Pipe Size Recommended for Transmission of Compressed Air at 80-125 PSI

Discharge of Air Through an Orifice

DIAMETER OF ORIFICE
  1/64" 1/32" 1/16" 1/8" 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 11/4" 11/2"
PSI DISCHARGE IN CUBIC FEET IN FREE AIR PER MINUTE
15 .105 .420 1.680 6.72 26.90 60.50 108 168 242 329 430 672 968
20 .123 .491 1.960 7.86 31.40 70.70 126 196 283 385 503 786 1132
25 .140 .562 2.250 8.98 35.90 80 144 225 323 440 575 898 1294
30 .158 .633 2.530 10.10 40.50 91.10 162 253 365 496 648 1013 1458
35 .176 .703 2.810 11.30 45.00 101 180 281 405 551 720 1125 1620
40 .194 .774 3.100 12.40 49.60 112 198 310 446 607 793 1238 1784
45 .211 .845 3.380 13.50 54.10 122 216 338 487 662 865 1352 1946
50 .229 .916 3.660 14.70 58.60 132 235 366 528 718 938 1466 2111
60 .264 1.060 4.230 16.90 67.60 152 271 423 309 828 1082 1691 2435
70 .300 1.200 4.790 19.20 76.70 173 307 479 690 939 1227 1917 2761
80 .335 1.340 5.360 21.40 85.70 193 343 536 771 1050 1371 2142 3085
90 .370 1.480 5.920 23.70 94.80 213 379 592 853 1161 1516 2369 3411
100 .406 1.620 6.490 26 104 234 415 649 934 1272 1661 2595 3737
125 .494 1.980 7.900 31.6 126 284 506 790 1138 1549 2023 3161 4552