A horizontal pipe 30 cm in diameterand 420 m long has a wall thickness of l cm. The pipe is commercial steel and carries water from a reservoir to a level 1 00 m below and discharges into the air. A rotary valve is installed at the downstream end. Calculate the maximum water hammer pressure that can be expected on the valve if it closes in a 0.5-sec period (neglect longitudinal stresses). Also determine the total (maximum) pressure the pipeline will be exposed to during the water hammer phenomenon.