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AG 31-011 • REFRIGERANT PIPING DESIGN 50 www.DaikinApplied.com
Table 19: R-22 Refrigerant Charge
(Lbs . per 100 Feet of Pipe)
Line Size OD Flow Area
Suction Line Liquid Line
Discharge
Line
40°F 105°F 140°F
inches in 2 1 .52 lb ./ft 3 68 .72 lb ./ft 3 6 .97 lb ./ft 3
1/2 0.145 0.15 6.92 0.70
5/8 0.233 0.25 11.12 1.13
7/8 0.484 0.51 23.10 2.34
1-1/8 0.825 0.87 39.37 3.99
1-3/8 1.257 1.33 59.99 6.08
1-5/8 1.779 1.88 84.90 8.61
2-1/8 3.905 4.13 186.36 18.90
2-5/8 4.772 5.04 227.73 23.09
3-1/8 6.812 7.20 325.08 32.97
3-5/8 9.213 9.74 439.66 44.58
4-1/8 11.977 12.66 571.57 57.96
5-1/8 18.665 19.72 890.74 90.33
6-1/8 26.832 28.35 1280.48 129.85
8-1/8 46.869 49.53 2236.69 226.81
Refrigerant weight per 100 feet of pipe is based on 105°F condensing
temperature and 10°F sub-cooling, 140°F discharge temperature, and 40°F
saturated suction temperature.
Table 20: R-134a Refrigerant Charge
(Lbs . per 100 feet of Pipe)
Line Size OD Flow Area
Suction Line Liquid Line
Discharge
Line
40°F 105°F 140°F
inches in
2
1 .05 lb ./ft
3
69 .93 lb ./ft
3
5 .46 lb ./ft
3
1/2 0.145 0.11 7.04 0.55
5/8 0.233 0.17 11.32 0.88
7/8 0.484 0.35 23.50 1.83
1-1/8 0.825 0.60 40.06 3.13
1-3/8 1.257 0.92 61.04 4.76
1-5/8 1.779 1.30 86.39 6.74
2-1/8 3.905 2.85 189.64 14.79
2-5/8 4.772 3.48 231.74 18.08
3-1/8 6.812 4.96 330.81 25.81
3-5/8 9.213 6.71 447.41 34.90
4-1/8 11.977 8.73 581.63 45.38
5-1/8 18.665 13.60 906.42 70.71
6-1/8 26.832 19.56 1303.03 101.65
8-1/8 46.869 34.16 2276.08 177.57
Refrigerant weight per 100 feet of pipe is based on 105°F condensing
temperature and 10°F sub-cooling, 140°F discharge temperature, and 40°F
saturated suction temperature.
Table 21: R-410A Refrigerant Charge
(Lbs . per 100 feet of Pipe)
Line Size OD Flow Area
Suction Line Liquid Line
Discharge
Line
40°F 105°F 140°F
inches in 2 2 .21 lb ./ft 3 58 .37 lb ./ft 3 12 .57 lb ./ft 3
1/2 0.145 0.22 5.88 1.27
5/8 0.233 0.36 9.44 2.03
7/8 0.484 0.74 19.62 4.22
1-1/8 0.825 1.26 33.44 7.20
1-3/8 1.257 1.93 50.95 10.97
1-5/8 1.779 2.72 72.11 15.53
2-1/8 3.905 5.98 158.29 34.09
2-5/8 4.772 7.31 193.43 41.66
3-1/8 6.812 10.43 276.12 59.46
3-5/8 9.213 14.11 373.45 80.42
4-1/8 11.977 18.34 485.48 104.55
5-1/8 18.665 28.59 756.58 162.93
6-1/8 26.832 41.10 1087.63 234.22
8-1/8 46.869 71.79 1899.82 409.12
Refrigerant weight per 100 feet of pipe is based on 105°F condensing
temperature and 10°F sub-cooling, 140°F discharge temperature, and 40°F
saturated suction temperature.
Table 22: R-407C Refrigerant Charge
(lbs . Per 100 Feet of Pipe)
Line Size OD Flow Area
Suction Line Liquid Line
Discharge
Line
40°F 105°F 140°F
inches in
2
1 .69 lb ./ft
3
64 .65 lb ./ft
3
8 .64 lb ./ft
3
1/2 0.145 0.17 6.51 0.87
5/8 0.233 0.27 10.46 1.40
7/8 0.484 0.57 21.73 2.91
1-1/8 0.825 0.97 37.04 4.95
1-3/8 1.257 1.48 56.43 7.55
1-5/8 1.779 2.09 79.87 10.68
2-1/8 3.905 4.59 175.32 23.44
2-5/8 4.772 5.61 214.24 28.65
3-1/8 6.812 8.01 305.83 40.89
3-5/8 9.213 10.83 413.63 55.30
4-1/8 11.977 14.09 537.72 71.90
5-1/8 18.665 21.95 837.98 112.04
6-1/8 26.832 31.56 1204.65 161.07
8-1/8 46.869 55.12 2104.22 281.34
Refrigerant weight per 100 feet of pipe is based on 105°F condensing
temperature and 10°F sub-cooling, 140°F discharge temperature, and 40°F
saturated suction temperature.