Subpart D, U.S. Department ofTransportation (DOT), Marking Requi
8、rements of Packag-ing for Transportation2.5 AHRI Standard:62008Appendix C Analytical Procedures forAHRI Standard700-20063. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 HCFChydrochlorofluorocarbon; a chemical com-pound in which the compound molecule is comprised exclu-sively of
9、 hydrogen, chlorine, fluorine and carbon atoms.3.1.2 HCFC Blend Btertiary blend comprised primarilyof HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane); a com-pound used to inert, extinguish, or suppress a fire or explosionhazard. The blend also contains argon and tetrafluoromethane.3.1.2.1 DiscussionTh
10、e terminology system for fluorine-containing compounds (described in detail in ASHRAE Stan-dard 34) provides a convenient means to reference the structureof individual compounds. By definition, the first digit of thenumbering system represents one less than the number ofcarbon atoms in the compound
11、molecule; the second digit, onemore than the number of hydrogen atoms in the compoundmolecule; and the third digit, the number of fluorine atoms inthe compound molecule. Unaccounted for valence require-ments are assumed to be chlorine atoms. For example, thedesignation HCFC-123 indicates two carbon
12、atoms (1 + 1), onehydrogen atom (2-1), three fluorine atoms (3), and two chlorine1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Curren
13、t edition approved Aug. 1, 2011. Published September 2011. Originallyapproved in 2005. Last previous edition approved in 2005 as D 7122-05. DOI:10.1520/D7122-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book o
14、f 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 American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (A
15、SHRAE), 1791 Tullie Circle, NE, Atlanta, GA30329.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.6Available from Air-Conditioning, Heating, and Refrigeration Institute, 2111Wilson Blvd., Suite 500, Arlington, VA 22201.1Copyright ASTM International, 1
16、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.atoms (2 atoms required based on valence requirements).Example: CF3CCl2H = HCFC-1234. Material Requirements4.1 The fill density of HCFC Blend B within a containershould not exceed that needed to achieve complete filli
17、ng of thecontainer at the maximum envisaged storage temperature. Forexample, the fill density should not exceed 86 lb/ft3(1377kg/m3) for a maximum expected temperature of 130F (54 C).Recommended fill density is 76 lb/ft3(1219 kg/m3) or less.4.2 HCFC Blend B shall conform to the requirementsprescribe
18、d in Table 1 when tested by the appropriate testmethods, such as those listed in Section 6.4.3 When a material analysis is required, by agreementbetween the purchaser and the supplier, the total pressure in theHCFC Blend B container, the fill density of HCFC Blend Bwithin the container and the maxim
19、um safe storage tempera-ture shall be part of the material analysis (certification). Thepressure shall be reported in pound-force per square inch gage(preferred) or bar. The fill density shall be reported in poundsper cubic foot at 70F (preferred) or kilograms per cubic meterat 21C. The maximum safe
20、 storage temperature of the HCFCBlend B container shall be reported in degrees Fahrenheit(preferred) or in degrees Celsius and shall conform to appli-cable regulations for the HCFC Blend B container design anduse.4.4 By agreement between the purchaser and the supplier,analysis may be required and li
21、mits established for elements orcompounds not specified in Table 1.4.5 Prolonged exposure to concentrations of HCFC Blend Bin excess of 2 % by volume in air during periods of elevatedadrenaline could produce cardiac arrhythmia in some person-nel.5. Sampling5.1 Samples of HCFC Blend B, taken from the
22、 liquid phase,shall be taken from filled containers in accordance with themethod specified in ISO 3427. The sampling cylinder shall becapable of safely resisting the vapor pressure of the sample atthe highest temperature that could be encountered.5.2 The HCFC Blend B selected in accordance with 5.1s
23、hall be tested for quality conformance in accordance withTable 1. The presence of one or more defects shall be cause forrejection.6. Test Methods6.1 PurityConduct the analysis in accordance with Prac-tice D6806.6.2 AcidityConduct the analysis in accordance with themethod specified in 2008 Appendix C
24、 to AHRI Standard700-2006, Part 1.6.3 Water ContentConduct the analysis in accordancewith the method specified in 2008 Appendix C to AHRIStandard 700-2006, Part 2.6.4 Nonvolatile ResidueConduct the analysis in accor-dance with the method specified in 2008 Appendix C to AHRIStandard 700-2006, Part 3.
25、6.5 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 the test.7. Container, Packaging, and Package Marking7.1 Containers used for shipping a
26、nd storage of HCFCBlend B conforming to this specification shall be marked inaccordance with Code of Federal Regulations (CFR) Title 49,Part 172, Subpart D. The proper shipping name is “Com-pressed Gases. N.O.S., 2.2, UN1956.” In addition to DOTrequirements, containers should be marked with the foll
27、owinginformation as a minimum:7.1.1 Suppliers name and address,7.1.2 HCFC Blend B, and7.1.3 Statement that material conforms to SpecificationD7122.8. Keywords8.1 HCFC Blend B; CF3CCl2H; HCFC-123;2,2-dichloro-1,1,1-trifluoroethane; argon; tetrafluoromethane; fire suppres-sant; fire extinguishant; Hal
28、otront I77Halotront is a trademark of American Pacific Corporation.TABLE 1 RequirementsProperty RequirementHCFC-123 Purity 99 %, mol/mol, min (exclusive of any argon ortetrafluoromethane present)HCFC-123 Content 95 %, mol/mol, minArgon Content 0.2 %, mol/mol, minTetrafluoromethane Content 0.4 %, mol
29、/mol, minAcidity 1.0 ppm by mass, as HCL, maxWater content 20 ppm by mass, maxNonvolatile residue 0.01 % by weight, maxSuspended matter or sediment none visibleD7122 112ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin
30、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 at any time by the responsible technical committee and must
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32、esponsible 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,
33、 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/).D7122 113
