Methylacetylene-propadiene gas

Methylacetylene-propadiene (MPS) gas is a type of fuel gas used in oxy-fuel welding and cutting torches, comprising a mixture of several gases.

MPS gasesEdit

An MPS gas is a mixture of two or more of propane, butane, butadiene, methylacetylene (propyne, CH3C≡CH) and propadiene (CH2=C=CH2).[1] They are marketed under different names including: "MPS", "Chem-O-Lean", "Apachi Gas", "FG-2 Gas", "Flamex" and "natural gas".[1] The most commonly known type of MPS gas is the discontinued MAPP gas.[2]

As a fuel gas, it burns hotter than propylene, propane or natural gas.

See alsoEdit


  1. ^ a b Jeffus, Larry (January 23, 2020). "Welding: Principles and Applications". Cengage Learning. p. 172 – via Google Books.
  2. ^ Porter, Michael (2004). Gas Burners for Forges, Furnaces, and Kilns. City: SkipJack Press. ISBN 1-879535-20-3.