[TheForge] burners

[Ron Childers]

James, blown forge burners are very simple. A 1& 1/2" T fitting with
about a 10" pipe to go into the forge and a 4" piece onto which to adapt
a hose (like a vacuum cleaner)and a plug drilled out in line with the
10" pipe for a 1/4" or 1/8" pipe to which a valve is attached for the
gas. The size of the orifice is not critical; 1/8" or 1/4" will work.
The small pipe extends just beyond the air inlet. I use a "red head"
regulator onto which a gage is attached and normally runs 5 or 6 lbs.
Simple, but it will reach welding heat in a Freon tank lined with kao
wool and satanite. It works best with a large gas supply as the 20lb
tanks will freeze up. If you have to use a small cylinder it helps to
keep some water hot to pour on it or have the tank in a tub of water.

 


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-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bob
Sent: Friday, December 30, 2011 3:03 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] burners

     I too am considering a natural gas forge but I have 12-15 lbs 
pressure available so I hope to go naturally aspirated. Still debating 
whether to build or buy the burner(s).

Bob Willman
The Eagle's Anvil
Bowling Green, Ohio
WB8NQW

The natural progress of things is for liberty to yield and government to
gain ground.

Thomas Jefferson
in a letter to E. Carrington,
May 27,1788


On 12/30/2011 2:24 PM, Cindy and James wrote:
> I'm looking to make a natural gas forge, most likely "blown" (as in
with
> a blower, not up... :-)).
> I presume the same design for a regular propane burner would work
except
> the orifice would have to be significantly larger.
> Just how MUCH larger?  I suppose trial and error could discover that
but
> 1 or more of you probably already know the answer.
>
> I say "blown" as I only have standard residential pressure, and I have
> heard you can "blow" a forge and achieve desired temps w/ low pressure
> service in this manner.
>
> my supply lines to the yet to be constructed forge (from the street)
are
> 1".  I'll probably use one of the large flex supply lines that is for
a
> tankless hot water heater, I think they are a full 3/4 or 7/8 inside.
>
> What type blower would be best?  I have a blower I used on the first
> coal forge I had that could be used.  it is electric and works well in
> that application but changed it simply because I came across a vintage
> blower from a buddy and it "looks better" attached to my coal forge.
>
> Where would I introduce the forced air?  Mixed with the gas thru the
> ventura ? or just into the burner chamber?
>
> If anyone asks "why" I'm doing this, the short answer is to be
"legal".
> My shop is completely enclosed and I have no location for a propane
tank
> outside.  The fire marshal advised it was illegal to have cylinder
> inside.  Of course, acetylene is ok, but not propane.
>
> James,
> NE Texas
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