| Fluid Flow Table of Contents | Hydraulic and Pneumatic Knowledge
Fluid Power Equipment
| Pipe Material Roughness Coefficients |
| Pipe Material |
Specific Roughness
Factor, • , mm (in) |
Hazen-Williams
Coefficient, C |
Manning Factor, n |
Steel, welded and seamless |
0.061 (0.0002) |
140 |
- |
Ductile Iron |
0.061 (0.0002) |
130 |
- |
Ductile Iron, asphalt coated |
0.12 (0.0004) |
130 |
0.013 |
Copper and Brass |
0.61 (0.002) |
140 |
0.010 |
Glass |
0.0015 (0.000005) |
140 |
- |
Thermoplastics |
0.0015 (0.000005) |
140 |
- |
Drawn Tubing |
0.0015 (0.000005) |
- |
- |
Sources:
Hydraulic Institute, Engineering Data Book.
Various vendor data compiled by SAIC, 1998. |
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