Pipe Diameter Calculator
Volumetric flow rate in cubic meters per hour
Target fluid velocity (0.6-2.5 m/s recommended for water)
What This Calculator Does
This calculator determines the standard commercial pipe diameter required to transport a specified fluid flow rate at your target velocity. Why it matters: Oversized pipes lead to unnecessary costs and potential sedimentation, while undersized pipes cause high pressure loss, noise, and erosion. The calculation process: 1) Converts flow rate to SI units (m³/s), 2) Calculates theoretical minimum diameter, 3) Selects next standard commercial size (DN), 4) Computes actual velocity with selected pipe, 5) Determines flow regime (laminar/turbulent).
Key Points:
- Uses standard DN (Nominal Diameter) sizes
- Validates actual velocity against optimal range (0.6-2.5 m/s)
- Calculates Reynolds number for flow regime analysis
- Provides both theoretical and actual values
Calculation Steps:
- Enter all required parameters
- Click "Update Calculation"
- Review results and analysis
Formula Variables:
D
Pipe Diameter
(mm)
Q
Flow Rate
(m³/s)
V
Velocity
(m/s)