These equations handle fittings, instruments, block valves and different pipe sizes
An attempt to use my previously published
article1 to calculate gravity flowrate of an
existing piping system led me to realize that the work needs
to be broadened and generalized. Two situations were not
covered in the previous article: a gravity piping system may
contain various fittings (elbows, reducers, etc.),
instruments (such as orifice plates) and block valves, and an
existing gravity piping system may consist of two or more
different line sizes. These two aspects of gravity flow
calculation will be covered in a more generalized
approach.
A generalized gravity flow system. The system
is shown in Fig. 1. Li
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