Manufacture of industrial gases

20.11
Manufacture of industrial gases
This class includes:
- manufacture of liquefied or compressed inorganic industrial or medical gases:
  • elemental gases
  • liquid or compressed air
  • refrigerant gases
  • mixed industrial gases
  • inert gases such as carbon dioxide
  • isolating gases
Mixing of gases
This class excludes:
- extraction of methane, ethane, butane or propane, see 06.20
- manufacture of fuel gases such as ethane, butane or propane in a petroleum refinery, see 19.20
- manufacture of gaseous fuels from coal, waste etc., see 35.21