Pipe Size Calculator (Based on Velocity)

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The pipe size calculated in this calculator is based on the Continuity Equation and maximum allowable velocity:

The equation of Continuity stated that “In a steady state system the values of the quantity and variables of the system do not
change with time”.

Figure: Continuity Equation Illustration

Tips: Enter the following data

  1. Volumetric Flow rate, cubic meter per hour (m3/hr)
  2. Maximum allowable velocity for Pipe size, meter per second (i.e for Gases 24 m/s and for Liquids 1.0 -1.5 m/s).

Click Calculate and find the Calculated size of the Pipe, Meter (m)

Volumetric Flow Rate (Q)
m3/hr
Selected Velocity (v)
m/s

OR

To calculate the Velocity through a Pipe

Volumetric Flow Rate (Q)
m3/hr
Pipe Size (d, Nominal Diameter)
mm

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