Barauni Refinery in the Bihar state of India was built in collaboration with the Soviet Union at a cost of Rs.49.4 crores and went on stream in July, 1964. The initial capacity of 2 MMTPA was expanded to 3 MMTPA by 1969. The present capacity of this refinery is 6.00 MMTPA. A Catalytic Reformer Unit (CRU) was also added to the refinery in 1997 for production of unleaded motor spirit. Projects are also planned for meeting future fuel quality requirements.
In 1997 the refinery was reported to be the target of Assamese rebels.