| Unit | Value |
|---|
Pipe size × velocity to flow
Estimated with ANSI SCH40 steel pipe inside diameters. Pick a DN, enter velocity, get flow.
| Nominal size | Inside dia. (mm) | Flow (m³/h) | Typical velocity (m/s) |
|---|
Mass flow (by density)
Volumetric flow × density = mass flow. Default: water 1000 kg/m³.
Typical design velocities
| Service | Velocity (m/s) |
|---|
Note: CFM / GPH are US units. Gas flow is often specified at normal conditions (Nm³/h @0 °C, 101.325 kPa) or at actual conditions (m³/h); they are not directly convertible without temperature and pressure correction.