Gas pipe sizing technique

[mutley racers]

 

[mutley racers]

Not sure why it had loaded twice

 

[ShaunCorbs]

are you asking the question or someone else ????

 

[mutley racers]

I am asking the question. I can't seem remember when to stop dividing by 3 and then divide by 2.

 

[mutley racers]

I am asking the question. I can't seem remember when to stop dividing by 3 and then divide by 2.

I actually mean x by 3 to get the length of pipe to see the gas flow rate for the size of pipe

 

[Paulplumb]

This will refresh your memory Mutley.

http://www.ukcopperboard.co.uk/lite...ion-Tips/Domestic-gas-planning-and-sizing.pdf

 

[mutley racers]

It's how to turn the pipe into how many sections that's confusing mee

 

[ShaunCorbs]

It's how to turn the pipe into how many sections that's confusing mee

the drawing you have supplied would be done into 3 sections (a-b) meter - to first t, (b-c) first t - 20kw appliance, (b-d) first t - 40kw appliance, hope this helps

 

[mutley racers]

But this is only.3 sections apparently

 

[Paulplumb]

A - f
B - c
D - e

 

[Dotty]

Yep.

Section 1 - Meter to tee 60kw

Section 2 - Tee to 20kw appliance

Section 3 - Tee to 40kw appliance

I think the logic books make pipe sizing confusing.

 

[gasmanrob]

Igeup are easier to understand imo

 

[mutley racers]

And how many sections is this

 

[ShaunCorbs]

View attachment 22040

and how many sections is this

4

a - h ( But for working out you add appliances g and e (kw/m3h) in as well)
b - c
d - e
d - g

 

[Dotty]

View attachment 22040

And how many sections is this

Seven.

 

[ShaunCorbs]

Seven.

how did you come up with that?

 

[Dotty]

A - b
b - c
b - d
d - e
d - f
f - g
f - h

 

[ShaunCorbs]

A - b
b - c
b - d
d - e
d - f
f - g
f - h

can i ask the yea old master why he didnt go from a - h and just add the kw/m3h from g and e?

 

[mutley racers]

4

a - h ( But for working out you add appliances g and e (kw/m3h) in as well)
b - c
d - e
d - g

Still not getting it. Why did you miss the F out? Also, which ones would you x by 3 and not 4 and so on

 

[ShaunCorbs]

Still not getting it. Why did you miss the F out? Also, which ones would you x by 3 and not 4 and so on

didnt see it was listed sorry revised one

a - h ( But for working out you add appliances g and e (kw/m3h) in as well)
b - c
d - e
F - g

 

[ShaunCorbs]

Seven.

you sir are right

 

[Dotty]

can i ask the yea old master why he didnt go from a - h and just add the kw/m3h from g and e?

Just the way I've always done it. Simple and bombproof.

 

[ShaunCorbs]

i knew i seen that somewhere

have a read mut

 

[mutley racers]

Just the way I've always done it. Simple and bombproof.

The gas training books in your drop box croppie do it this same method?

 

[ShaunCorbs]

Just the way I've always done it. Simple and bombproof.

and what your used to

 

[Dotty]

The gas training books in your drop box croppie do it this same method?

Erm. Dunno if I'm honest.

 

[mutley racers]

My lunch break education. So, according to my calculations with a U16 meter and these gas pipe sizes I am able to work on this install as it it less than 0.035.

It is the same method used in tolleys book.

I still don't understand in the viper book why they only x the last section by 2 to get the drop and not 3 like the rest of them?

 

[ShaunCorbs]

View attachment 22047


My lunch break education. So, according to my calculations with a U16 meter and these gas pipe sizes I am able to work on this install as it it less than 0.035.

It is the same method used in tolleys book.

I still don't understand in the viper book why they only x the last section by 2 to get the drop and not 3 like the rest of them?

is it the old viper? and good lad you got there in the end, and btw thats one big cooker at 20kw

 

[mutley racers]

Yeah it is a range cooker that. It is the viper book yes. But I still don't understand this...

 

[AWheating]

what ever pipe you think it is its the next size up

 

[buckley plumb]

Use the one I sent you its the mist accurate one mate.