ABSTRACT
Yard piping includes connecting conduits, collection and division boxes, valves and gates, and manholes and appurtenances between various treatment units. After the treatment units and the connecting pipes and appurtenances are marked on the layout plan, the head losses through pipings and treatment units are calculated. Hydraulic profile is the graphical representation of the hydraulic grade line through the plant. The elevations of treatment units and pipings are adjusted to give adequate hydraulic gradient to ensure gravity flow. Many treatment plants have encountered serious operational problems because of an inadequate hydraulic gradient through the various units. It is therefore important that the design engineer take proper care in developing the hydraulic profile. The chapter presents the basic principles of designing yard piping and preparation of hydraulic profile. It shows the calculation procedure and graphical representation of the hydraulic profile for the design example.
