STP&I Public Company Limited (STPI) is a Thailand-based company established in 1975. It specializes in steel fabrication, as well as the manufacture and sale of boilers and pressure vessels. With over 50 years of experience, STPI focuses on producing customized steel products for infrastructure and heavy industry projects.
The company has a steel fabrication capacity of 50,000 tons per year and is recognized as one of Thailand's largest piping fabricators. STP&I is publicly listed on the Stock Exchange of Thailand (SET). Its key offerings include general steel works, large built-up beams for major projects like power plants, and high-capacity piping fabrication.