STP&I Public Company Limited, established in Bangkok, Thailand, in 1975, operates as a diversified industrial entity. The company's core business involves the fabrication of steel structures, manufacturing, and selling boilers and pressure vessels, with its reach extending throughout Thailand, Japan, Spain, England, and other global regions. Their extensive steel structure portfolio encompasses significant projects for various sectors. This includes providing essential components for infrastructure such as airports, exhibition centers, and multi-story commercial buildings. For industrial clients, STP&I designs and constructs facilities for factories, automotive production plants, and steel mills. In the energy sector, they supply crucial elements like boiler frames, turbine buildings, and equipment support structures for power generation plants. The petrochemical industry also benefits from their expertise in refineries, gas separation plants, and aromatic processing facilities. Furthermore, the company specializes in constructing diverse bridge types, including main structural components, decking for cable-stayed bridges, flyovers, pipe bridges, and jetties, complete with built-in cable anchor structural decks. Beyond large-scale fabrication, STP&I delivers comprehensive piping pre-fabrication and on-site erection services for a wide array of industrial settings, including power plants, oil refineries, petrochemical complexes, and offshore processing units. They are also proficient in producing both offshore and onshore modular constructions. The company's engineering division offers specialized design services for steel-to-steel connections, alongside detailed shop and erection drawings. Their integrated fabrication process covers everything from cutting, rolling, and drilling to assembly, welding, rigorous inspection, surface treatment (blasting and painting), and final packing and delivery. Additionally, they undertake complete plant and module construction projects and provide crucial construction support services. STP&I has also significantly diversified its operations. This expansion includes the manufacturing, sale, and rental of construction machinery; generating and distributing electricity derived from waste materials; cultivating and distributing hemp-based products; providing municipal solid waste management solutions; engaging in property development; offering logistics services; leasing commercial properties like land, office spaces, and warehouses; and operating automated fuel stations for communities. The company, which was originally known as Sino-Thai Pressure Vessel & Iron Works, officially adopted its current name, STP&I Public Company Limited, in 1995.