Oil India Limited and Numaligarh Refinery Limited, signed a new long-term Definitive Agreement for the transportation of additional petroleum products through OIL's Numaligarh-Siliguri Product Pipeline (NSPL) following the commissioning of Numaligarh Refinery Expansion Project. The Agreement will be effective from the date of commencement of augmented pipeline operations for a period of 25 years. Currently, OIL evacuates 1.72 MMTPA of petroleum products through NSPL, delivering to the Marketing Terminal of NRL at Siliguri.

Since its commissioning in 2008-09, the NSPL has served as the lifeline for evacuating products from NRL's Refinery to Siliguri Marketing Terminal for onward distribution to various demand centres in eastern and northern India. In line with Hydrocarbon Vision 2030 for Northeast India, NRL is executing Numaligarh Refinery Expansion Project to enhance capacity from 3 to 9 MMTPA. To evacuate NRL's additional petroleum products through existing NSPL, OIL & NRL entered into an MOU in December 2020 under which, OIL agreed to invest for augmenting the capacity of the NSPL from 1.72 MMTPA to 5.50 MMTPA by way of establishing additional booster pump stations and other facilities at different pump stations along its right of way.