Gas Pipeline faces Higher velocity in pipeline network.

[MIANCH]

Hi Als,
See attached screen shot of gas pipeline network, total length of pipeline is 335 km, many users are there, case was run for gas flow 650 MMSCFD and Pressure 740 psig. Pipeline ID is 33.25 inches. I cannot understand why gas velocity has increased after 160 km. Can anyone please explain this phenomenon.
Thanks

 

[LittleInch]

Well from that data it looks like the pressure drops from about 550 psi to 350 psi at the two point SLR07 and the Almergh tie in.

You need more data points or an understanding of what is happening at SLR07. Change of diameter or pressure?

 

[MIANCH]

SLR07 is sphere launcher & receiver in same area and located 98 km from starting point for power plant gas supply tie-in point. the only thing which is pipe facing downhill 80 meter and then uphill 180 meter after 170 km from the starting point.