[TheForge] Re: RE: Petrogen Torch Yak

Thu Aug 19 21:28:06 EDT 2004

Cutting a hole in the wall or floor of the shop?
A really big sparkler!

  A friend of mine was a diver and used to use something like these to burn 
metal parts away under water

L Brown

At 11:43 AM 8/19/2004 -0400, you wrote:
>Hello,
>
>I know I'm way late on this thread but  I was just curious, what would 
>anyone working a small( pick a size) smithy, fab shop, possibly use an air 
>lance for?
>
>Regards,
>Bill Woolley
>
>
>
>debmiller at fuse.net wrote:
>
>>The petrogen is only for cutting. The one of the other emails in this 
>>thread listed another version that could cut and weld.
>>
>>Ray Miller
>>Cincinnati
>>
>>
>>>From: "Rafter Lazy C" <rick at rafterlazyc.com>
>>>Date: 2004/08/19 Thu AM 07:51:58 EDT
>>>To: "Sponsored by ABANA" <theforge at mailman.qth.net>
>>>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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>>
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>
>_______________________________________________
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