Pipe Sizing

[pipeline]

Evening all.. got a question about pipe sizing, in the literature ive got, there doesn't seem to be anything about reducing down the pipe size along the same run of pipe, when calculating the pressure drop?.. because i've seen on plenty of job 28mm reduced down to 22m to go through joists? ive even seen the gas pipe go back up to 28mm on the vertical run.. all feed back appreciated. thanks

 

[AWheating]

gas compresses, water doh.

 

[Dotty]

Aaaaaaaand this is open forum.

Pipeline. Send a pm with your gsr details to gas man or redsaw.

When you've your yellow badge up I'll reopen this thread and move it to the private forum.