Pump outlet pipe diameter
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The last edit to this post was made by 2005180005 on 2020-1-14 at 18:47. If the diameter of the pump outlet pipe is chosen to be larger (i.e., the diameter is 2 sizes larger than that of the pump outlet), will two-phase flow occur (preventing the fluid from filling the pipe completely), which could lead to noise?
It won’t happen, as long as the angle of change in diameter is appropriate
Generally not, but if you’re worried, you can try to increase the length of the transition section
Generally, this doesn’t happen. For centrifugal pumps, it is necessary to close the outlet valve before starting the pump; if the diameter of the pump’s outlet pipe is large, it may cause the pump to experience excessive current and thus stop operating. In the case of positive displacement pumps, this will result in the actual flow rate being lower than the designed flow rate； If you are transporting C4 or C5 liquefied hydrocarbon materials, some vaporization may occur; therefore, it is best to choose pipe diameters that are suitable for such conditions.