Manufacture of industrial gases

Title: Manufacturing of industrial gases Includes the manufacture of inorganic industrial or medicinal gases, tablets, liquefied or solidified, such as: elementary gases (oxygen, nitrogen, rare gases and hydrogen, except for energy supply through the supply network); liquid air or tablet; industrial gas mixtures; insulating gases; carbon dioxide (including production of carbon dioxide). Does not include:  Extraction of methane, ethane, butane or propane (06200);  Manufacture of butane and other refinery gases (19201);  Manufacture of refrigerant gases (20144);  Manufacture of gaseous fuels from coal, waste, etc. (35210);  Manufacture of hydrogen for supply as gaseous fuel through a gas network permanent supply (35210);