API 650 anchored liquid-storage tanks greater than 60 m in diameter

The increased uplift described in API Standard 620 tank Appendix Q is intended to apply to the size of the ringwall and foundation but not the anchorage. For tanks with an internal design pressure of 1 lbf/in.2 gauge and over, the uplift, if any, shall be calculated under the combined conditions of 1.25 times the internal design condition plus the design wind load on the API 650 anchored liquid-storage tanks shell and roof.

The API 650 is the American standard for welded flat-bottomed vertical API 650 anchored liquid-storage tanks storage tanks. This standard dictates tank design, manufacture, welding, inspection and installation requirements.

After using for a certain period of time, it is necessary to check the corrosion protection of the metal oil tank and paint the outer wall of the API 650 anchored liquid-storage tanks with anti-corrosion paint. The inlet and outlet valves of API 650 anchored liquid-storage tanks shall be inspected and maintained regularly to ensure they are in good condition. Oil tank will produce a lot of dirt when it is stored for a long time. Usually, the cleaning cycle of metal oil tank is about three to five years.