Haldia Refinery was commissioned in January 1975. It is situated 136 km downstream of Kolkata in the district of Purba Medinipur, West Bengal, near the confluence of river Hooghly and Haldi.

Petroleum products from this refinery are supplied mainly to eastern India through two product pipelines, namely Haldia-Mourigram-Rajband Pipeline (HMRBPL), and Haldia-Barauni-Kanpur Pipeline (HBKPL), as well as through barges, Tankers, tank wagons and tank trucks. Products like SRN, MS, HSD, FO and Bitumen are exported from this refinery. Products from Haldia Refinery are dispatched in all modes (Rail, Road, Pipeline and Coastal).

Spread over an area of 500 acres, Haldia Refinery consists of four blocks of process units called the Fuel Oil Block, the Lube Oil Block, the OHCU Block and the DHDS Block. The Oil Movement & Storage (OM&S) and Utility sections cater to the storage and movement of crude oil and products along with provision of generating and distributing steam, power, air and other utilities.