The design and construction for API standard 650 open-top tanks

As we know, the vertical metal tank, API standard 650 open-top tanks is welded by many components, and the welding quality of each component determines the later use effect of the API standard 650 open-top tanks. Professional API standard 650 open-top tanks manufacturers should have a set of professional skills in the welding process of API standard 650 open-top tanks. Key points for weld inspection of vertical metal tank, API standard 650 open-top tanks:
1. It is strictly forbidden to paint the welds before passing the inspection.
2. Visual inspection shall be carried out for welds.
3. NDT shall be carried out on the weld.

In this project, an area of 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 problem in this example is to find the maximum allowable (latitudinal) compressive stress value for the given conditions, in conformance with the provisions of API 620 tank standard 5.5.4.5.

API 650 stipulates that an open tank should be provided with a wind-resistant ring to ensure that the API standard 650 open-top tanks tank body maintains its roundness when subjected to wind. There are no hard and fast rules for vault API 650 storage tanks. It can be determined by comparing the equivalent wall height with the maximum height of the unreinforced tank wall.

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