Why is it necessary to enlarge the diameter of the pipeline downstream of the control valve?
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This is the feed line for the tower. May I ask, why is it necessary to enlarge the diameter after the control valve? (But not all the feed lines in our plant are like this; only those of the negative-pressure towers are.)
Generally, it is to reduce the flow velocity in the pipes; for safety reasons, it also results in lower noise and less erosion. If flashing occurs, the gas-liquid two-phase flow must expand in diameter.
To reduce pressure while maintaining flow rate and velocity, it is necessary to increase the cross-sectional area