배관 roughness — surface roughness coefficients
Surface roughness values for various 배관 materials used in 마찰 loss calculations.
piperoughness
Overview
Absolute roughness values for common pipe materials, used in friction factor calculations.
Data Table
7 행
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 |
출처: engineeringtoolbox.com
Notes
- Values are at standard conditions unless otherwise noted
- Always verify values for critical applications