[TheForge] Re: RE: Petrogen Torch Yak

[debmiller at fuse.net]

My understanding of the petrogen torch is that it was developed for the Department of Energy for use in the dismantling of nuclear weapons sites, like Fernald, etc. I have not personally used one but had previously reviewed their performance for possible purchase by GE for use in large scale demolition projects. We were taking down 50 plus year old building with thick steel plate shielding, 3 foot thick concrete walls that were almost solid rebar, etc.

The cutting speeds are incredible, fuel costs are(were) cheap and the cutting capacity is unbelievable. I will see if I can dig up the DOE site that had a pdf file of an extensive study performed comparing the petrogen to acetylene. 

As far as safety, gasoline is not flammable, only the vapors. So the unit keeps the fuel in liquid form all the way up to the mixing chamber in the torch head. Then it is vaporized and mixed with O2 and baby does it burn. Gasoline is 125,000 BTU/gallon!!!!

That's a ton of heat!!

Ray Miller
Cincinnati
> 
> From: "Michael H. Murphy" <blacksmith at comcast.net>
> Date: 2004/08/16 Mon PM 06:00:05 EDT
> To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
> Subject: RE: [TheForge] allstate oxy-propane torch
> 
> After reading through this whole thread (and getting some good info out of
> it), I figured this one would really get everyone going.  N.B. I've never
> tried it, nor talked to anyone who has, so I'm not claiming anything.
> 
> http://www.petrogen.com/
> 
> Murf
> 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net [mailto:theforge-
> > bounces at mailman.qth.net] On Behalf Of Bruce Freeman
> > Sent: Monday, August 16, 2004 3:35 PM
> > To: theforge at mailman.qth.net
> > Subject: Re: [TheForge] allstate oxy-propane torch
> > 
> > I went to the site and found the table.  I did not find any explanation
> > of what they MEAN by oxygen to fuel gas ratio.  As I and others have
> > pointed out, it certainly is not the stoichiometry of the respective
> > reactions.  It may be "correct", but we have to know what it means to
> > judge that.
> > 
> > Bruce
> > NJ
> > 
> > >>> "terry l. ridder" <terrylr at blauedonau.com> 8/16/2004 3:16:48 AM
> > >>>
> > hello;
> > 
> > no the table is correct:
> > reference for the table are:
> > 
> > twi world centre for materials joining technology
> > oxyfuel cutting - process and fuel gases
> > http://www.twi.co.uk/j32k/protected/band_3/jk49.html
> > 
> > the usa affiliate is edison welding institute at www.ewi.org
> > 
> > college chemistry book
> > 
> > every one   carbon  atom needs 2 oxygen atoms to form CO2.
> > every two hydrogen atoms  need 1 oxygen  atom to form H2O.
> > 
> > propane == C3H8
> > oxygen  == O2
> > 
> > C3H8(g) + (5)O2(g) == (3)CO2(g) + (4)H20(g)
> > 
> > the above equation is balanced.
> > 
> > acetylene == C2H2
> > oxygen    == O2
> > 
> > C2H2(g) + (2.5)O2(g) = (2)CO2(g) + H2O(g)
> > 
> > the above equation is balanced.
> > 
> > propylene == C3H6
> > oxygen    == O2
> > 
> > C3H6(g) + (4.5)O2(g) = (3)CO2(g) + (3)H2O(g)
> > 
> > the above equation is balanced.
> > 
> > On Sun, 15 Aug 2004, James Binnion wrote:
> > 
> > james> Terry your chart is wrong or has a typo.
> > james>
> > james> Acetylene:
> > james> Theoretical Oxygen Ratio,  by  volume 2.5 : 1
> > james> Torch Oxygen Ratio, by Volume 1.1 : 1
> > james>
> > james> Propane:
> > james> Theoretical Oxygen Ratio,  by  volume 5 .0: 1
> > james> Torch Oxygen Ratio, by Volume  3.5 : 1
> > james>
> > james> Source for Torch Oxygen Ratio, by Volume
> > james> Oxygen Cutting; Meyer; Green et. al.; Welding Handbook, Vol. 2,
> > 8th
> > james> ed., pg. 454,  American Welding Society
> > james>
> > 
> > --
> > terry l. ridder ><>
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