API Spec 12B

Please note that the API Monogram Program effective date for the this document's next edition is June 2021. Until then, this edition will still be considered active and not historical.This specification covers material, design, fabrication, and testing requirements for vertical, cylindrical, aboveground, closed and open top, bolted steel storage tanks in various standard sizes and capacities for internal pressures approximately atmospheric, not to exceed those listed in Section 4.1.This specification is designed to provide the oil production industry with safe and economical bolted tanks for use in the storage of crude petroleum and other liquids commonly handled and stored by the production segment of the industry. This specification is for the convenience of Purchasers and Manufacturers in ordering and fabricating tanks.