Gas volume calculation

[I-kal]

hey Guys I wonder if someone could help me out.

I wanted to find out if I could work on this domestic installation. It’s a house with 2 boilers 24 kw each so 48 in total, the gas meter is a g10 which I believe can be used as domestic and commercial. The gas pipe is run in majority 28 mm at 12 meters and 2 metres in 22mm. What would be the volume of gas in as I am aware as a domestic engineer I can work on 70kw and less with upto 35mm pipe and a gas volume of 0.035m3 and less. Appreciate the help thanks

 

[Riley]

First things first are you gas safe?? I’m assuming yes. Daft as it is because it’s pretty specific but we do not discuss has topics in open forum. Send a copy of the front and back of your card to @Riley @Harvest Fields or @ShaunCorbs and get your posts up to ten or more and we’ll get you access to the gas safe only section.

 

[I-kal]

Hi yes I am, when signing up I had to give my gas safe number but I will send over a pic to the above.

 

[Riley]

That’d be really kind mate.

 

[I-kal]

Just sent it over let me know is you have received. Cheers mate.

 

[Scott_D]

What volume do you get when you work it out?

 

[I-kal]

This is the thing it’s over by quiet a bit so I must be doing soemthing wrong. I have been going over books etc to see if my working are correct so I thought someone on here could guide me.

 

[Riley]

Show us your workings

 

[ShaunCorbs]

fill this out

28 mm at 12 meters _________ x 12 =
2 metres in 22mm __________x 2 =

total = ______

+ 10%

total iv _______

g10 meter _____

Ivt _____

its close

 

[snowhead]

Are you adding pipework to the system, in which case it may be under to start but over after the addition?
Or just working on the boilers?

 

[I-kal]

No pipework adding just working on boilers and issuing a landlords gas safety

 

[I-kal]

I have got 0.032832 m3

 

[ShaunCorbs]

so have i

28 mm at 12 meters 0.00054 x 12 = 0.00648
2 metres in 22mm 0.00032 x 2 = 0.00064

total = 0.00712

+ 10%

total iv 0.007832

g10 meter 0.025

Ivt 0.032832

 

[I-kal]

Judging by that it’s very close, will need to make sure measurements of gas pipework is spot on in this case.

 

[Riley]

Agreed.

 

[I-kal]

Thanks guys really appreciate the help

 

[Riley]

No worries stick around it’s a great resource for pros and diy alike

 

[I-kal]

I will do, lots of wisdom on the forum, will hope to gain and return too.