Acetylene gas is used wide range of industries because of its fuel efficiency. It is extensively used in Oxy-acetylene gas cutting, flame cutting and welding. Steel or metal industries have on-site acetylene gas plants for generating their own gas. These industries have heavy requirement of acetylene gas and so they cannot rely on vagaries of acetylene cylinder supplies. Acetylene gas is known for excellent heating with minimum thermal waste. Moreover, oxygen needs minimum oxygen for its combustion, which increases its usefulness. Acetone is used with the fuel for stopping decomposition.
Acetylene is very effective running for heating processes as it has low flame content and is also safe for underground work as it lighter than air. It is the only gas used in the welding of steel.