[TheForge] Re: RE: Petrogen Torch Yak
Ralph Sproul
brhlbsmt at mcttelecom.com
Fri Aug 20 08:31:03 EDT 2004
Hi Murf, I watched one of the demos of that Petrogen torch at a county
fair one year.......there was such an intense pre heat to this torch, that
the demonstrator was able to start the cut in seven pieces of 1/2" steel
stacked up straight! ........then go on right thru the staked pile. I'll
bet you'd be hard pressed to cut this heat back to not really have a time of
it to do light gas welding. I could see that being awesome for scraping
parts all laminated together.
I'll be it would be awesome for gas welding of heavy material though -
if there is a welding tip available. The torch I saw had just a cutting
head on it..........it was not a combination torch.
Ralph
----- Original Message -----
From: "Michael H. Murphy" <blacksmith at comcast.net>
To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
Sent: Thursday, August 19, 2004 7:51 PM
Subject: RE: [TheForge] Re: RE: Petrogen Torch Yak
> The Petrogen folks say theirs will not weld, but Opetro, out of China,
says
> theirs will. I've not tried either, but I tend to be a bit dubious about
> some of this Chinese equipment.
>
> Murf
>
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net [mailto:theforge-
> > bounces at mailman.qth.net] On Behalf Of Rafter Lazy C
> > Sent: Thursday, August 19, 2004 6:52 AM
> > To: Sponsored by ABANA
> > Subject: Re: [TheForge] Re: RE: Petrogen Torch Yak
> >
> > Hello guys -
> >
> > I was wondering whether these gasoline torches would be able to gas
> > weld
> > the same as an oxy-acetylene? Does anyone have knowledge of this? I
have
> > been thinking about replacing my old torch and the gasoline doesn't
sound
> > bad, but I need to be able to weld with my torch also.
> >
> > Rick Crawford at Rafter Lazy C
> > Home of Smoky Forge and Lem the Wonder Mule
> >
> > ----- Original Message -----
> > From: <debmiller at fuse.net>
> > To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> > Sent: Tuesday, August 17, 2004 6:47 AM
> > Subject: [TheForge] Re: RE: Petrogen Torch Yak
> >
> >
> > > 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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