Commercial gas pipe sizing

[ShaunCorbs]

We will have to have a new gas meter installed anyway if the job goes ahead as the current one will be undersized. Can you shed some light on typical meter operating pressures? I understand that standard domestic is 21 mbar, the current meter on site just says <75mbar. What's likely to be the standard operating pressure of that meter? Can we go to higher pressures? and does that bring in more complications? I would guess the usual way is to keep pressures past the meter low and to increase pipe diameter?

Cheers.

You would have to speak to the network provider see what they can supply

If you go with steel tube get a commercial engy to work out what he requires, and get him to install it with a coded welder

 

[joni os]

Otherwise I'll have to take it back to basic fluid mechanics & have to do lots of research into pipe roughness, calorific values, specific densities, the effects of pressure on pipe wall friction and velocities, the bloody Darcy-Weisbach formula, etc etc...

Surely there's a simple formula to calculate as accurately as reasonably practicable the required diameter? I can't imagine day to day plumbers having to do this every time they size a pipe.

The "Pole Formula" is a simplified version of Darcy's but underestimates pressure drop as diameter of pipes decreases.
Boilers, even if domestic, will require fitting by commercial gas fitters because of meter and volume of gas in system.
Why is the option of bringing meter closer to plant not available.

 

[Riley]

Dear lord

 

[SimonG]

Dear lord

He'll be along in a bit

 

[rpm]

, the bloody Darcy-Weisbach formula, etc etc...

:hand:

 

[rpm]

, the bloody Darcy-Weisbach formula, etc etc...

:hand:

 

[Rickster123]

I'm closing this thread because I'm a "day to day plumber".

No gas advice given here.