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Extol of Ohio, Inc.

info@ExtolOhio.com || 208 Republic St, Norwalk, OH 44857
Ph: 800.486.9865 || Or: 419.668.2072 || Fx: 419.663.1992

FLOW RATE OF STEAM IN SCHEDULE 40 PIPE
PRESSURE DROP PER 100 FT OF 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
NOMINAL PIPE SIZE, IN. SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 12 SAT. PRESS. 3.5 PSIG 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 /12 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
Notes 1. Flow rate is in lb/h at initial saturation pressure of 3.5 and 12 psig. Flow is based on Moody friction factor, where the flow of condensate does not inhibit the flow of steam.
2. the flow rates at 3.5 psig cover saturated pressure from 1 to 6 psig, and the rates at 12 psig cover saturated pressure from 8 to 16 psig with an error not exceeding 8 %
3. The steam velocities corresponding to the flow rates given in this table can be found from figure 10 and 11.
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Ph: 800.486.9865 || Or: 419.668.2072 || Fax: 419.663.1992
info@ExtolOhio.com || Located at:
208 Republic Street, Norwalk, Ohio 44857