Running an LPG line for my Range

[Dannypipe]

Hi all.

The wife and I have just bought our first place, and before we move in I have to do various jobs.

I'll be chasing out pipe runs as the place has no central heating. It also doesn't have any gas.

I really want a gas hob. So while I'm doing the mucky work, I'm going to run my gas line to the garden where I plan to site a small LPG tank (the type you take to get refilled).

Anyway, I'm only trained and qualified in NG, so I will get someone in (or might get my LPG ticket by the time I get round to it).

What I'm getting at is I want to do the pipe run now, and the kitchen will happen in a year or two, but I want the pipe run to be adequate. I know, LPG is delivered from the tanks at higher pressure than 21mb.

So do I work out my pipe size as for NG or is there a different equation?

I don't know wheter I'll go back garden or front. Back and it's about a 25M pipe run with about 3 elbows. Front and it's about 3M with the same.

I realise I'll have to change the jets for LPG and like I said this is a long time down the road. I just want to get the pipe first fixed while I'm tearing walls down and fitting the heating.

Wife thinks we should just have an electric hob, but I've always wanted a nice big Gas range, and eventually I'm going to get one!

 

[Gray0689]

No mate LPG is different to NG runs at 37mbar
Depending on size of range and length of pipe work

 

[Dannypipe]

37MB, I thought so. I still guess I'm looking for minimal pressure lose over the run. I just don't want to run a 22mm pipe through my house if its over kill.

Funny, with a customer it wouldn't faze me so much.

 

[Gray0689]

You say 25m pipe run and a few elbows
Depends on what kw the range will be
15mm over 24metre straight run will give you 12kw with a maximum pressure drop of 2.5mbar

22mm over same distance will give you 61kw with same pressure drop

So all on size of the range you want
Hope that helps Danny

 

[Gray0689]

Ps also well done on new house

 

[Dannypipe]

Cheers mate. Its been a long haul, and we're both very excited, despite the long road ahead of living in a building site with two kids!

I don't know what size the range will be, but I'm pretty sure it won't be 12KW or more. I usually aim for max pressure drop of 1mb but I'll need to think about it.

In an ideal world I would like to do the whole internal run in 12mm plastic coated copper. From the front garden I could do the whole run without a single joint. Lovely.

Thanks for the advice.

 

[Gray0689]

If range going to be 12kw or less just use 15mm plastic coated copper straight from regulator to back of range then just get a LPG cooker hose kit
2.5mbar is permissible drop on LPG
Forget NG lol
And you will just do it with a 25metre roll too lol

 

[Dannypipe]

Perfect, ta Gray.

I'll get my LPG ticket in between first fixing and second, so I'll make sure the install is all good, but as explained I just want to ensure my first fix is done properly.

I will do as suggested, many thanks mate.