Flow through pipe at 40 psi 1

[rrewis]

I need to determine the flow of water in gpm through a 12" section of 4" diameter schedule 40 steel pipe under 40 psi of constant pressure. Temperature and elevation out of the equation. Is an answer possible with such limited information or is this question so "kindergarten" that I should be ashamed to even ask?

Russell

 

[ione]

Katmar,

Thanks for your care. Actually my mind was not tuned with the OP’s question.
I am aware that there is a reversible component in the pressure drop (the acceleration pressure drop) in presence of flow area change, but in this case I had misinterpreted what the OP was looking for (not that the question was posed in the best way).

 

[mauricestoker]

I would guess that the gigantic change in Reyolds number over one foot difference, as opposed to an assumed median velocity, some problem can occur.

 

[rrewis]

Thank you all very much.