Dear 1969grad,
The Renouard Equation is,
(P1)^2-(P2)^2= 48.6xdxLx(O)^1.82x(Di)^-4.82
where ,
P1 inlet pressure,bar
P2 outlet pressure,bar
d=gas fictive density app. 0.56
L=length of pipe,mt
Q=gas flow rate,mt3/hr
Di=inside pipe diameter,
and the criteria is V, velocity
V=(353.9xQ)/(P2xDi^2)
if...