With this tool, it is possible to easily calculate the pressure drop of fluids moving through a tube or pipe. There are two versions of the tool available, allowing you to use the Pipe Roughness Coefficient for a number of materials or if you have the roughness measurement of the pipe, then that can be entered on the advanced version, as well as the fluid density and velocity.
If you need help working out the Flow Rate, take a look at our Flow Rate Calculator.
How to use: Enter the information about the pipe to work out the pipes pressure drop.
Need more options? Switch to the advanced view
The simple version of the pressure drop calculator uses the following equation to calculate pressure loss due to pipe friction:
Pressure Loss = 4.53 x Pipe Length x (((Flow Rate / Pipe Coefficient)1.852) / (Pipe Diameter)4.857)
The advanced version of the calculator has a number of steps to work out the pressure.
Friction Factor = 1.14 + 2log10(Pipe Diameter / Pipe Roughness) – 2
Frictional Head Loss = Friction Factor * (Pipe Length / Pipe Diameter) * (Average Velocity2/(2*32.17))
Frictional Pressure (PSF) = Fluid Density * 32.17 * Frictional Head Loss
Frictional Pressure (PSI) = Frictional Pressure (PSF) / 144
| Material | Roughness (mm) |
|---|---|
| Aluminum and Lead | 0.001 – 0.002 |
| Asphalted Cast Iron | 0.012 |
| Cement | 0.3 |
| Concrete | 0.3 – 3 |
| Corroding Cast Iron | 1.5 – 2.5 |
| Drawn Brass, Drawn Copper | 0.0015 |
| Fiberglass | 0.005 |
| Galvanized Iron | 0.015 |
| Galvanized Steel | 0.15 |
| New Cast Iron | 0.25 – 0.8 |
| Ordinary Wood | 5 |
| PVC and Plastic Pipes | 0.0015 |
| Riveted Steel | 0.9 – 9 |
| Rusted Steel | 0.15 – 4 |
| Stainless Steel | 0.015 |
| Steel Commercial Pipe | 0.045 – 0.09 |
| Stretched Steel | 0.015 |
| Weld Steel | 0.045 |
| Well Planed Wood | 0.18 – 0.9 |
| Worn Cast Iron | 0.8 – 1.5 |
Remember, if you would like some assistance in choosing the right hose for your application or sector, please feel free to contact one of our helpful team members on 0116 240 1500 or email sales@copely.com.
