OIL & GAS

Corona EnergyCPL Energy India Pvt. Ltd.Gail (India) Ltd
HPCL – Mittal Energy Ltd.Nayara Energy LimitedONGC

PETROCHEMICALS

BC. Petro ChemBengal Cracker Complex LimitedBrahmaputra Cracker & Polymer Ltd
Chemical & Petrochemical IndustriesDaxesh Petrochem Pvt LtdHaldia Petrochemicals Ltd.
National Petrochemical Ltd.Raghav Polymers India Pvt. Ltd 

REFINERIES / NUCLEAR POWER PLANTS

Costal Gujarat Power Ltd CPL Energy India Pvt. Ltd. Genting Lanco Power (India) Private Limited
GSPC Pipavav Power Company Limited Indian Oil Corporation Limited Neptunus Power Plant Services Pvt Ltd
Nuclear Power Corporation of India Ltd