Finding Natural Gas Velocity

Dear s-y,

The answer is too high! You should increase the pipe diameter and save yourself a lot of DP.

Massey.

Thanks for the reply, but i would like to know the formule used for calculating the natural gas velocity in pipes. Can you please post the calculation?

Hi s-y,

You could try the following website: www.pipeflowcalculations.com/download.htm

Regards,

Massey.

You need the temperature, also...

To calculate velocity:

Volumetric flow rate= mass flow rate (3164 kg/hr) / density of the fluid.

Calculate the inter diameter of the pipe and then calculate the internal area of the pipe.

velocity of the fluid inside the pipe is = volumetric flow rate / inside area

Thank You.

Dear all.

Thanks a ton for replies, but i just have a query that should we not consider the compressibity factors & the friction co-effcients also during our calculation in the velocity check? Should we not engage the darcy-weisbach equation or the roenard equation for the same?

Dear All,

I want to find out velocity of Natural Gas Flowing in a pipeline of distance around 30.0 meters, with flow rates ranging from 2584 kg/hr to 3164 kg/hr, inlet pressures of 30 kg/cm2(g) & exit pressures from the PCV'S 24 kg/cm2(g), with bends in pipe of around 6 nos. I am trying to minimize the number of bends further.. I need this info as soon as possible as i need to purchase the pipes. i am confused of whether to buy 2 inch pipe or 3 inch pipe...Request you all to please answer and help me!!! interms of velocity & pressure drops?

since Q=AxV

where A=Cross section area of the pipe

V=Velocity

Q=volumetric flow rate

find now.

The Weisbach-Darcy generalised pipe flow equation can be used.

A pressure drop of 0.2barg per metre is far too high.