STI/SPFA is a not-for-profit trade association representing the steel fabrication industry. Our nearly 200 member companies 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.

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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.


Advocacy: Protecting your business environment

On behalf of the steel fabrication industry, our technical staff and many member volunteers participate in agency meetings, regulatory and code development, and related industry conferences each year. These people are looking out for your interests with EPA, OSHA, UL, ULC, NFPA, ASME and other bodies that directly affect you. We also maintain collegial relationships with API, PEI, ASTM, ASCE, NACE, FMA, NISTM, AISI, MSCI and other related organizations. That's an inestimable value of membership: STI/SPFA represents your interests when you can't be in the room.

Standards and quality control

STI's UST and AST tank standards and specifications are recognized by customers and regulators as the best in the market. More than 450,000 shop fabricated storage tanks have been built under the STI label. Our Quality Control program ensures that STI licensed fabricators meet the stringent standards for STI technologies.



STI/SPFA is the recognized source for training and certification in SP001 and cathodic protection inspection. Nearly 1,000 individuals are certified through our programs, many of them regulators responsible to state tank oversight agencies. Recognizing that all tanks require ongoing maintenance, STI/SPFA offers an online certificate in Tank Integrity Management. 

Industry education

STI/SPFA regularly schedules seminars, webinars, and other educational opportunities, bringing together industry experts in tank maintenance, field erected water storage, steel water pipe, and similar topics. These programs are offered to members and non-members alike, providing not only education, but also emphasizing steel as the material of choice for these industry segments. Many of these programs are archived on our website for future learning opportunities.

Personnel training

Members have exclusive access to a large online library of safety bulletins, personnel incidents, and presentations from STI/SPFA's Safety & Health Committee. Also available to members is a series of training videos to assist in developing knowledgeable employees.


Customer connections

All members are listed in our Find a Member searchable database--the most-visited page on the STI/SPFA website. Included are your contact information, product lines, and a link to your website. Current and

potential customers, specifying engineers, consultants and others can find you by name, location and/or product/service.

Technical and market support

STI tank manufacturers find technical documents and specifications on the Members Only website pages. Steel pipe fabricators improve marketability with the Pipe Quality Audit certification program. Field erected storage tank manufacturers help their customers with the Total Cost of Ownership online application. And all members get free assistance from our expert consultants in safety and health, fire codes, regulations and manufacturing


At the Annual Meeting and Fall Conference each year, fabricators and suppliers come together to renew old friendships and create new relationships. Speakers from the legal, insurance, risk management, regulatory, and standards arenas bring vital information to the meeting presentations. STI/SPFA committee meetings offer every member a chance to both contribute to and gain from involvement in the organization.

Marketing and promotion

The strength of STI/SPFA's member support allows us to develop marketing tools to promote steel as the material of choice, many of them available to members to carry the message out to the marketplace. Our staff members exhibit and speak at many industry-related conferences, enhancing the standing and visibility of the steel fabrication industry.

Newsletters and communication

STI/SPFA publishes four, quarterly electronic newsletters:

  • Tank Talk is a digest of news about the industry in all its markets. Recognized authorities contribute in-depth articles, as well. Tank Talk is sent to nearly 10,000 subscribers, including federal and state agency regulators.
  • Education Connection promotes STI/SPFA's many educational programs to 8,000+ subscribers.
  • Safety & Health Spotlight is a members-only newsletter specifically for safety and other interested personnel at member companies. Latest news from OSHA, UL, and other rule-making bodies appears here, as well as information gathered by the Safety & Health Committee.
  • The Insider is the newsletter that keeps our members up to date with association news. Member company news appears here, as well as details about upcoming events, members-only technical information, and more.


STI/SPFA's Safety & Health Forum blog is where we post recall information and other safety matters. Members can discuss these items online and post their own items.