Enter the friction factor, the length (m), the inner diameter (m), and velocity (m/s), into the calculator to determine the Pipe Friction Loss.

## Pipe Friction Loss Formula

The following formula is used to calculate the Pipe Friction Loss.

Pfl = f * (L/D) * (V^2 / (2*g))

• Where Pfl is the Pipe Friction Loss (m)
• f is the friction factor
• L is the length (m)
• D is the inner diameter (m)
• V is the velocity (m/s)
• g is the acceleration due to gravity (9.81m/s^2)

## How to Calculate Pipe Friction Loss?

The following example problems outline how to calculate the Pipe Friction Loss.

Example Problem #1

1. First, determine the friction factor. In this example, the friction factor is given as .45 .
2. Next, determine the length (m). For this problem, the length (m) is given as  10 .
3. Next, determine the inner diameter (m). In this case, the inner diameter (m) is found to be .6.
4. Next, determine the flow speed. This is 12 m/s.
5. Finally, calculate the Pipe Friction Loss using the formula above:

Pfl = f * (L/D) * (V^2 / (2*g))

Inserting the values from above yields:

Pfl = .45 * (10/6) * (12^2 / (2*9.81)) = 5.504 (m)

Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are as follows:

friction factor = .87

length (m) = 12

inner diameter (m) = 1

velocity (m/s) = 14

Entering these given values and solving gives:

Pfl = .87* (12/1) * (14^2 / (2*9.81)) = 104.293 (m)