Pipe Flow Calculations Forum

I'm calculating the preliminary orifice size for orifice type flow meter of a natural gas flow. However, I only have the following info: gas molecular weight: 24.18 gas mass flow rate: 11668 kg/h gas density: 9.7 kg/m3 pressure upstream: 9.9 barg Cp/Cv: 1.235 viscosity: 0.012 cP pipe ID: 10.14 inch ...