A piping system is shown below. Flow is from A to D and minimum pressure to be maintained is 20 psi.
|
Pipe
|
Length (ft)
|
Diameter (in)
|
Flow rate (gpm)
|
|
A-B
|
20,000
|
6
|
120
|
|
B-C
|
10,000
|
6
|
160
|
|
C-D
|
30,000
|
4
|
120
|
Hazen-Williams roughness coefficient C=140 for all the pipes. The elevations of A, B, C and D are 620, 460, 540, and 360 ft respectively.
Determine:
. Hydraulic gradient at A
. Pressure A, B, C, and D