Crude oil ( ¼ 40 cP, SG ¼ 0:87) is to be pumped from a storage tank to a refinery through a 10 in. sch 20 commercial steel pipeline at a flow rate of 2000 gpm. The pipeline is 50 mi long and contains...

Crude oil ( ¼ 40 cP, SG ¼ 0:87) is to be pumped from a storage tank to a refinery through a 10 in. sch 20 commercial steel pipeline at a flow rate of 2000 gpm. The pipeline is 50 mi long and contains 35 908 elbows and 10 open gate valves. The pipeline exit is 150 ft higher than the entrance, and the exit pressure is 25 psig. What horsepower is required to drive the pumps in the system if they are 70% efficient?