The STI/SPFA is a not-for-profit trade association representing the steel fabrication industry.

Since 1916, the Steel Tank Institute has been a creator of cutting-edge storage tank technology, consulting with government and third-party agencies to advocate for the highest standards. In 2004, the Steel Plate Fabricators Association joined with STI to increase the industry’s strength and impact for fabricators of field erected water storage tanks, steel water pipe, pressure vessels, and specialty steel products.

STI/SPFA is now identified by federal and state government, the broader steel industry, third-party agencies, and consumers as the organization best representing the steel fabrication industry. We are recognized for our leading tank technologies, storied history, active advocacy, and prominent activities and programs.


STI/SPFA will be the champion of steel storage tanks, pipe, pressure vessels, and other steel plate fabricated products.

STI/SPFA Mission

STI/SPFA will promote and unite the steel plate fabricated products industry through standards development, education and communication.


Our members are fabricators of steel shop-fabricated storage tanks, field erected water storage tanks, water pipe and pipelines, pressure vessels and heat exchangers, and specialty fabricated products. Their customers are from the petrochemical, power generation, food, pharmaceutical, fuels, wastewater and water transmission industries.

Join today to support your company, and your industry. Learn more or call 847-438-8265 or email us for more information.

STI Tank Technologies

STI/SPFA develops, licenses and updates shop fabricated tank technologies.

Technologies include essential features such as corrosion prevention, secondary containment, monitoring capability, and fire protection. Licensing of technologies, a mandatory quality assurance inspection program and annual educational seminars, as well as certification programs for AST Tank Inspectors and Cathodic Protection Testers are available. Many industry-specific standards have been developed, as well as technical papers, design software and spreadsheets.

Learn more about STI Tank Technologies

Members and More

“Without STI/SPFA membership, we probably wouldn’t be in the position we are today.”

Jon Ward
Ward Tank & Heat Exchanger

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