[TheForge] Re: RE: Petrogen Torch Yak
Peter Fels And Phoebe Palmer
artgawk at thegrid.net
Tue Aug 17 23:21:29 EDT 2004
Those sound nifty...where do you get them Dave?
David E. Smucker wrote:
>Ray,
>
>Have you ever seen or used "burning bars" for demolition work. The are a
>thin steel tube packed with steel wire. The small size is about 3/8 dia and
>3 feet long and the large size go up to about 1 inch diameter and 20 feet
>long. They have a crimp on one end so the wire doesn't fall out. The tube
>is connected to just oxygen -- no fuel gas at all. While they are pack with
>wire there is enough space between the wires for oxygen to flow. You
>"start" them with a regular torch -- just bring the end up to a hot yellow
>heat -- then turn on the oxygen. The tube and wire are consumed in the
>process and generate a great deal of heat while excess oxygen is supplied
>like a oxygen lance. They will blow through lots of things cutting steel,
>rebar and concrete. They are not for the faint of heart. Oh, and the
>quality of the cut is not very good.
>
>Dave Smucker
>----- Original Message -----
>From: <debmiller at fuse.net>
>To: "Sponsored by ABANA" <theforge at mailman.qth.net>
>Sent: Tuesday, August 17, 2004 7:47 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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>_______________________________________________
>Manage membership or unsubscribe at:
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