API Std 650 self-anchored flat-bottom steel tanks load combinations

All oil tanks have service life. Due to the pressure of the oil stored on the tank and the corrosion of the oil and external environment on the tank, the oil storage tank will gradually become thin or crack after a long time. Due to the different materials and environment of API Std 650 self-anchored flat-bottom steel tanks, the consumption of API Std 650 self-anchored flat-bottom steel tanks is different, so it should be taken into account when evaluating the remaining service life of API Std 650 self-anchored flat-bottom steel tanks.

Temporary Openings after Hydrostatic Test
When approved by the Purchaser in writing, and only in the case of tanks which when complete have no shell penetrations, it is permitted to restore by welding up to four temporary shell openings after the hydrostatic test in accordance with the provisions of this section. Each temporary opening shall be restored by the insertion of a shell plate that matches the thickness and specification of adjacent shell material, and is welded into place with full fusion butt-welds. The API Std 650 self-anchored flat-bottom steel tanks insert plate shall be round with diameter no less than 24 in. and no greater than 42 in.

Design calculations and drawings required API Std 650 self-anchored flat-bottom steel tanks for the fabrication and erection of each API 650 tank. A drawing index for each API 650 tank is required and shall be re-submitted each time drawings are revised and re-issued.

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