[TheForge] Volume of a #4 acetylene cylinder?

[Keporter at aol.com]

In a message dated 7/5/2005 3:14:30 P.M. Pacific Standard Time,  
craig.schaefer at verizon.net writes:

Why  aren't folks using propylene for steel welding?   Does it require a  new 
set of tips or can acetylene tips be used in  torches?



Propylene has more free carbon than any other fuel gas, but acetylene.  
Unfortunately, even propylene simply does not have the amount of free carbon  
available in acetylene, without which, you are not going to make satisfactory  
oxy-fuel welds on steel.