Machine Sazi Arak
Machine Sazi Arak (MSA) is an Iranian manufacturing corporation that was established in 1967 in an area of 134 hectares in the city of Arak in order to support underlying industries and meet the industrial needs of the country. Activities and products. Some of the activities and products of MSA are as follows: Engineering, procurement, construction, installation of oil, gas, petrochemical, chemical factories, automotive and metal industries and power plant equipment including storage tanks, mobile and fixed pressure vessels, fractionating columns, heat exchangers, air coolers, spherical tanks, indirect heat exchangers, mobile oil treating (MOT) units, gate valves  and well-head equipment, drilling rigs, process pumps for oil and gas industry, cranes and hydro mechanical equipment for dams, fire tube and water tube boilers as well as combination cycles boilers, bridges and heavy steel structures, production of alloy steels, pressure flanges, industrial rings, axle and railways tires, steel balls, heavy machining industrial furnaces as well as manufacturing machines and plant equipment and industrial incinerators. With very rapid technological growth of MSA during these years, two reorganizations were performed to manage a wide and varied range of activities.