Pipe dimensioning

Ultra-Pure Gas Systems
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📝 How it works:
Calculates required pipe diameter based on volume flow and maximum permissible flow velocity

Fill in the fields below and click "Calculate".

Pipe dimensioning based on volume flow

Correct pipe sizing is essential for efficient fluid and gas systems. Our calculator determines:

  • Required inner diameter: For a given flow rate
  • Flow velocity: Optimum range per medium
  • Pipe nominal diameter: Select DN size according to DIN
  • Pressure loss minimization: Cost-effectiveness vs. investment
  • Erosion prevention: Preventing excessively high velocities

Recommended flow velocities:

  • Water (drinking water): 0.5-1.5 m/s (avoid noise)
  • Water (heating): 0.8-2.0 m/s
  • Waste water: 0.7-2.5 m/s (self-cleaning)
  • Compressed air: 6-20 m/s (lower = less loss)
  • Vapor: 20-40 m/s

Calculation: A = Q / v, where A = cross-sectional area, Q = volume flow, v = velocity. Then: D = √(4A/π)

Example: 1000 l/min water, desired velocity 1.5 m/s: Q = 0.0167 m³/s, A = 0.0111 m², D = 0.119 m = 119 mm. Next standard size: DN 125 (outer diameter depending on pipe type).

Important: Higher velocity = more pressure loss, but smaller (cheaper) diameter. Too low = large, expensive pipes. Find the optimum! Erosion of particles in the medium is critical: limit velocity significantly.

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