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316 Applied Process Design for Chemical and Petrochemical Plants

Table 11-3B (continued)
Refrigerant Data and Safety Classifications

Azeotropic Normal
Refrigerant Temperature Molecular Boiling Point a Safety
o
o
o
Number Composition (Wt%) ( C) ( F) Mass a ( C) ( F) Group
o
Zeotropes
400 R-12/114 (must be specified) none none A1/A1
401A R-22/152a/124 (53/13/34) e A1/A1*
401B R-22/152a/124 (61/11/28) e A1/A1*
401C R-22/152a/124(33/15/52) e A1/A1*
402A R-125/290/22 (60/2/38) f A1/A1*
402B R-125/290/22 (38/2/60) f A1/A1*
403A R-290/22/218 (5/75/20) g A1/A1
403B R-290/22/218 (5/56/39) g A1/A1
404A R-125/143a/134a (44/52/4) f A1/A1*
405A R-22/152a/142b/C318 (45/7/5.5/42.5) h A1/A1
406A R-22/600a/142b (55/4/41) i A1/A2
407A R-32/125/134a (20/40/40) j A1/A1
407B R-32/125/134a (10/70/20) j A1/A1
407C R-32/125/134a (23/25/52) o A1/A1
408A R-125/143a/22 (7/46/47) f A1/A1
409A R-22/124/142b (60/25/15) k A1/A1
409B R-22/124/142b (65/25/10) k A1/A1
410A R-32/125 (50/50) f A1/A1
410B R-32/125 (45/55) n A1/A1
411A R-1270/22/152a (1.5/87.5/11.0) m A1/A2
411B R-1270/22/152a (3/94/3) m A1/A2
412A R-22/218/142b (70/5/25) k A1/A2
Azeotropes b
500 R-12/152a (73.8/26.2) 0 32 99.3 33 27 A1
501 R-22/12 (75.0/25.0) c 41 42 93.1 41 42 A1
502 R-22/115 (48.8/51.2) 19 66 112.0 45 49 A1
503 R-23/13 (40.1/59.9) 88 126 87.5 88 126
504 R-32/115 (48.2/51.8) 17 63 79.2 57 71
505 R-12/31 (78.0/22.0) c 115 239 103.5 30 22
506 R-31/114 (55.1/44.9) 18 64 93.7 12 10
507A p R-125/143a (50/50) 40 40 98.9 46.7 52.1 A1
508A p R-23/116 (39/61) 86 122 100.1 86 122 A1
508B R-23/116 (46/54) 45.6 50.1 95.4 88.3 126.9 A1/A1
509A p R-22/218 (44/56) 0 32 124.0 47 53 A1
a The molecular mass and normal boiling point are not part of this standard.
b Azeotropic refrigerants exhibit some segregation of components at conditions of temperature and pressure other than those at which they were
formulated. The extent of segregation depends on the particular azeotrope and hardware system configuration.
c The exact composition of this azeotrope is in question, and additional experimental studies are needed.
d Held open for future use, formerly used as an indicator of the provisional status of safety classifications.
e Composition tolerances are ( 2/ 0.5, 1.5/ 1).
f Composition tolerances are ( 2/ 1/ 2).
g Composition tolerances are ( 0.2, 2.0/ 2.0/ 2.0).
h Composition tolerances for the individual components are ( 2/ 1/ 1/ 2) and for the sum of R-152a and R-142b are ( 0, 2).
i Composition tolerances are ( 2/ 1/ 1).
j Composition tolerances are ( 1/ 2/ 2).
k Composition tolerances are ( 2/ 2/ 1).
l Composition tolerances are ( 0.5, 1.5/ 1.5, 0.5).
m Composition tolerances are ( 0, 1/ 2, 0/ 0, 1).
n Composition tolerances are ( 1/ 1).
o Composition tolerances are ( 2/ 2/ 2).
p R-507, R-508, and R-509 are allowed alternative designations for R-507A, R-508A, and R-509A due to a change in designations after assignment of
R-500 through R-509. Corresponding changes were not made for R-500 through R-506.
*Indicates removal of provisional status of the classification.
Used by permission: Standard ANSI/ASHRAE 34-1992, including Addenda 34a–o and 34q–x, “Number Designations and Safety Classifications of
Refrigerants,” ©1992 and 1996. American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. All rights reserved.