if you are use to acctylene try backing your torch up a little bit
the fuel is used for the heating your cutting with the oxygen.
BTU's of Acetylene is approximately 1470 btu's per cubic foot.
BTU's of Propane is approximately 2498 btu's per cubic foot.
go to this page http://www.cousesteel.com/AndysPlace...Acetylene.html their is a word of info there
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