[TheForge] allstate oxy-propane torch

[terry l. ridder]

hello;

i have looked at the allstate oxy-propane torch and talked with many
welders who visit my friend, paul's, welding shop. we all have the same
question which allstate has yet to answer.

how can allstate make the claim that oxygen comsumption will be less
when using propane than when using acetylene when the chemistry of the
gases clearly state otherwise?

based on the table:

               Table : Fuel Gas Characteristics
Fuel Gas    Maximum Flame  Oxygen to fuel gas Heat distribution
            Temperature °C Ratio (vol)        kJ/m3
                                              Primary    Secondary
Acetylene   3,160          1:5                18,890     35,882
Propane     2,810          4.3:1              10,433     85,325
MAPP        2,927          3.3:1              15,445     56,431
Propylene   2,872          3.7:1              16,000     72,000
Hydrogen    2,834          0.42:1             -          -
Natural Gas 2,770          1.8:1              1,490      35,770

as the above chart shows, oxygen use is going to increase 21.5 times when
using propane instead of acetylene. ( andy corrected my math error. )

to burn 5 cf of acetylene requires  1.0 cf of oxygen
to burn 5 cf of   propane requires 21.5 cf of oxygen

no torch design is going to change that.

has anyone gotten a good answer from allstate on this question yet?

-- 
terry l. ridder ><>