Quick pipe-sizing recommendations
From Waller
Nominal size, inches | Water, gal/min | Steam supply, lb/h | Condensate return, lb/h |
Natural gas, ft3/h | Fuel oil, gal/h | |||||||
Branches |
Mains |
Low pressure |
Medium pressure |
LP system |
MP system | Low pressure | 10% Dp over a 500 ft EL |
75-ft suction line (max. length) | ||||
EL = 50 ft |
Dp = 4 ft H2O per 100 ft |
Dp = 0.25 psi per 100 ft |
Dp = 1.0 psi per 100 ft |
Dp = 0.12 psi per 100 ft |
Dp = 1.0 psi per 100 ft | 0.3 in WG Dp over a 200-ft EL | 2 psi | 10 psi | No. 2 oil | No. 4 oil | No. 6 oil | |
0.5 |
3 |
1.5 |
- |
- |
95 |
92 |
26 |
- |
- |
40 |
- |
- |
0.75 |
7 |
3.5 |
24 |
45 |
210 |
200 |
55 |
- |
- |
145 |
- |
- |
1 |
13 |
7 |
46 |
89 |
400 |
380 |
100 |
320 |
938 |
360 |
20 |
- |
1.25 |
25 |
13 |
96 |
199 |
840 |
800 |
210 |
660 |
1.925 |
500 |
60 |
- |
1.5 |
40 |
20 |
147 |
309 |
1 270 |
1 200 |
320 |
980 |
2 884 |
750 |
110 |
35 |
2 |
75 |
40 |
285 |
627 |
2 500 |
2 350 |
610 |
1 900 |
5 555 |
- |
210 |
90 |
2.5 |
120 |
60 |
460 |
1 033 |
4 030 |
3 780 |
980 |
3 000 |
8 850 |
- |
300 |
190 |
3 |
220 |
110 |
810 |
1 880 |
7 200 |
6 730 |
1 700 |
5 300 |
15 600 |
- |
- |
350 |
4 |
450 |
220 |
1 690 |
4 000 |
14 900 |
13 800 |
3 500 |
10 900 |
31 900 |
- |
- |
- |
6 |
1 200 |
650 |
4 850 |
12 000 |
44 300 |
19 600 |
10 300 |
31 900 |
93 500 |
- |
- |
- |
8 |
1 400 |
1 400 |
10 000 |
25 000 |
91 700 |
40 500 |
21 000 |
65 500 |
192 000 |
- |
- |
- |
10 |
2 400 |
2 400 |
18 200 |
47 000 |
164 000 |
72 000 |
- |
119 000 |
349 000 |
- |
- |
- |
12 |
4 000 |
4 000 |
28 400 |
74 000 |
261 000 |
116 000 |
- |
188 000 |
552 000 |
- |
- |
- |
14 |
5 000 |
5 000 |
42 100 |
105 000 |
384 000 |
190 000 |
- |
- |
- |
- |
- |
- |
16 |
7 000 |
7 000 |
59 000 |
147 000 |
541 000 |
239 000 |
- |
- |
- |
- |
- |
- |
18 |
10 000 |
10 000 |
80 000 |
155 000 |
568 000 |
251 000 |
- |
- |
- |
- |
- |
- |
20 |
14 000 |
14 000 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |