Indian Oil Corporation Limited

www.iocl.com

Bharat Petroleum Corporation Limited

www.bharatpetroleum.com

Hindustan Petroleum Corporation Limited

www.hindustanpetroleum.com

Tamilnadu Petroproducts Limited

www.tnpetro.com

Oil and Natural Gas Corporation Limited

www.ongcindia.com

Toyo Engineering India Limited

www.toyoindia.com

ACC Babcock Limited

www.acclimited.com

Essar Oil Limited

www.essar.com/

Larsen & Toubro

www.larsentoubro.com

CITGO Petroleum Corporation

www.citgo.com

Duncans Industries Limited

www.duncans-tea.com

Lurgi GmbH

www.lurgi.com

Hitachi

www.hitachi.co.in

Nirma Limited

www.nirma.co.in

Uhde India Limited

www.uhdeindia.com

Petron Engineering Construction Limited

www.petronengineering.com

Foster Wheeler

www.fosterwheelerindia.com

Gasco PTY Ltd.

www.gasco.net.au

OnQuest, Inc.

www.onquest.com

Tata Projects Limited

www.tataprojects.com

Samsung Engineering India Private Ltd.

www.samsungengineering.com

Punj Lloyd Ltd.

www.punjlloyd.com

Haldia Petrochemicals Limited

www.haldiapetrochemicals.com

Bharat Oman Refineries Limited

www.borl.in

HPCL-Mittal Energy Limited

www.hmel.in