Oil is transported from A,B and C to main pipeline. main pipeline goes to terminal. A B and C discharge pressures are 20 barg with same flow rate. what will be happen if I close the valve in A line? how pressure of main pipeline will change? Why?
If all is well connected the pressure in the main pipleine will not really change much but the mass stream from pipes B and C will rise as it does not need to compete with line A
That's what I think too.
the only case in my opinion where there could be a pressure drop in the main pipeline would be if it has a much larger cross-section than pipes A, B and C.
Thank you very much for answers:).
Indeed, there is separator in the downstream of pipe, it means we have constant pressure operation for separation, ( constant donstream pressure)
When pipe A instantly closed, the moving mass in the main line will still want go further in the same manner but will miss feed from A, which shell result in the instant pressure drop. This pressure drop will propagate through the whole system (main line, pipe B and C as well) at the speed of sound (hydraulic hammer).
Eventually the pressure in the main line will return to normal (20 barg), after some kinetic energy has converted to heart.
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