Oil and Natural Gas Corporation Ltd.
     Indian Oil Corporation Ltd.
     Hindustan Petroleum Corporation Ltd.
     Bharat Petroleum Corporation Ltd.
     Bongaigaon Refineries and Petrochemicals Ltd.
     National Organic Chemical Industries Ltd.
     State Govts.
     Gujarat State Petroleum Corporation
     Gujarat State Petronet Ltd.
     Gujarat Water Supply & Sewage Board
     Gujarat Water Infrastructure Ltd.
     Larsen and Toubro Ltd.
     Bharat Heavy Plates and Vessels Ltd.
     Punj Lloyd Ltd.  

     KazStroy Services Infrastructure India Pvt Ltd,

     Nafto Gaz Ltd
     Daelim (South Korea)
     Stork Engg. & Contractors (Holland)
     ICB/ Technimont (France)
     Kinetic Technology International (Italy)
     Powergen (U.K.)
     U.O.P. (Holland)
     Hyundai Heavy Industries (S. Korea)
     N.P.C.C. (Abu Dhabi)
     Cogan Oil & Gas Services (U.K.)
     Technip (Italy)
     Siirtec Nigi