Guwahati Refinery (Assam)
Guwahati Refinery located among the picturesque surroundings near Brahmaputra River in Guwahati city
in North Eastern part of India, is the country’s 1 st Public Sector Refinery as well as IndianOil’s serving the
nation since 1962. Built with Rumanian technology available in the late 50s, the initial crude processing
capacity of the Refinery was 0.75 Million Metric Tonnes Per Annum (MMTPA). The Refinery was
designed to process a mix of OIL and ONGC crude along with Secondary processing units viz. Delayed
Coker Unit (DCU) of 0.33 MMTPA capacity and Kerosene Treating Unit (KTU) of 0.23 MMTPA
capacity. Subsequently capacity of the refinery was enhanced to 1.0 MMTPA in 1986.
INDMAX Unit, a technology developed by IndianOil R&D Centre for upgrading heavy ends to LPG,
gasoline and diesel was commissioned in June 2003.
The following units were added to meet the fuel specifications.
- To produce Euro-III quality MS Isomerisation Unit, Naphtha Hydrotreater Unit TMTPA,
Naphtha Splitter Unit, and Indmax Gasoline Unit were commissioned in 2010.
- INDAdept-G Unit (IOC - R&D Technology based on Adsorption) was commissioned in 2017 for
treatment of Heavy Gasoline from Indmax to comply to BS-IV MS norms
- To produce BS-VI/Euro-VI quality MS/HSD a New indeSelectG unit ((IOC - R&D Technology)
was commissioned along with revamp of existing HDT unit, Hydrogen unit and Isomerization
Unit.
Upcoming Projects: A New Semi regenerative CRU unit along with refinery expansion from 1 to 1.2
MMTPA has been approved and is expected to be completed in 2023.
Major products: LPG, Naphtha, MS, EBMS, HSD, SKO, ATF, LDO and Calcined / Green needle
coke.
Mode of Product Dispatch
1).Pipeline: GSPL (Guwahati-Siliguri Product Pipeline) for MS, SKO and HSD. The refinery
supplies petroleum products to North-Eastern India and Siliguri in West Bengal through GSPL.
2).Tanker trucks for LPG, Naphtha, EBMS and ATF.
