Recent content by EngineerBR

I've double checked the density, by both using SG and looking up it's listed rho, and it is correct. However, you're right that the flow won't be choked in my case. So I'll have to go to Euler's equations from here for a reality check. Thanks for your help.

Thanks. Although I'm still having some trouble creating the same asnwers as this approximation. Maybe you can point out where I'm going wrong? For my case, the back pressure is 414.7 psia, 4" orifice diameter, with natural gas (SG = .6, density = .0014 slugs/cf, k = 1.27). A = 3.14*(2 in)2...

Thanks for your help. I figured it had to be right, I was just curious/confused about their logic. What equation did you use to check it? I was using Bernoulli's and getting flows significantly lower, but then I realized that I was analyzing a compressible substance (Natural Gas) and...

The Pipeline Rules of Thumb Handbook uses the equation Q = D^2*P to estimate the flow rate of escaping gas from a pressured line (see link below for excerpt) under standard conditions. Where Q is flow rate in Mcf/hr, D is diameter of the nipple or orifice in inches, and P is the absolute...