[TheForge] allstate oxy-propane torch

[Bruce Freeman]

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 ><>
_______________________________________________
Manage membership or unsubscribe at:
http://mailman.qth.net/mailman/listinfo/theforge 
theforge mail list group photo site is
http://www.photoaccess.com 
Login:  blacksmithblacksmith at hotmail.com 
password:  anvil
___________