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Bongaigaon Refinery & Petrochemicals Limited (BRPL) was incorporated in 1974 as a Government Company. Situated amidst spectacular green surroundings in the Chirang district of Assam, it is about 200 km west of the state capital Guwahati. Amalgamation of Bongaigaon Refinery & Petrochemicals Limited (BRPL) with Indian Oil Corporation happened in 2009 and the refinery today is part of Indian Oil Corporation and is known as Bongaigaon Refinery.

The first CDU with a capacity of 1.0 MMTPA was commissioned in 1979. The configuration of the refinery expanded with the addition of a DCU in 1981 and a CRU in 1985. The refinery capacity was de-bottlenecked to 1.35 MMTPA in 1986. Moreover, during 1995-96, the Refinery Expansion Project was commissioned with the addition of a CDU and a DCU, and with this, the overall capacity was increased to 2.35 MMTPA. Subsequently to meet environmental norms as mandated by Auto Fuel Policy, MSQU Unit, DHDT/HGU, and SRU were added in 2010, 2011, and 2012 respectively.

To meet the BS-VI specifications some more process units were added during 2020-22 under the ‘BS-VI Projects’ comprising a new Naphtha Hydrotreater, a new SRU, new ARU, Prime-G+ and revamp projects of DHDT and HGU. INDMAX project was commissioned in 2020 along with an increase in crude processing from 2.35 to 2.7 MMTPA.

Refinery Expansion Plans: Refinery capacity expansion to 5 MMTPA is under conceptualization.

Major products: Liquified Petroleum Gas (LPG), High Speed Diesel(HSD), Motor spirit(MS), Ethanol Blended Motor Spirit (EBMS), Superior Kerosene Oil(SKO), Aviation turbine fuel(ATF), Light Diesel Oil(LDO), Sulphur, Raw Pet Coke(RPC), Carbon Black Feed Stock(CBFS)

• Mode of Product Dispatch
• Guwahati - Siliguri Pipeline (GSPL) for MS, SKO, HSD.
• Railway Wagon (Single spur rake loading gantry for SK, MS, HSD, Naphtha, LDO, RPC).
• Tanker Trucks loading for MS, SKO, HSD