8.13 Head loss in pipe nomogram and diagram

Head loss in pipe nomogram and diagram

Head loss in pipe nomogram and diagram consist of pre calculated diagram sheets with pressure losses in pipes for a number of commonly applied cases of flow are set out in this section in the form of diagrams. These diagrams and nomograms
can be used to calculate the losses in a system, i.e. flow losses in the pipes, valves, bends, etc.

This method is quick and provides acceptable results if carried out accurately.

A number of diagrams for the determination of the associated values of velocity, frictional losses, diameter and volume flow are presented. There are also diagrams for determining the flow velocity in cylindrical conduits in relation to the volume flow and diameter together with diagrams for the determination of loss of head (m) in bends fittings etc., related to the velocity of flow.

It is most practical when dimension pipes to be able, right from the outset, to assess the approximate economic flow velocity. By this means, the final economic dimensioning can be carried out more quickly, since fewer alternatives then have to be tested.