Pipe Velocity & Pressure Drop
Real-time fluid dynamics calculator
System gravity (ค่าความเร่งโน้มถ่วงที่ระบบใช้): g = 9.80665 m/s²
Liters per Minute
Or select from dataset
m
Roughness Reference Table (ε)
Standard values used with Darcy-Weisbach / Colebrook-White / Moody Chart for new and clean pipes
| Pipe Material | ε (mm) |
|---|---|
| Commercial Steel | 0.045-0.046 |
| Stainless Steel | 0.015 |
| Galvanized Steel | 0.15 |
| PVC / Smooth Plastic | 0.0015 |
| HDPE / PE | 0.007 |
| Cast Iron | 0.26 |
Calculation Results
Velocity (v)
0.85 m/s
Reynolds Number
42441
Flow Regime
turbulent
Roughness Not Verified: Turbulent friction calculation requires absolute roughness. Please provide a Custom Roughness value above.
Geometry Provenance
Custom Input
Note on Pressure Drop:Pressure Drop shown here represents straight-pipe major friction loss calculated with the Darcy-Weisbach equation. Minor/local losses are not included.
Turbulent friction calculation requires source-verified absolute roughness, which is currently unavailable for this pipe.