Manufacture of gas

Manufacture of gas
This class includes:
- production of gas for the purpose of gas supply by carbonation of coal, from by-products of agriculture or from waste
- manufacture of gaseous fuels with a specified calorific value, by purification, blending and other processes from gases of various types including natural gas
Transformation of pipeline natural gas into compressed natural gas (CNG) off mine site
This class excludes:
- production of crude natural gas, see 06.20
- operation of coke ovens, see 19.10
- manufacture of refined petroleum products, see 19.20
- manufacture of industrial gases, see 20.11