Simple estimation of pipe fitting pressure drop
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Regarding pipes, the pressure drop curve at 100m can be used to determine it; as for the fittings on the pipes, I’m not very clear about this. I would like to ask the experts: bends and tees certainly require consideration of pressure drop, but what about valves? For long distances, such as 200m of piping, can the pressure drop of certain valves be ignored, such as linear valves like ball valves? So which valves cannot be ignored, and how are they generally estimated? I mean estimation, not precise calculation; of course the principle can be explained, but empirical constants are more practical~! Thank you
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Fittings (valves, elbows, etc.) all have equivalent lengths! It can be converted to a straight pipe section to calculate the pressure drop.
This issue is very important; experience plays a role, but hydraulic calculations are also crucial. Foreign countries attach much greater importance to it than China does