STP & I Public Company Limited was established in 1975, where for over 30 years, the Company has provided customers with professional manufacturing of customised quality steel fabrication.

One of STP&I’s strengths is its capability to fabricate large built-up beam steel for huge infrastructure and heavy industry projects such as power plants, high-rise buildings, roof structure, bridges, elevated highways, and airports.

STP&I owns and operates two production plants in Chonburi and Rayong provinces with a total steel fabrication capacity over 50,000 ton / year. In 2008 STP&I expand capacity by building new facilities investment at Sriracha Fabrication with an additional capacity of 25,000 ton / year.

STP & I Public Company Limited established a subsidiary company, namely STIT Co., Ltd. The table below provides general information for these 2 business entities.

Core Business of STP&I can be categorised into three key groups:

  1. Steel Structure Fabrication
    1. Steel structures for heavy industrial such as power plant, refinery, and petrochemical plant, etc.
    2. Steel Structure for building, high – rise building.
    3. Steel Structure for infrastructure system such as bridge, highway, airport, etc.
    4. steel structures for construction equipment and mechanical parts and general steel works such as structure, transmission line tower, etc.

  2. Piping Fabrication: STP&I has an outstanding expertise in piping fabrication which includes piping pre-fabrication, piping erection, and pipeline constructions. The spoon fabrication is carried out in STP&I’s facilities, then the completed products are transported to the project sites for installation. These pipes are essential parts in the production process of industrial plants such as power plants, oil refineries, petrochemical plants, offshore process plants, etc.

  3. Process Module: STP&I designs, supplies, and fabricates a variety of pressure vessels for petrochemical processing plants and power plants industries. The pressure vessel work includes drum, reactor, columns, splitter towers, stream drums, and separators under ASME standards. STP&I also designs spherical tanks and large diameter storage tanks under various standards. These tanks are used for storing liquids or gas in refineries, and for production process in power plants and petrochemical plants.

STP&I’s secondary core business is:

Construction Equipment Sales and Services: STP&I has established another branch in 2006 to support the rapid future expansion of the construction industry. This new branch serves to produce, sell and/or rent construction equipments and materials, provide managerial and purchasing support to its customers. Additionally, STP&I renders project management services to its subsidiaries and affiliated companies while charging managerial fees in return.