5254 aluminum plate API standard 650 tanks

Corrosion of the API standard 650 tanks body caused by external conditions such as high temperature, rain, humidity, or inadequate anti-corrosion measures of the oil storage tank itself, the water-bearing deposits in the oil storage tank caused corrosion and perforation of the inner surface of the oil storage tank bottom plate. Defects fatigue cracks caused by stress, with the accumulation of time, the compressive strength of the API standard 650 tanks body decreases and corrosion cracks occur.

API 620 Steel Oil Tank Bottom and Shell Support
The tank API standard 650 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.

The floating roof is the top cover floating on the liquid level, so the sealing performance of API standard 650 tanks API 650 oil storage tank is very important. The floating plate mainly adopts elastic packing, and at the same time, it is compressed with the wall of API 650 oil storage tank with pressure strip around, and fixed with the floating plate with bolts. After the API standard 650 tanks floating plate is lowered to a certain position of about 1.8m, a prop will support the floating plate to keep it in position.

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