API Std 650 carbon and low-alloy steel tanks full-face gasket

Structural shapes of 9% and 5% nickel steel may be furnished to the chemical and physical requirements of ASTM A353, A553, or A645. Physical tests shall be in accordance with the requirements of ASTM A6.
API Std 650 carbon and low-alloy steel tanks used Piping, Tubing, and Forgings
Material used for piping, tubing, and forgings shall be compatible in welding strength, and thermal expansion coefficient with the tank shell material. In addition to the specific requirements of this appendix, all piping within the limitations of 1.3.2 shall fulfill the minimum requirements of ASME B31.3.

The standard API 650 covers the design and calculation of different parts of the API Std 650 carbon and low-alloy steel tanks fuel tank. This specification is based on the knowledge and experience of buyers, manufacturers and users of API 650 welded storage tanks of different sizes and capacities. It is worth noting that the code requirements are minimal; stricter standards can be adopted for specific applications.

The foundation design of the API Std 650 carbon and low-alloy steel tanks should meet the requirements of foundation stability and deformation, that is, the API Std 650 carbon and low-alloy steel tanks foundation should not be crushed and the uneven settlement value of the foundation should be within the allowable range. The uneven settlement of the storage tank foundation should be specified in the design process of the safe allowable range, because excessive uneven settlement will reduce the safety of the API Std 650 carbon and low-alloy steel tanks and cause distortion and deformation of the tank wall and bottom plate.