Practical 3: Friction and Minor Losses in Pipes

Five materials are available for investigating friction losses:

1. Concrete lined (100mm)
2. Cast iron (100mm)
3. P.V.C. (100mm & 25mm)
4. Galvanised iron (25mm)
5. Polyethylene (25mm)

Surface roughness will be calculated from observed pressure loss at a given flow rate.

Pressure tappings in the pipes are connected to the pressure gauge for indication of pressure reading.

A 25 mm galvanised iron line contains a set of valves and bends for investigating minor losses.

Gallery

Different types of pipes create different amounts of friction thereby impacting on the flow rate.

The changes in water pressure, through the different pipe types, is measured at the end of the rig.