PT Heat Exchangers Indonesia is a wholly owned company of the KNM Group based in Batam, Indonesia. Established in 1994, HEI specializes in the design and manufacture of pressure vessels, shell & tube heat exchangers, process skid packages, piping systems and other specialized fabricated equipment for the oil and gas, petrochemical and general industries. Since its establishment, HEI has fabricated over 5,000 units of equipment for various customers in Indonesia, Singapore, Malaysia, the Middle East and Australia.