Subject: Propane Forge Part

From: "[email-masked] 415.855.5707" <[email-masked]>
Date: Tue, 16 Apr 1996 15:49:13 -0800 (PST)

I can't believe it, but I am having a pretty tough time locating a supplier for
those little brass jets/nozzles/orifices used to meter the propane flow.  The
local appliance part store has some but they need an appliance model or part
number first (they really didn't want to deal with me for some reason).

I've looked at the thomas register and made about a dozzen calls to no avail. 
Also looked in the Grainger and MSC catalogues.

Anyone have a decent source for these things?

Joe McGlynn

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From: BILL PATE <[email-masked]>
Date: Wed, 17 Apr 1996 12:16:57 -0400 (EDT)

When I built my gas forge, I went to the propane gas dealer, not to 
an applicance store. He showed me the parts bins, let me pick out the part, 
and drilled the orifice with a little hand tool in his kit.

The brass orifice screws into a 1/4-28 hole of my manufacture - no problem.

I also bought the regulator there, but I had to get a 0-20 lbs. pressure 
gauge from a HVAC parts house.

Bill Pate

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From: [email-masked] (Raymond Coon)
Date: Wed, 17 Apr 1996 12:42:16 -0700 (PDT)

>>At 03:49 PM 4/16/96 -0800, you wrote:
>>>those little brass jets/nozzles/orifices used to meter the propane flow.  

I guess you are talking about the orifice and not a needle valve (which you
will also want).  I guess this is no great secret, (although it is from
Wayne Goddard's book on Damascus and Gas Forges) I hope he dosn't mind me
talking about it.  He suggests using a piece of copper tubing and pounding
it down around a small piece of drill rod to the size he wants.  I used a
different method.  I used a piece of 3/8 black iron pipe, (Inserted, angled
downstream, and welded into the main pipe which has the blower on it) put a
cap on the end of it, and drilled a small hole in the cap.  Works great.  If
I want to change the orifice size I go spend another nickle and buy another
cap and drill it and change caps.

R. Coon

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From: [email-masked]
Date: Wed, 17 Apr 1996 22:58:00 -0400

Butane orifices are available blank, so you can buy 'em and drill 'em to
size.  If you are cheap, you can make your own by brazing a plug into a piece
of copper pipe, then drill to suit.  Braze a fitting on also, if you need it.
 For a naturally aspirated forge at 700 feet of elevation, I use a #68 bit.
 This will allow welding temps if your burner tube is correctly proportioned.
                hollis