Closed top API 650 ground supported liquid storage tanks
API 650 petroleum storage tank pipeline stress and product pressure, tank pressure, uniform or non-uniform temperature difference between the tank wall and the tank bottom, which cause the radial displacement and longitudinal rotation of the API 650 ground supported liquid storage tanks tank wall at the opening to affect the oil tank wall The impact is obvious. Therefore, the design must ensure that the load applied by the external pipeline on the opening of the tank wall is within the safety limit. If the stress of the API 650 ground supported liquid storage tanks connecting piping is not handled properly, the wall of the API 650 petroleum storage tank may deform or even rupture, causing a major accident.
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.
Proper use of API 650 ground supported liquid storage tanks and precautions:1. The API 650 ground supported liquid storage tanks must be used within the safe height range;2. Check before use to ensure that the safety valve and breathing valve are flexible and easy to use;3. The explosion-proof and fire-proof safety measures for oil tanks are implemented effectively;4. The oil level in the API 650 ground supported liquid storage tanks should be accurately measured when receiving and delivering oil, so as to prevent overflow or empty;5. In the process of receiving and sending oil, the flow rate of oil should be controlled, and it should not be too fast to avoid electrostatic accidents.
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