Petroleum refineries

This sub-class includes refining crude petroleum into refined petroleum products. Petroleum refining involves one or more of the following activities: - fractionation - straight distillation of crude oil - cracking It also includes the manufacture of liquid or gaseous fuels or other products from crude petroleum, bituminous minerals or their fractionation products. Units in this sub-class are primarily engaged in: - production of: - motor fuel: gasoline, kerosene, etc. - fuel: light, medium and/or heavy fuel oil, refinery gases such as ethane, propane, butane etc.