1、Designation: D 7122 05Standard Specification forHCFC Blend B (CF3CCl2H, Ar, and CF4)1This standard is issued under the fixed designation D 7122; 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
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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-fightingequip
3、ment 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 D 7
4、123.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are for informa-tion only.2. Referenced Documents2.1 ASTM Standards:2D 7123 Practice for Handling, Transportation, and Storageof HCFC Blend BD 2109 Test Methods for Nonvolatile Matter in Halo
5、ge-nated Organic Solvents and Their AdmixturesD 3401 Test Methods for Water in Halogenated OrganicSolvents and Their AdmixturesD 3444 Test Methods for Total Acid Number of Trichlorot-rifluoroethaneD 6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Admixtures by Gas Chromotograph
6、y2.2 ISO Standards:3ISO 3363 Fluorochlorinated Hydrocarbons for IndustrialUse-Determination of Acidity-Titrimetric MethodISO 3427 Gaseous Halogenated Hydrocarbons (LiquefiedGases)Taking of a SampleISO 5789 Fluorinated Hydrocarbons for Industrial Use-Determination of Nonvolatile Residue2.3 ASHRAE Sta
7、ndard:4ASHRAE 34 Designation and Safety Classification of Re-frigerants2.4 U.S. Government Standards:5CFR Title 49, Part 172, Subpart D, U.S. Department ofTransportation (DOT), Marking Requirements of Packag-ing for Transportation3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1
8、 HCFChydrochlorofluorocarbon; a chemical com-pound in which the compound molecule is comprised exclu-sively of 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
9、 suppress a fire or explosionhazard. The blend also contains argon and tetrafluoromethane.3.1.2.1 DiscussionThe 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 definiti
10、on, the first digit of thenumbering system represents one less than the number ofcarbon atoms in the compound 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 vale
11、nce require-ments are assumed to be chlorine atoms. For example, thedesignation HCFC-123 indicates two carbon atoms (1 + 1), onehydrogen atom (2-1), three fluorine atoms (3), and two chlorineatoms (2 atoms required based on valence requirements).Example: CF3CCl2H = HCFC-1234. Material Requirements4.
12、1 The fill density of HCFC Blend B within a containershould not exceed that needed to achieve complete filling of thecontainer at the maximum envisaged storage temperature. Forexample, the fill density should not exceed 86 lb/ft3(13771This specification is under the jurisdiction of ASTM Committee D2
13、6 onHalogenated Organic Solvents and is the direct responsibility of SubcommitteeD26.09 on Fire Extinguishing Agents.Current edition approved June 1, 2005. Published June 2005.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. Fo
14、r 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 American Society of Heating, Refrigerating, and Air-Conditioning Eng
15、ineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA303295Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.kg/m3) for a maximum exp
16、ected 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 requirementsprescribed in Table 1 when tested by appropriate test methods,such as those listed in Section 2.2.4.3 When a material analysis is required, by agreementbetween
17、 the purchaser and the supplier, the total pressure in theHCFC Blend B container, the fill density of HCFC Blend Bwithin the container and the maximum safe storage tempera-ture shall be part of the material analysis (certification). Thepressure shall be reported in pound-force per square inch gage(p
18、referred) or bar. The fill density shall be reported in poundsper cubic foot at 70F (preferred) or kilograms per cubic meterat 21C. The maximum safe storage temperature of the HCFCBlend B container shall be reported in degrees Fahrenheit(preferred) or in degrees Celsius and shall conform to appli-ca
19、ble regulations for the HCFC Blend B container design anduse.4.4 By agreement between the purchaser and the supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.NOTE 1Prolonged exposure to concentrations of HCFC Blend B inexcess of 2 % by volume
20、in air during periods of elevated adrenaline couldproduce cardiac arrhythmia in some personnel.5. Sampling5.1 Samples of HCFC Blend B, taken from the liquid phase,shall be taken from filled containers in accordance with themethod specified in ISO 3427. The sampling cylinder shall becapable of safely
21、 resisting the vapor pressure of the sample atthe highest temperature that could be encountered.5.2 The HCFC Blend B selected in accordance with 5.1shall be tested for quality conformance in accordance withTable 1. The presence of one or more defects shall be cause forrejection.6. Test Methods6.1 An
22、alysis will be conducted in accordance with PracticeD 6806.6.2 Acidity analysis will be conducted in accordance withTest Methods D 3444.6.3 Water content analysis will be conducted in accordancewith Test Methods D 3401.6.4 Nonvolatile residue analysis will be conducted in accor-dance with Test Metho
23、ds D 2109.6.5 When liquid dispensed into a glass tube and shaken, nosediment or visible matter shall be visible.7. Container, Packaging, and Package Marking7.1 Containers used for shipping and storage of HCFCBlend B conforming to this specification shall be marked inaccordance with Code of Federal R
24、egulations (CFR) Title 49,Part 172, Subpart D. The proper shipping name is “Com-pressed Gases. N.O.S., (contains tetrafluoromethane, argon),2.2, UN1956.” In addition to DOT requirements, containersshould be marked with the following information as a mini-mum:7.1.1 Suppliers name and address,7.1.2 HC
25、FC Blend B, and7.1.3 Statement that material conforms to SpecificationD 7122.8. Keywords8.1 HCFC Blend B; CF3CCl2H; HCFC-123;2,2-dichloro-1,1,1-trifluoroethane; argon; tetrafluoromethane; fire suppres-sant; fire extinguishant; Halotront IASTM International takes no position respecting the validity o
26、f any patent 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
27、 revision 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.
28、Your comments 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 c
29、opyrighted 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
30、.org (e-mail); or through the ASTM website(www.astm.org).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/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 visibleD7122052
