Hydrotreater	Distillation Column	Vaccum Distillation	Sulfur Recovery Unit
Hydrocracker	Coker Unit	Crude Distillation	Polypropylene Unit (etc.)

Bharat Petroleum Corporation

Hindustan Petroleum

Indian Oil Corporation

Oil & Natural Gas Corporation

Gas Authority of India

Reliance Industries

Nayara Energy

Cairn Energy

Oil India

North Refineries Co