[TheForge] allstate oxy-propane torch

[Michael H. Murphy]

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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