API standard 650 duplex stainless steel tanks manual welding

The foundation design of the API standard 650 duplex stainless steel tanks should meet the requirements of foundation stability and deformation, that is, the API standard 650 duplex stainless 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 standard 650 duplex stainless steel tanks and cause distortion and deformation of the tank wall and bottom plate.

The API standard 650 duplex stainless steel tanks outer wall shall be designed for the purging and operating pressure of the space between the inner and outer tank shells and for the loading from the insulation, the pressure of wind forces, and the roof loading.
The outer tank bottom, shell, and roof shall have a minimum nominal thickness of 3/16 in. (7.65 lbf/ft2) and shall conform to the material requirements of Q.2.3.

This API 650 tank standard does not present orstablish a fixed series of allowable tank sizes: instead, it s intended to permit the purchaser to select whatever size API standard 650 duplex stainless steel tanks tank may best meet his needs.