quick gas capacity question

[johno12345]

Hi,

im not doing any work here, just looking at feasibility. How many kW can I get from a 1" tapping at 70mbar for natural gas. The supply is more than big enough, and again at 3/4"

or can anyone point me to how to work it out


Thanks

 

[ianmcd]

How are you going to get a Nat Gas Supply at 70 Mbar ?

 

[johno12345]

I already have the 70 mbar natural gas supply

 

[Madrab]

You shouldn't be contemplating/calculating anything that's upstream of the governor on the mainstream side of the domestic natural gas supply. Dangerous stuff that.

 

[johno12345]

its not up stream of the governor, that's the MP main, we have our own governors for each appliance whether its off the 70mbar system, or the 35mbar system

 

[ianmcd]

I already have the 70 mbar natural gas supply

No you dont , you have a Low pressure gas supply, which can be up to 75 Mbar, but will be reduced at the meter to around 20mbar maybe as low as 19Mbar you do not have a MP supply

 

[johno12345]

I can assure you that i do have a 70 and 35 mbar main in the building, since i use about 23MW of gas at peak.

I wouldnt have a governor on every appliance otherwise.

Anyway, i just wanted to know if i could get 60kW out of an existing 1"tapping at 70 mbar for a small water heater

 

[ianmcd]

I can assure you that i do have a 70 and 35 mbar main in the building, since i use about 23MW of gas at peak.

I wouldnt have a governor on every appliance otherwise.

Anyway, i just wanted to know if i could get 60kW out of an existing 1"tapping at 70 mbar for a small water heater

you dont,you cant possibly, argue all you want but you do not have a 70Mbar outlet legally

 

[johno12345]

Im not arguing, because i know what i have. Imagine the size of pipe id need for 1 megawatt at 20mbar

 

[ianmcd]

Im not arguing, because i know what i have. Imagine the size of pipe id need for 1 megawatt at 20mbar

No what you dont realise is that you can not have a 70Mbar outlet on a domestic meter, read it again you can not have it , never , nada, not going to happen ever

 

[johno12345]

Its not a domestic meter, obviously. I never mentioned a meter at all. Just pipe sizing

I dont know would have been an ok answer

 

[Gasguru]

This is a diy forum and you're asking industrial gas questions...those on the forum that would know don't frequent the Plumbing section.
Why don't you ask the site contractors?

 

[johno12345]

I asked because i thought someone might be able to point me to a calculator thats all. Its only one variable thats different to domestic gas

No site contractors. Yet, its just a feasibility thing im working on

 

[ianmcd]

I asked because i thought someone might be able to point me to a calculator thats all. Its only one variable thats different to domestic gas

No site contractors. Yet, its just a feasibility thing im working on

well it is simple , no you cant, you can not work on that supply under any circumstances

 

[bernardgreen]

but you do not have a 70Mbar outlet legally

Hope not. 70 Mbar is ‪‬ ‪1,015,264,207‬ pounds per square inch