API 650 anchored liquid-storage tanks plumbness

Requirements for prefabrication of the top of large vertical API 650 anchored liquid-storage tanks: The prefabrication of the tank top shall be prefabricated in blocks according to the drawings. Pay attention to the spacing of the welds after installation when setting out the material. Reinforcing ribs should be formed and inspected with an arc-shaped template. When a single top plate needs to be spliced, butt joints should be used. The forming of a single top plate should be welded between the reinforcing ribs and the top plate on the mould. After forming, check with an arc-shaped sample plate, and the gap should not be greater than 10 mm.

This standard establishes minimum requirements for API 650 tank material, API 650 anchored liquid-storage tanks design, fabrication, erection, and inspection for ertical. aboveground，closed- and open-top.

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