Steam Flow Rate vs. Pressure Drop - Schedule 40 Pipe
Steam flow rates in schedule 40 steel pipes with pressure drops ranging 1/16 to 2 psi:
For full table with higher pressure drops - rotate the screen!
Nominal pipe size (inch) | Flow Rate (lb/h) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pressure drop per 100 ft of pipe length | ||||||||||||||
1/16 psi (1 oz/in2) | 1/8 psi (2 oz/in2) | 1/4 psi (4 oz/in2) | 1/2 psi (8 oz/in2) | 3/4 psi (12 oz/in2) | 1 psi | 2 psi | ||||||||
Saturated Pressure (psig) | ||||||||||||||
3.5 | 12 | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | |
3/4 | 9 | 11 | 14 | 16 | 20 | 24 | 29 | 35 | 36 | 43 | 42 | 50 | 60 | 73 |
1 | 17 | 21 | 26 | 31 | 37 | 46 | 54 | 66 | 68 | 82 | 81 | 93 | 114 | 137 |
1 1/4 | 36 | 45 | 53 | 66 | 78 | 96 | 111 | 138 | 140 | 170 | 162 | 200 | 232 | 280 |
1 1/2 | 56 | 70 | 84 | 100 | 120 | 147 | 174 | 210 | 218 | 260 | 246 | 304 | 360 | 430 |
2 | 108 | 134 | 162 | 194 | 234 | 285 | 336 | 410 | 420 | 510 | 480 | 590 | 710 | 850 |
2 1/2 | 174 | 215 | 258 | 310 | 378 | 460 | 540 | 660 | 680 | 820 | 780 | 950 | 1150 | 1370 |
3 | 318 | 380 | 465 | 550 | 660 | 810 | 960 | 1160 | 1190 | 1430 | 1380 | 1670 | 1950 | 2400 |
3 1/2 | 462 | 550 | 670 | 800 | 990 | 1218 | 1410 | 1700 | 1740 | 2100 | 2000 | 2420 | 2950 | 3450 |
4 | 640 | 800 | 950 | 1160 | 1410 | 1690 | 1980 | 2400 | 2450 | 3000 | 2880 | 3460 | 4200 | 4900 |
5 | 1200 | 1430 | 1680 | 2100 | 2440 | 3000 | 3570 | 4250 | 4380 | 5250 | 5100 | 6100 | 7500 | 8600 |
6 | 1920 | 2300 | 2820 | 3350 | 3960 | 4850 | 5700 | 6800 | 7000 | 8600 | 8400 | 10000 | 11900 | 14200 |
8 | 3900 | 4800 | 5570 | 7000 | 8100 | 10000 | 11400 | 14300 | 14500 | 17700 | 16500 | 20500 | 24000 | 29500 |
10 | 7200 | 8800 | 102000 | 12600 | 15000 | 18200 | 21000 | 26000 | 26200 | 32000 | 30000 | 37000 | 42700 | 52000 |
12 | 11400 | 13700 | 16500 | 19500 | 23400 | 28400 | 33000 | 40000 | 41000 | 49500 | 48000 | 57500 | 67800 | 81000 |
- 1 in = 25.4 mm
- 1 ft = 0.3048 m
- 1 psi = 6895 Pa = 0.069 bar
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