[TheForge] Natural gas burner?

[Rick Korinek]

The energy content of each fuel is: 

natural gas  1000 btu per cubic foot (approximately, and at STP)
propane	 2,500 btu per cubic foot

Assuming you will use the same pressure, the cross-sectional size of the
orifice needs to be 2.5 times as big.  Note that does not mean doubling the
diameter of the hole.  Area = Pi r*r.

You will also need to decrease the combustion air by about half.  The amount
of air to burn 1 cubic foot of NG is 10, for propane it is 24 cubic feet.

Sound right to you, Mike Porter?

-Rick

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Jerry Frost
Sent: Saturday, April 22, 2006 6:15 PM
To: Sponsored by ABANA
Subject: Re: [TheForge] Natural gas burner?

You'll need a larger orifice in the jet and a regulator. You'll need to 
tinker with the orifice size but it'll work just fine.

Frosty
-------------------------------
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it ain't real.
Wrought iron is.
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http://www.artmetalradio.com/

From: "G. Watts" <ironworker at cox.net>


>  Hey gang, this one's mostly for Mikey, but anyone's welcome to chime 
> in...
> I recently scored a unit on ebay that will compress natual gas from the
> house line into cylinders at about 275 psi.(item number 7605197382 which I
> think is still available for perusal if you search for the  number on 
> ebay).
> I've tried it out with a Victor torch with the correct tips and it works
> well for cutting.
>  I've heard questions asked and answered before relating to natural gas as
> a viable gas forge fuel, but never under the premise that the natural gas
> would be available under higher pressure.  So...what modifications would 
> you
> suggest to switch my propane forge over to natural gas?  Larger fuel
> orifice?  BTW - it's a homemade sidearm burner.  And if the conversion or
> different burner style is covered in the book, by all means say so and 
> I'll
> gladly order it!
> Thanks all.
> George.
>

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