ISO 630 grade E275 plates API standard 650 self-anchored storage tanks

The welded API 650 tank in various sizes and capacities for internal pressures approximating atmospheric pressure (internal pressures not exceeding the weight of the roof plates), but a higher internal pressure API standard 650 self-anchored storage tanks is permitted when additional requirements are met.

API 620 Steel Oil Tank Bottom and Shell Support
The tank API standard 650 self-anchored storage tanks under-bottom insulation shall be designed to resist the combined pressures from the product load, the overturning seismic load and the vertical seismic load. These seismic pressures may be combined by SRSS.
The bearing ring under the shell shall be designed to resist the calculated OLE peak compressive force in the tank shell due to overturning (see API 650 oil tank, Section E.6.2.2), including dead and live loads. A 33 % increase in allowable bearing stress is permitted.

With the continuous development of large-scale oil storage tanks, the foundation of API standard 650 self-anchored storage tanks has also continued to grow. Among them, API standard 650 self-anchored 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.

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