ACT-100® features a strong steel tank for structural integrity, and a 100‐mil outer coating for long‐lasting corrosion protection.

Shop Fabricated Tanks

Tank standards and specifications are cited in regulation throughout the United States and in demand by customers worldwide.

Shop Fabricated Tank Section

Steel Water Pipe

STI/SPFA members build steel water pipe that meets or exceeds the requirements of ASCE, AWWA, and SWPMTAC standards.

Steel Water Pipe Section

Field Erected Tanks

Members fabricate steel industrial and water tanks that meet or exceed the requirements of AWWA, NSF, API, and industry standards.

Field Erected Tank Section

Pressure Vessels

Member pressure vessels are used by the petrochemical, food, power generation, and hazardous material storage industries.

Pressure Vessel Section

STI Tank Technologies

STI/SPFA is recognized for our leading tank technologies with features such as corrosion prevention and fire protection.


The STI SP001 standard provides a means for aboveground storage tank owners to comply with EPA mandates.


Join the STI/SPFA to receive the latest industry news and information, network with peers, and strengthen your business.

Featured Affiliate

Commercial Metal Forming

Commercial Metal Forming is the nation’s leading manufacturer of tank heads and tank accessories. Contact us today to find out why we believe we are ahead of the curve.

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

Jon Ward
Ward Tank & Heat Exchanger

Representative Johnson Visits Maguire in Sioux Falls, South Dakota

Sioux Falls, SD November 30, 2023 – United States Representative Dusty Johnson (R – SD) visited STI/SPFA member Maguire at their Sioux Falls, South Dakota headquarters. While at Maguire, Congressman Johnson recorded a podcast on water infrastructure and water infrastructure funding. You can listen to the conversation on the Maguire

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Notes from 2023 API Fall Refining and Equipment Standards Meeting

STI/SPFA Standards Engineer, Joe Mentzer, had the opportunity to attend the API 2023 Fall Refining and Equipment Standards Meeting in Chicago. Below are notes of interest for STI/SPFA members. API 12D Specifications for Field Welded Tanks for Storage of Production Liquids The API 12D standard is being revised to show

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Safety Library

Access important safety topics affecting the steel fabrication industry including fall protection, confined space, welding, and more.

Tank Integrity Management

STI/SPFA’s Tank Integrity Management Course is designed to provide the knowledge you need and recognize your expertise.

STI/SPFA Product Awards

The STI/SPFA Product Awards recognize steel construction product achievements that exemplify the steel tank industry.

FLAMESHIELD® Aboveground Storage Tanks

2023 STI/SPFA Annual Business Meeting


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