API 650 aboveground petroleum storage tanks internal structures

Deformation of the welding seam of the API 650 aboveground petroleum storage tanks is a common quality problem during the actual use of the API 650 aboveground petroleum storage tanks, which easily causes the tank body to leak and affects the safety of the oil storage tank. The welding seam deformation of the API 650 aboveground petroleum storage tanks is mainly caused by the lack of reserved welding seam gap and irregular operation. The oil storage tank has not reserved the corresponding weld gap, resulting in deeper root removal during the front welding activity. The heat output of the weld will increase under the influence of a long time, and the deformation of the weld will gradually become serious.

API 620 Crude Oil Tank Pneumatic Pressure
An air pressure equal to 1.25 times the pressure for which the vapor space is designed shall be applied to the enclosed space above the water level. In the case of a double-wall tank with an open-top inner tank, where the air pressure acts against the outer tank and the inner tank is thus not stressed by the air pressure, the inner API 650 aboveground petroleum storage tanks may be emptied of water before the pneumatic pressure test begins. The test pressure shall be held for 1 hour.

This API 650 tank standard is designed to provide industry with tanks of adequate safety and reasonable economy for use in the API 650 aboveground petroleum storage tanks storage of petroleum, petroleum products. and other liquid products.

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