Hi,
I've recently started working for a company as a graduate engineer.
In one of the excel spreadsheets prepared by one of our senior engineers there is a section which calculates the mass flow rate in pipelines as below:
M=Ro * V * A
Where Ro= density of gas
V= Velocity
A= Cross section area
We work on different projects with different pressures of natural gas but for all of them they use Ro=0.8 kg/m3 which is the density of natural gas in standard conditions and they don't consider the pressure of gas in the pipeline!
Please correct me if I'm wrong. I say they should calculate the gas density according to the gas conditions in the pipeline.
Your thoughts please.
Thank you.