ASTM D7122-05

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Designation: D7122 – 05
Standard Specification for
HCFC Blend B (CF CCl H, Ar, and CF )
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This standard is issued under the fixed designation D7122; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 ASHRAE Standard:
ASHRAE 34 Designation and Safety Classification of Re-
1.1 This specification covers requirements for HCFC Blend
frigerants
B as a fire-fighting medium.
2.4 U.S. Government Standards:
1.2 This specification does not address the fire-fighting
CFR Title 49, Part 172, Subpart D, U.S. Department of
equipment or hardware that employs HCFC Blend B or the
Transportation (DOT), Marking Requirements of Packag-
conditions of employing such equipment (for example, hand-
ing for Transportation
helds, fixed installations, etc.).
1.3 This specification does not address the storage or
3. Terminology
transportation of HCFC Blend B. Storage, handling, and
3.1 Definitions of Terms Specific to This Standard:
transportation issues are addressed in Practice D7123.
3.1.1 HCFC—hydrochlorofluorocarbon; a chemical com-
1.4 The values stated in inch-pound units are to be regarded
pound in which the compound molecule is comprised exclu-
as standard. The values given in parentheses are for informa-
sively of hydrogen, chlorine, fluorine and carbon atoms.
tion only.
3.1.2 HCFC Blend B—tertiary blend comprised primarily
2. Referenced Documents of HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane); a com-
pound used to inert, extinguish, or suppress a fire or explosion
2.1 ASTM Standards:
hazard. The blend also contains argon and tetrafluoromethane.
D7123 Practice for Handling, Transportation, and Storage
3.1.2.1 Discussion—The terminology system for fluorine-
of HCFC Blend B (CF CCl H, Ar, and CF )
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containing compounds (described in detail in ASHRAE Stan-
D2109 Test Methods for Nonvolatile Matter in Halogenated
dard34)providesaconvenientmeanstoreferencethestructure
Organic Solvents and Their Admixtures
of individual compounds. By definition, the first digit of the
D3401 Test Methods for Water in Halogenated Organic
numbering system represents one less than the number of
Solvents and Their Admixtures
carbon atoms in the compound molecule; the second digit, one
D3444 Test Method for Total Acid Number of Trichlorotri-
more than the number of hydrogen atoms in the compound
fluoroethane
molecule; and the third digit, the number of fluorine atoms in
D6806 Practice for Analysis of Halogenated Organic Sol-
the compound molecule. Unaccounted for valence require-
vents and Their Admixtures by Gas Chromatography
ments are assumed to be chlorine atoms. For example, the
2.2 ISO Standards:
designationHCFC-123indicatestwocarbonatoms(1+1),one
ISO 3363 Fluorochlorinated Hydrocarbons for Industrial
hydrogenatom(2-1),threefluorineatoms(3),andtwochlorine
Use-Determination of Acidity-Titrimetric Method
atoms (2 atoms required based on valence requirements).
ISO 3427 Gaseous Halogenated Hydrocarbons (Liquefied
Example: CF CCl H = HCFC-123
3 2
Gases)–Taking of a Sample
ISO 5789 Fluorinated Hydrocarbons for Industrial Use-
4. Material Requirements
Determination of Nonvolatile Residue
4.1 The fill density of HCFC Blend B within a container
shouldnotexceedthatneededtoachievecompletefillingofthe
This specification is under the jurisdiction of ASTM Committee D26 on
container at the maximum envisaged storage temperature. For
Halogenated Organic Solvents and is the direct responsibility of Subcommittee 3
example, the fill density should not exceed 86 lb/ft (1377
D26.09 on Fire Extinguishing Agents.
Current edition approved June 1, 2005. Published June 2005. DOI: 10.1520/
D7122-05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Society of Heating, Refrigerating, and Air-
Standards volume information, refer to the standard’s Document Summary page on Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA
the ASTM website. 30329.
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