74 5 Pressure and power calculation In previous chapters we discussed how to calculate friction factors and pressure loss due to friction in a pipeline using various equations such as Colebrook-White, Hazen-Williams, etc. We also analyzed the internal pressure allowable in a pipe and how to determine pipe wall thickness required for a specific internal pressure and pipe material, according to design code. In this chapter we analyze how much pressure will be required at the beg inni ng of a pip eline to safely tran spor t a given thr ough put to the pipeline terminus, taking into account the pipeline elevation profile and the pipeline terminus pressure required, in add ition to friction losses. We will also calculate the pumping horsepower required and in many cases also determine how many pump stations are needed to transport the specified volume of liquid. We also examine pipes in series and parallel and how to calculate equivalent length of pipes in series and the equivalent diameter of parallel pipes. System head curves will be introduced along with flow injection and delivery along the pipeline. Incoming and outgoing branch connections will be studied as well as pipe loops. Copyright © 2004 by Marcel Dekker, Inc.
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