Труба roughness — surface roughness coefficients
Surface roughness values для various труба materials used in трение loss calculations.
piperoughness
Overview
Absolute roughness values for common pipe materials, used in friction factor calculations.
Data Table
7 строк
Pipe Material | Absolute Roughness (ε)(mm) |
|---|---|
| Drawn tubing (glass, brass, plastic) | 0.0015 |
| Commercial steel / welded steel | 0.045 |
| Galvanized iron | 0.15 |
| Cast iron | 0.26 |
| Concrete | 0.3 |
| Wood stave | 0.5 |
| Riveted steel | 0.9 |
Источник: engineeringtoolbox.com
Notes
- Values are at standard conditions unless otherwise noted
- Always verify values for critical applications