Welding Journal

Oxyacetylene cutting (OFC-A) was one of the first successful cutting processes that used a flame produced by the chemical combustion of acetylene and oxygen. 

Acetylene is a compound containing carbon and hydrogen. It is slightly lighter than air and unstable at pressures of more than 15 lb/in.2 (100 kPa). All acetylene regulators show a maximum of 15 lb/in.² on the working pressure gauge. At more than 15 lb/in.², the scale of the gauge is red as a safety indicator. 

Oxyg..