API 650 unanchored liquid-storage tanks formulas

Before the start of erection, inspect each API 650 tank foundation to ensure that it is level and acceptable to receive Work. Remove temporary erection attachments welded to the interior or exterior of the API 650 unanchored liquid-storage tanks shell or to the bottom by arc gouging, and grind weld area smooth.

As we know, the vertical metal tank, API 650 unanchored liquid-storage tanks is welded by many components, and the welding quality of each component determines the later use effect of the API 650 unanchored liquid-storage tanks. Professional API 650 unanchored liquid-storage tanks manufacturers should have a set of professional skills in the welding process of API 650 unanchored liquid-storage tanks. Key points for weld inspection of vertical metal tank, API 650 unanchored liquid-storage tanks:
1. It is strictly forbidden to paint the welds before passing the inspection.
2. Visual inspection shall be carried out for welds.
3. NDT shall be carried out on the weld.

The refrigerated tank primary components shall also include those parts of a single-wall or an inner tank that are not in contact with the refrigerated liquid but are subject to the refrigerated temperature. Such API 650 unanchored liquid-storage tanks components include roof plates, roof manways and nozzles with their reinforcements, roof-supporting structural members, and shell stiffeners when the combined tensile and primary bending stresses in these components under design conditions are greater than 6000 lbf/in.2.

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