Pipe Flow Calculations Forum

It is not changing with the pressure or the temperature. It is constant for a certain gas. R in terms of J/kg K is calculated as Ru/M where Ru is universal gas constant for any gas and particular molar mass. Ru = 8.314 J/mol K. In your formula pV=nRT you are using Ru. in a pV=mRT or p/rho = RT formu...

First, you have to enter absolute, not gauge pressure.
Check the pipe diameter that you are entering, as well as critical pressure and temperature for LPG.
Also, select to enter w (on the right side of the calculator) and then enter mass flow rate.
Hope this helps.

Hi,
Here is the equation used in the calculator:
https://www.pipeflowcalculations.com/pi ... cy-formula

You can press copy button in the calculator and your results will be in clipboard, and then paste here to check.

Zoran

I would suggest you to use gas pressure drop calculator.

Natural gas calculator is for up to 100 bar so it is surely steel pipe.

You can find one on the left side menu called K factor - fittings.

I have used my calculator for gas flow on pipeflowcalculations.com. As you say the fluid is air than one can use air pressure drop calculator available on the same web site. I have divided the process into segments: A. What I have done is calculate flow rate for 12 bar inlet and 6 bar outlet. B. Aft...

This type of calculation requires differential equation solution, meaning it is not an easy task, because the pressure on the exit of the pipe line is changing from 6 bar to 12 bar, and flow through connecting pipeline slows every moment. As you want to fell 5000 m3 tank through 1" pipe - I can...

It is density x velocity^2 x area

Try with gas pressure drop calculator. It will work ok for your problem.