Simplified analysis of API 650 anchored liquid-storage tanks

In this project, an area of steel storage oil tank wall is constructed of ASTM A285, Grade C, steel plate that is 5/8-in. thick and has spot-radiographed, double-welded butt joints. The wall is subject to tension in a meridional direction and to compression in a latitudinal direction. The values of R1 and R2 at the point under consideration are 75 in. and 300 in. respectively. A corrosion allowance of 1/16 in. is required. The computed (meridional) tensile stress, stc, in the net thickness after deduction of the corrosion allowance is 6000 lbf/in.2.

The internal floating plate of internal floating roof tank of API 650 tank is different from that of open floating plate of API 650 anchored liquid-storage tanks External floating roof tank of API 650 tank, so it is impossible to have rain and snow load.

With the continuous development of large-scale oil storage tanks, the foundation of API 650 anchored liquid-storage tanks has also continued to grow. Among them, API 650 anchored liquid-storage tanks vertical oil tanks are storage tanks commonly used to store crude oil, diesel, gasoline and other oil materials. This type of storage tank is set up as a cylindrical shape. The bottom of the tank is a circular flat bottom plate, and the load surface of the oil tank is basically horizontal, which can generally be regarded as a uniform load, and has greater flexibility.