Steam Pipes - Max. Flow and Pressure Drop
Pressure drop and maximum allowable flow in steam pipes.
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| Mains | Laterals | |||||
|---|---|---|---|---|---|---|
| Pressure(psi) |
600 | 175 | 30 | 600 | 175 | 30 |
| Pressure Drop (psi per 100 ft pipe) |
0.7 | 0.5 | 0.3 | 1 | 0.7 | 0.5 |
| Nominal Pipe Size (in) | Maximum Flow (103 lb/h) | |||||
| 3 | 6.2 | 2.7 | 0.9 | 7.5 | 3.6 | 1.2 |
| 4 | 12 | 5.7 | 2.5 | 15 | 7.5 | 3.2 |
| 6 | 33 | 16 | 6.6 | 40 | 21 | 8.5 |
| 8 | 63 | 32 | 14 | 76 | 42 | 18 |
| 10 | 108 | 58 | 25 | 130 | 76 | 32 |
| 12 | 158 | 87 | 39 | 190 | 115 | 50 |
| 14 | 217 | 117 | 54 | 260 | 155 | 70 |
| 16 | 300 | 166 | 78 | 360 | 220 | 100 |
| 18 | 227 | 101 | 300 | 130 | ||
| 20 | 132 | 170 | ||||
- 1 psi (lb/in2) = 6,894.8 Pa (N/m2)
- 1 ft (foot) = 0.3048 m
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