API standard 650 self-anchored flat-bottom tanks machine welding

API standard 650 self-anchored flat-bottom tanks Liquid Relief ValvesA tank, which is likely to operate completely filled with liquid, shall be equipped with one or more liquid relief valves at the top of the roof, unless otherwise protected against overpressure. When such valves are, in effect, supplementary relief devices, they may be set at a pressure not greater than 1.25 times the design pressure. Because the relief valve at the pump, which provides the inflow of liquid to the tank, is set at a pressure greater than 1.25 times the design pressure of any tank that may be built under these rules, provision should be made for preventing overfilling of the tank by a self-closing float valve, by some practicable pilot-valve control, or by any other proven device.

API 650 petroleum storage tank stipulates that if the thickness of the lower siding obtained by calculating the anti-overturning moment is greater than the thickness of the API standard 650 self-anchored flat-bottom tanks hydrostatic pressure test (both do not include the corrosion margin), the calculated thickness of the above siding required by the hydrostatic pressure is It should also be increased by the same proportion, unless special analysis is performed to determine the seismic overturning moment and corresponding stress at the bottom of each layer of API 650 petroleum storage tank wall.

Usually, the wind load in the API standard 650 self-anchored flat-bottom tanks construction area should be considered before the tank design and construction. The wind load in the API standard 650 self-anchored flat-bottom tanks construction area has an impact on the stability and economy of the API standard 650 self-anchored flat-bottom tanks. In the area with large wind load, it is safe to design the tank as "squat". When calculating the wind force, the influence of the thickness of the insulation layer of the API standard 650 self-anchored flat-bottom tanks, the shape of the ladder, the platform, the pipeline and the top cover must be considered.