OKA Engineering & Construction has been established as OKA Engineering Systems for Energy Generation Ltd. to serve complete turnkey capability of the design, fabrication and installation of heat recovery systems for gas turbine exhaust, diesel engine exhaust, chemical processes and process gas streams; municipal solid waste incineration systems and also economisers in 1997 at Ankara Turkey. Within 20 years followed by the foundation of OKA has successfully realized important construction commitment works and turnkey projects such as motorways, subway tunnels, power plants, industrial structures... OKA also offers project preliminary planning, project management, erection, commissioning and consultancy for your systems with its members' experience in the subject field. Engineering capabilities include mechanical and structural design, heat transfer, instrumentation and controls, fluid dynamics, structural and civil with computerized systems to provide efficient and accurate design and complete solutions for boiler and energy applications. OKA takes into consideration optimum pressure drops for gas and water/steam sides, fuel input evaluation, optimum exit gas temperatures, economiser steaming evaluation, fin configuration/ arrangement, variations in steam demand, flow induced vibration, erosion from gas entrained particulate, slagging, high and low temperature corrosion, fouling and steam purities in engineering and design of the boilers to provide customer's demand and cost effective applications. The main objective of OKA is to accomplish all of its businesses in accordance with certificates of Quality, Environment and Occupational Health and Safety and also in accordance with international norms, to sustain Integral Management System with high quality understanding, to develop excellent quality, to create secure environment at work by providing guaranteed employment for its Turkish and foreign staff, to train conscious, sensitive and qualified personnel in the fields of safety at work, workers health, environmental effects, quality and planning areas.