STI/SPFA Membership Applications

How to Join STI/SPFA

STI Licensed Shop-Fabricated Tank Membership

The Steel Tank Institute has been the leader in developing storage tank technologies for decades. Our tank standards and specifications are cited in regulation throughout the United States and in demand by customers worldwide. View descriptions of our licensed technologies.

If you want the business advantages of STI’s proven tank technologies, join our STI Shop Fabricated Atmospheric Tank membership section.

STI Licensed Shop-Fabricated Tank Membership Application

Field Erected, Pressure Vessel, Water Pipe and Special Fabrication Membership

The same benefits and value are yours, no matter what steel fabrication product you manufacture. Education, advocacy, marketing and more–all are provided to STI/SPFA members.

Field Erected, Pressure Vessel, Water Pipe and Special Fabrication Membership Application

Affiliate Membership

Suppliers of products and services to the steel fabrication industry play an important role in STI/SPFA. Support your customers and your industry as an Affiliate Member.

Affiliate Membership Application

Industry Associate Status

Not a manufacturer or a supplier, but need to keep up with the latest in the steel fab industry? We have a special status category for individuals such as regulators, architects, consultants, inspectors and engineers.

Industry Associate Status Application

Questions? Call 847-438-8265 or email us for more information.

Featured Affiliate


K-TIG is an advanced GTAW technology that reduces multi-hour welds to just minutes whilst retaining the sort after high quality of conventional TIG processes. In addition to speed advantages the K-TIG technology significantly reduces power, gas consumption and labour costs.
“Networking at STI/SPFA meetings has given us new ideas to manufacture our products more efficiently.”

Sonny Underwood
Mid-South Steel Products, Inc.