2911  Petroleum Refining

Establishments primarily engaged in producing gasoline, kerosene,
distillate fuel oils, residual fuel oils, and lubricants, through
fractionation or straight distillation of crude oil, redistillation of
unfinished petroleum derivatives, cracking or other processes.
Establishments of this industry also produce aliphatic and aromatic
chemicals as byproducts. Establishments primarily engaged in producing
natural gasoline from natural gas are classified in mining industries.
Those manufacturing lubricating oils and greases by blending and
compounding purchased materials are included in industry 2992.
Establishments primarily re-refining used lubricating oils are classified
in industry 2992. Establishments primarily engaged in manufacturing cyclic
and acyclic organic chemicals are classified in major group 28.