[TheForge] Propane Forge - Bending the burner

Wed Sep 11 07:15:01 2002

        Marc,  Using a friends hossfeld (come on over), or some old hour
glass rollers you scrounge off a machine can get a bend in pipe for you.
Supporting it thru the curve allows it to stop kinking which is what will
happen if you just pull it across a corner.
        Your absolutetly correct on curves and fittings changing the
velocity of a burner.  The striaght burners I made for my new gas forge had
such a high velocity that the flame had not completely burned before hitting
the floor of the forge and created hot spots.   I also had a chimney effect
happening so I used two 45 degree elbows to make a trap out of them and this
mixed the gas better, slowed the velocity of the burner down so the total
burn occured 1" off the floor resulting in no cold spots, and it was much
quieter..............but the 3/4 pipe no longer had enough heat
output..........so I went to 1" burner tubes and it is just what was needed.

Ralph


----- Original Message -----
From: "Marc Godbout" <[email protected]>
To: "TheForge" <[email protected]>
Sent: Tuesday, September 10, 2002 7:42 PM
Subject: [TheForge] Propane Forge - Bending the burner


> I've seen several commercial propane forges that save space by shaping
> the burner tube in a U-turn. These burners are also venturi-type, no
> blower and it looks like they use regular pipe fittings to do this, not
> some special cast burner tube.
>
> I was trying to do something similar with my side-arm, but just bending
> at a right angle, using iron fittings. But this noticeably reduced the
> output. I also tried 2 45deg fittings and that was just as bad.
>
> When the 45's were on it seemed like the fittings were getting hotter
> than a normal burner pipe would. I'm thinking that the flame might have
> been caught up in the fitting. Any ideas on how I could get a 90deg bend
> with a home-brew?
>
> Thanks.
>
> --
> Marc Godbout
> http://www.ironringforge.com
>
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