[TheForge] Re: Large flue pipe

[David E. Smucker]

I have had very luck with galvanized culvert.  Mine is a 15 or 16 inch and 
draws very well.  In fact I use it for both the forge and large woodstove. 
You can of course get bigger sizes -- mine cost about $160, 7 years ago.

I used the full 20 foot length, and I think that is as long as they come.  I 
have a fabricated "smoke box" at ceiling level that adds about 2 feet.  You 
might consider something like that, or a joint above the roof.  Hardest part 
about using the culvert is sealing a roof jack to the spiral of the culvert. 
I did this with sheet metal  cut out to the shape of the culvert and 
soldiered in place.  Works fine, but you need a special flux for the 
galvanized metal.  Any good sheet metal shop has this flux.

Dave Smucker

--------------------------------------------------
From: "Cindy and James" <jallcorn at suddenlink.net>
Sent: Saturday, August 30, 2008 10:57 AM
To: <theforge at mailman.qth.net>
Subject: [TheForge] Re: TheForge Digest, Vol 55, Issue 31

> Flue pipe?
>
> Any of you fellows ever built a coal forge flue using big steel pipe?  I 
> am looking for 16 - 24" pipe, no luck yet.  Any comments appreciated.  I 
> will need my flue to be approx. 25-30' tall to give 3-4' clearance above 
> roof line.  now is the time for this as if all goes well we will have a 
> new roof on the shop soon.
>
> Thanks,
> James
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