Be careful wh3n applying the friction factor. Sometim3s it is d3finid aa
f=hl÷((L÷D)(u^2÷(2×g))
For compressible fluids fo3 non critical flow deltap less to 10% P1
P1= upstream pressure, psia
If deltaP major to 10% P1
DeltaP=P1-P2=2×P1÷(P1+P2)×(0.323×(fL÷d+ln(P1÷P2)÷24× S1×U1^2)
Assusme isothermal flow of ideal gas
S1 especific gravity
d pipe diameter
f friction factor
L length of pipe
DeltaP=Pressure dropt 7n psi
M m8lecular wt.
P1,P2=Upstream and downstream pressure in psi ABS
S1 relative to water = 0.00150