| PRESSURE LOSS | |||||||||||||
| C = 100 | SCHEDULE 40 GALVANIZED STEEL PIPE | ||||||||||||
| Pipe Sizes: Nominal Losses per 100 ft: lb/in2 | |||||||||||||
| gpm | 1/2 in | 3/4 in | 1 in | 1-1/4 in | 1-1/2 in | 2 in | gpm | 2 in | 2-1/2 in | 3 in | 4 in | 6 in | 8 in |
| 1 | 0.909 | 0.231 | 0.071 | 0.019 | 0.009 | 0.003 | 105 | 14.46 | 6.09 | 2.12 | 0.564 | 0.077 | 0.020 |
| 2 | 3.28 | 0.834 | .258 | .068 | .032 | .010 | 110 | 15.76 | 6.64 | 2.31 | .615 | .084 | .022 |
| 3 | 6.94 | 1.77 | .546 | .144 | .068 | .020 | 115 | 17.11 | 7.21 | 2.50 | .668 | .091 | .024 |
| 4 | 11.81 | 3.01 | 0.929 | .245 | .116 | .034 | 120 | 18.51 | 7.80 | 2.71 | .722 | .098 | .026 |
| 5 | 17.85 | 4.54 | 1.40 | .370 | .175 | .052 | 125 | 19.96 | 8.41 | 2.92 | .779 | .106 | .028 |
| 6 | 25.01 | 6.37 | 1.97 | .518 | .245 | .073 | 130 | 21.47 | 9.04 | 3.14 | .838 | .114 | .030 |
| 7 | 33.27 | 8.47 | 2.62 | .689 | .325 | .096 | 135 | 23.02 | 9.70 | 3.37 | .898 | .122 | .032 |
| 8 | 42.59 | 10.84 | 3.35 | 0.882 | .417 | .124 | 140 | 24.62 | 10.37 | 3.60 | 0.961 | .131 | .034 |
| 9 | 52.96 | 13.48 | 4.16 | 1.10 | .518 | .154 | 145 | 26.27 | 11.07 | 3.85 | 1.03 | .140 | .037 |
| 10 | 64.35 | 16.38 | 5.06 | 1.33 | .629 | .187 | 150 | 27.97 | 11.78 | 4.09 | 1.09 | 0.149 | 0.039 |
| 11 | 76.76 | 19.54 | 6.04 | 1.59 | .751 | .223 | 160 | 31.52 | 13.28 | 4.61 | 1.23 | .168 | .044 |
| 12 | 90.17 | 22.95 | 7.09 | 1.87 | 0.882 | 0.261 | 170 | 14.85 | 5.16 | 1.38 | .187 | .049 | |
| 13 | 104.56 | 26.61 | 8.22 | 2.17 | 1.02 | .303 | 180 | 16.51 | 5.74 | 1.53 | .208 | .055 | |
| 14 | 119.93 | 30.53 | 9.43 | 2.48 | 1.17 | .348 | 190 | 10 in | 18.25 | 6.34 | 1.69 | .230 | .061 |
| 15 | 34.68 | 10.71 | 2.82 | 1.33 | .395 | 200 | 0.022 | 20.06 | 6.97 | 1.86 | .253 | .067 | |
| 16 | 39.08 | 12.07 | 3.18 | 1.50 | .445 | 210 | .024 | 21.96 | 7.63 | 2.03 | .277 | .073 | |
| 17 | 43.72 | 13.51 | 3.56 | 1.68 | .498 | 220 | .026 | 23.93 | 8.32 | 2.22 | .302 | .079 | |
| 18 | 48.59 | 15.01 | 3.95 | 1.87 | .554 | 230 | .028 | 25.98 | 9.03 | 2.41 | .328 | .086 | |
| 19 | 2-1/2 in | 53.71 | 16.59 | 4.37 | 2.06 | .612 | 240 | .031 | 9.77 | 2.60 | .355 | .093 | |
| 20 | 0.283 | 59.05 | 18.24 | 4.80 | 2.27 | .673 | 250 | .033 | 10.54 | 2.81 | 0.382 | 0.101 | |
| 22 | .338 | 70.44 | 21.76 | 5.73 | 2.71 | 0.803 | 260 | .036 | 11.33 | 3.02 | .411 | .108 | |
| 24 | .397 | 82.74 | 25.56 | 6.73 | 3.18 | 0.943 | 270 | .038 | 12.15 | 3.24 | .441 | .116 | |
| 26 | .460 | 95.94 | 29.64 | 7.81 | 3.69 | 1.09 | 280 | .041 | 12.99 | 3.46 | .472 | .124 | |
| 28 | .528 | 34.00 | 8.95 | 4.23 | 1.25 | 290 | .044 | 12 in | 13.86 | 3.70 | .503 | .132 | |
| 30 | .600 | 38.62 | 10.17 | 4.80 | 1.42 | 300 | 0.047 | 0.020 | 14.76 | 3.93 | .536 | .141 | |
| 32 | .676 | 43.52 | 11.46 | 5.41 | 1.61 | 325 | .054 | .023 | 17.12 | 4.56 | .621 | .163 | |
| 34 | .756 | 48.69 | 12.82 | 6.06 | 1.80 | 350 | .062 | .026 | 19.63 | 5.23 | .713 | .187 | |
| 36 | .841 | 54.12 | 14.25 | 6.73 | 2.00 | 375 | .070 | .030 | 5.95 | .810 | .213 | ||
| 38 | 0.929 | 3 in | 59.81 | 15.75 | 7.44 | 2.21 | 400 | .079 | .034 | 6.70 | 0.912 | 0.240 | |
| 40 | 1.02 | 0.355 | 65.76 | 17.32 | 8.18 | 2.43 | 425 | .089 | .038 | 7.49 | 1.02 | .268 | |
| 42 | 1.12 | .389 | 18.95 | 8.95 | 2.65 | 450 | .099 | .042 | 8.33 | 1.13 | .298 | ||
| 44 | 1.22 | .424 | 20.66 | 9.76 | 2.89 | 475 | .109 | .046 | 9.21 | 1.25 | .330 | ||
| 46 | 1.32 | .460 | 22.43 | 10.59 | 3.14 | 500 | .120 | .051 | 10.12 | 1.38 | .363 | ||
| 48 | 1.43 | .497 | 24.26 | 11.46 | 3.40 | 550 | .143 | .061 | 12.08 | 1.64 | .432 | ||
| 50 | 1.54 | .536 | 26.17 | 12.36 | 3.66 | 600 | 0.168 | 0.072 | 1.93 | .508 | |||
| 52 | 1.66 | .577 | 28.14 | 13.29 | 3.94 | 650 | .195 | .083 | 2.24 | .589 | |||
| 54 | 1.78 | .619 | 30.17 | 14.25 | 4.23 | 700 | .223 | .095 | 2.57 | .676 | |||
| 56 | 1.90 | .662 | 32.27 | 15.24 | 4.52 | 800 | .286 | .122 | 3.29 | 0.865 | |||
| GLAVANIZED STEEL PIPE | |||||||||||||
| To construct the pressure loss table for galvanized steel | |||||||||||||
| pipe, the standard dimensions of steel pipe were used | |||||||||||||
| to determine average ID since both OD and wall thickness | |||||||||||||
| dimensions also have plus and minus tolerances. | |||||||||||||
| Losses are based on a "C" factor of "100" which is | |||||||||||||
| considered to represent the average roughness of | |||||||||||||
| fifteen-year-old galvanized steel pipe. An additional | |||||||||||||
| allowance should be made for older pipe or pipe | |||||||||||||
| suspected of accumulating heavy deposits from | |||||||||||||
| extremely corrosive water. | |||||||||||||
