Calculation of

Required Pipe Diameter

Inputs

*Standard nominal U.S. pipe sizes in inches:

1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 10, 12, 14, 16, 18, 20, 24, 30, 42, 48, 54, 60

Outputs
Determining Friction Factor, f, assuming completely turbulent flow
[ f = 1.14 + 2 log10(D/e)-2 ]

Checking on whether the given flow is "completely turbulent flow"
(Calculate f with the transition region equation and see if differs from the one calculated above.)

[ f = {-2*log10[((e/D)/3.7)+(2.51/(Re*(f1/2))]}-2 ]
Calculating pipe diameter, D using the final value for f calculated in step 2
[ D  =  f(L/hL)(V2/2g) ]