ABOVEGROUND STORAGE TANKS or ASTs
What are they and what kinds of tanks are produced by STI/SPFA Members?

Members of STI/SPFA produce Shop Fabricated Atmospheric Tanks  in accordance with proprietary specifications developed by Steel Tank Institute (STI) or members' company designs that meet or exceed industry-specific requirements and all applicable codes and regulations. 

Only Members of STI/SPFA are qualified to produce STI Licensed Technologies.

STI Licensed AST Technologies include single and double-wall tanks aboveground storage tanks available in horizontal, vertical and retangular designs and generator base tanks. Examples of tanks built to STI Specifications are available here.