API Spec 12B:2008

Covers material, design, fabrication, and testing requirements for vertical, cylindrical, aboveground, closed and open top, bolted steel storage tanks with internal pressures approximately atmospheric at various sizes and capacities ranging from 100 to 10000 barrels. Tanks covered by this specification have been designed using established engineering calculations to determine minumum metal thickness and bolting specifications for each size tank filled with water. This specification is designed to provide the oil production industry with tanks of adequate safety and reasonable economy for use in the storage of crude petroleum and other liquids commonly handled and stored by the production segment of the industry.