Pipe Roughness: Fiberglass (FRP/GRP) pipe to PVC pipe
Pipe surface roughness values — absolute roughness for various pipe materials used in Moody diagram / friction factor calculations
| material | roughness ft (ft) | roughness in (in) | roughness mm (mm) |
|---|---|---|---|
| Fiberglass (FRP/GRP) pipe | 0.000016 | 0.000197 | 0.005 |
| Galvanized steel pipe | 0.000492 | 0.005906 | 0.15 |
| Glass pipe | 0.000005 | 0.000059 | 0.0015 |
| HDPE pipe | 0.000023 | 0.000276 | 0.007 |
| PVC pipe | 0.000005 | 0.000059 | 0.0015 |
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