STP&I Public Company Limited is a Thailand-based company engaged in steel fabrication work and the manufacture of boilers and pressure vessels. The Company and its subsidiaries operate two business segments, which are fabrication work for construction and industrial purposes, and sale of construction machines, services of machinery and maintenance. Its products include steel structures, piping fabrication, process modules and other fabrication steels, such as tanks, pressures, vessel boilers and others. It provides steel structures for heavy industries, such as power plants, refineries, high-rise buildings, roof structures, bridges, elevated highways and airports. The Company also provides engineering services in detailed design of steel-to-steel connection. It owns and operates production facilities in Chonburi and Rayong provinces. Its subsidiaries include STIT Company Limited and STP&I Services (STPS) Company Limited.