[TheForge] burners

[CGRAF]

On 12/30/2011 2:02 PM, Bob wrote:
>       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
>
>

  I may have that in from the street, but the regulator at the meter 
cuts me down to between 6.5 and 7 inches of water column.

That being said I have a natural gas forge that I use for heating bulk 
items to forging temps. I did succeed in melting a steel bar once, so I 
suppose that I can get welding temps. Mostly I just fire up the coal 
forge if I am going to weld, or light up the torch.

My NG Burner looking from left to right.
  1. A large tee "2" inch air from blower  piped into the side so that 
air can flow both ways. The left hand side has a short nipple with a 
spill gate that is easily adjustable.
2. To the right is a short nipple and another tee with a 1/8th inch gas 
pipe mounted with a bushing piped into the side. Gas/air mixture flows 
to the right and into side of the forge near the rear.
3. Forge  3 inches of kaowool and a 12 inch pipe closeable on either 
end. Usually the rear is blocked off.
4.Gas is at about 5 inches of water column is supplied through a 
regulator and two hand shut offs. One shutoff near the forge for 
operating it and another across the room, just in case.
5. Air is supplied from a remote furnace vent fan salvaged from a job 
site. It can supply way more than I need.

  This is primitive and entirely devoid of any safety features, but it 
works.
I run it only with the big door up and shop ventilation on. CO detector 
is a must.

  All that being said, by metering the gas and air supplies I can get 
pretty much any size flame that I need and anywhere from oxidizing to 
reducing atmospheres in the forge.

Mike Graf