API standard 650 self-anchored flat-bottom tanks piping and forgings

Fixed roof API 650 oil storage tank includes inner floating roof tank, which API standard 650 self-anchored flat-bottom tanks can effectively prevent sand, rain, snow or dust from polluting the storage liquid. Under various weather conditions, API 650 oil storage tank can ensure the quality of liquid storage, which is called "all-weather API standard 650 self-anchored flat-bottom tanks storage tank".

The foundation design of the API standard 650 self-anchored flat-bottom tanks should meet the requirements of foundation stability and deformation, that is, the API standard 650 self-anchored flat-bottom tanks foundation should not be crushed and the uneven settlement value of the foundation should be within the allowable range. The uneven settlement of the storage tank foundation should be specified in the design process of the safe allowable range, because excessive uneven settlement will reduce the safety of the API standard 650 self-anchored flat-bottom tanks and cause distortion and deformation of the tank wall and bottom plate.

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 standard 650 self-anchored flat-bottom tanks insert plate shall be round with diameter no less than 24 in. and no greater than 42 in.

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