Superior Tank Co., Inc a leading Designer, Fabricator and Erector of Bolted Steel Storage Tanks per AWWA D103-97, API-12B and NFPA-22 Standards and Welded Steel Storage Tanks per AWWA D100-96, API-650 and NFPA-22 Standards for Potable Water, Wastewater, Dry Bulk, Fire Protection and Crude Oil Industries. Superior Tank also Repairs, Retrofits and Dismantles existing Bolted ...