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Reasonable Velocities of fluid in Pipes
| Medium | Pressure (bar) | Service | Velocity (m/s) | Notes |
| Steam (sat) | 0 - 1.7 | Heating | 20 to 30 | + 100mm dia |
| Steam (sat) | over 1.7 | Process | 30 to 50 | +150mm dia |
| Steam (sup) | over 14 | Process | 30 to 100 | +150mm dia |
| Air | | Forced Air Flow | 5 to 8 | e.g. AC Reheat |
| Water | - | General | 1 to 3 | |
| Water | | Concrete Pipe | 4,7 | |
| Water | | Pump Suction | 1,2 | |
| Water | | Horizontal Sewer | 0,75 | Minimum |
| Water | | Pump discharge | 1,2 to 2,5 | Minimum |
| Water | | Boiler Feed | 2,4 to 4,6 | Minimum |
| Oil | | Hydraulic Systems | 2,1 to 4,6 | Minimum |
| Ammonia | | Compressor Suction | 25 | Max. Permissable |
| Ammonia | | Compressor Discharge | 30 | Max. Permissible |
