3521 Manufacture of gas


Corresponding CPA codes

  • 35.21.1 Coal gas, water gas, producer gas and similar gases, other than petroleum gases
  • 35.21.10 Coal gas, water gas, producer gas and similar gases, other than petroleum gases

    This subcategory includes:

    • gas for the purpose of gas supply by carbonation of coal, from by-products of agriculture or from waste

    This subcategory excludes:

    • crude natural gas, see 06.20.10
    • refined petroleum products, see 19.20.3
    • industrial gases, see 20.11.1