Superior Tank Co., Inc. was the first to introduce powder coatings to the Bolted Steel Storage Tank market. STCI manufactures and installs Bolted Steel Storage Tanks for the potable water, wastewater, dry bulk, fire protection and crude oil industries. Our services include engineering, design, fabrication, installation, dismantling, retrofits, maintenance agreements and financing. Our Steel Storage Tanks range from 10,000 – 2.5 million gallons and are designed to AWWA, NFPA, FM & API specifications..