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AG 31-011 • REFRIGERANT PIPING DESIGN
Table 13: R-410A Minimum Capacity For Suction Riser (Tons)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (inches)
(°F)
(°F)
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8
2-1/8
2-5/8
3-1/8
3-5/8
4-1/8
Area (in
2
)
0 .146
0 .233
0 .348
0 .484
0 .83
1 .26
1 .78
3 .094
4 .770
6 .812
9 .213
11 .97
0
10
0.167
0.317
0.542
0.833
1.67
2.92
4.58
9.58
17.17
26.67
40.00
55.83
20
30
0.192
0.363
0.667
0.958
1.96
3.42
5.33
11.08
19.58
30.83
45.83
64.17
40
50
0.213
0.400
0.683
1.067
2.17
3.75
6.00
12.42
21.67
35.00
51.67
71.67
Refrigeration capacity in tons is based on 90°F liquid temperature and superheat as indicated by the listed temperature. Multiply
table capacities by the following factors for other liquid line temperatures. (Table data based on line size pressure drop formula
Liquid Temperature (°F)
80
90
100
110
120
130
140
1.05
1.00
0.94
0.90
0.83
0.77
0.72
Table 14: R-407C Minimum Capacity for Suction Riser (Tons)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (inches)
(°F)
(°F)
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8
2-1/8
2-5/8
3-1/8
3-5/8
4-1/8
Area (in
2
)
0 .146
0 .233
0 .348
0 .484
0 .83
1 .26
1 .78
3 .094
4 .770
6 .812
9 .213
11 .97
0
10
0.127
0.242
0.413
0.642
1.31
2.29
3.58
7.42
13.08
20.83
30.83
43.33
20
30
0.150
0.283
0.483
0.758
1.54
2.67
4.25
8.75
15.42
24.58
36.67
50.83
40
50
0.171
0.325
0.550
0.867
1.75
3.08
4.83
10.00
17.50
27.83
41.67
58.33
Refrigeration capacity in tons is based on 90°F liquid temperature and superheat as indicated by the listed temperature. Multiply
table capacities by the following factors for other liquid line temperatures. (Table data based on line size pressure drop formula
shown on page 2.17 of ASHRAE Handbook Refrigeration 2006.)
Liquid Temperature (°F)
80
90
100
110
120
130
140
1.05
1.00
0.95
0.90
0.85
0.80
0.74