Pipe Velocity Calculator

Formula

To calculate the Pipe Velocity:

\[ \text{PV} = 0.408 \times \frac{Q}{D^2} \]

Where:

\( \text{PV} \) is the pipe velocity (ft/s)
\( Q \) is the volumetric flow rate through the pipe (gpm)
\( D \) is the internal diameter of the pipe (in)

What is Pipe Velocity?

A pipe velocity describes the linear speed at which a liquid flows through a pipe. The pipe velocity depends on the volumetric flow rate of the liquid and the pipe’s internal diameter.

Example Calculation 1

Let's assume the following values:

Volumetric Flow Rate \( Q \) = 500 gpm
Internal Diameter \( D \) = 10 inches

Step 1: Calculate the pipe velocity:

\[ \text{PV} = 0.408 \times \frac{500}{10^2} = 0.408 \times \frac{500}{100} = 0.408 \times 5 = 2.04 \text{ ft/s} \]

So, the Pipe Velocity is 2.04 ft/s.

Example Calculation 2

Let's assume the following values:

Volumetric Flow Rate \( Q \) = 300 gpm
Internal Diameter \( D \) = 8 inches

Step 1: Calculate the pipe velocity:

\[ \text{PV} = 0.408 \times \frac{300}{8^2} = 0.408 \times \frac{300}{64} = 0.408 \times 4.6875 = 1.91 \text{ ft/s} \]

So, the Pipe Velocity is 1.91 ft/s.