[TheForge] propane forges

Tue Apr 9 19:42:00 2002

By orifice you mean the hole size for your gas jet right? if so I wouldve
thought 51 was a really big hole, I run #60's in my forge on my 3/4" burners
any bigger and it was way too rich.
----- Original Message -----
From: "Mike Sweany" <[email protected]>
To: <[email protected]>
Sent: Wednesday, April 10, 2002 12:53 AM
Subject: [TheForge] propane forges


>
> the most common mistake I see in propane forges, is using to big an
orifice for the size forge  being built.  I maintain that if you are adding
fans to counteract dragon breath (excess flame coming out of the forge) you
are trying to stuff to much heat into your forge. Much worse IMO is the
machinations we go through to keep the propane bottle from freezing if it is
freezing you are using waaaaaaaay to much fuel and getting no work from it.
Not to mention the excess scaling from to much oxy in the mix.
>
> Kinda like too much blast in a coal forge. It burns up a lot of coal but
doesn't get much done for the money.
>
> The propane forge heats, by heating the refractory, whatever it is ,and
the heat from the refrac. heating the work.  My little forge has a 11x 8" is
a venturi forge it has a #51 orifice and will weld on 10 psi and forge on
4 -5 psi
>
> I used to run a carbottom heat treat oven for a feedwater heater co.
>
> The old furnace burners shot incredable, roaring flames. scaling was
incredible. fuel use was really high.
>
> when it was rebuilt the engineer called the contractor on the carpet ,
because the flames weren't big enough.  The frunace was doing it's job on
half the fuel and the scaling problem was reduced 60%
>
> Playing with the orifice size IMO is probaly worth more than the ITC and
other "magic things" we invest in the forge.
>
> MY .02
>
>
>
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