[TheForge] converting to natural gas

[Kevin Gallagher]

Frosty,

Sorry not to give credit where credit is due.  The burner is great and to be the first gas forge I ever built, I am very happy with it.  And I have impressed others that thought gas burners had to have blowers.  Thanks for the info.
 
> From: akfrosty at mtaonline.net
> To: theforge at mailman.qth.net
> Date: Fri, 15 May 2009 16:01:15 -0800
> Subject: Re: [TheForge] converting to natural gas
> 
> The sidearm isn't Ron's design. Originally it was 
> Robert Grauman's take on a verbal description of my "T" 
> burner. That isn't important, it's just FYI.
> 
> Don't let the difference in BTUs per cu/ft or gallon or 
> whatever bother you, natural gas requires a lot less 
> air so there's less nitrogen to heat. Overall it works 
> very well.
> 
> The air:propane ratio for a neutral burn is 17.5:1
> 
> The air:nat gas ratio for a neutral burn is 10:1
> 
> So, try starting with a 0.040 or 0.045" mig tip and see 
> how it works. If you can't get a tip off the shelf that 
> tunes properly use torch tip cleaning files to enlarge 
> the orifice a little at a time.
> 
> If all else fails gun burners are easy to make and 
> tune.
> 
> You're lucky to have enough pressure available to run a 
> naturally aspirated burner.
> 
> Frosty
> -------------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
> 
> Meadow Lakes, AK.
> 
> 
> From: "Kevin Gallagher" <anvil1999 at hotmail.com>
> 
> 
> 
> I have been running a propane forge based on Ron Reil's 
> sidearm burner for several years now and it does a 
> great job. However, I just moved into a new shop which 
> has a natural gas line in it. Switching from bottle 
> propane to shop gas would be very convenient but I have 
> some questions and concerns. I usually run the burners 
> on propane at 5psi, the natural gas at the shop is 
> 12psi. I know natural gas burns cooler than propane 
> but given the increase in psi, do I need to increase 
> the orifice in the burner? (Currently it is a .035 mig 
> tip.) Most importantly, will a naturally aspirated 
> burner ever get hot enough on natural gas at 12psi to 
> forge weld? If so, how do I need to modify my burners? 
> Thanks
> 
> 
> 
> Kevin
> 
> www.muddyanvil.com
> 
> 
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