A 400 mm steel pipe is 2000 m long and conveys 100 litre/s of water with a static head of 200 m at the downstream end of the pipe. If a valve at the downstream end is closed in 6 s, estimate the...

A 400 mm steel pipe is 2000 m long and conveys 100 litre/s of water with a static head of 200 m at the downstream end of the pipe. If a valve at the downstream end is closed in 6 s, estimate the stress in the pipe wall at the valve. The pipe thickness is 5 mm.

to slow and rapid closure respectively. l, C and T are the length of the pipe, the wave velocity and the time of valve closure respectively]