API standard 650 partially anchored liquid-storage tanks toughness requirements of plates
Requirements for prefabrication of bottom plate of large vertical API standard 650 partially anchored liquid-storage tanks:1 The diameter of tank bottom should be enlarged by 01% ~ 015% according to the design diameter2 The minimum dimension of edge plate along the radius direction of tank bottom shall not be less than 700mm3 The distance between any adjacent welds of the base plate shall not be less than 300 mm
Changes in Tank ShapeIf in any of the foregoing tests there is an excessive rise of the bottom of the tank around the boundary of contact with grade, or off its foundations, or if any of the specified conditions of test loading cause other appreciable changes in the shape of the tank, the design shall be reviewed and means shall be provided in the tank for holding the shape within permissible limits under all conditions of loading,API standard 650 partially anchored liquid-storage tanks. Additional TestsThe tests prescribed in API 620 tank 7.18 are believed to be sufficient for most tanks constructed according to these rules; if, in the opinion of the designer, additional tests are needed to investigate the safety of a tank under certain other conditions of loading, as determined from the design computations, these tests shall be made on the tank involved in addition to the tests specified in this standard.
The thickness of the overburden on the top of the API 650 oil tank should not be less than 0.5m. The surrounding backfill with clean sand or fine soil should be no less than 0.3m thick; the API 650 oil tank API standard 650 partially anchored liquid-storage tanks operation platform ladder selection unit is considered in a unified manner. The buried operation well is designed for buried horizontal oil tanks, and the two are compatible.
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