Question

A certain process requires 3.0 cfs of water to be delivered at a pressure of 30 psi. This water comes from a large-diameter supply main in which the pressure remains at 60 psi. If the galvanized iron pipe connecting the two locations is 200 ft long and contains six threaded 90o elbows, determine the pipe diameter. Elevation differences are negligible.

Answer 1

Answer:

diameter of the pipe = 0.4932ft.

Explanation:

assuming d = 0.4932

Re = 3.16 x 10∧5/0.4932

= 6.4 x 10 ∧5

E/d = 0.0005/0.4932

= 0.0010 from moody chat t = 0.02

if 0.02 is beign substituted in equation 2 we will get the same required diameter of the pipe which is 0.4932ft.

check the attachment  for better explanation.thanks