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Preventive measures for weld deformation of metal oil tank

Preventive measures for weld deformation of metal oil tank -- reasonable arrangement of assembly sequence.

In the welding construction of the middle plate at the bottom of the metal oil tank, the short weld should be welded first, then the long weld should be welded in pieces, and finally the lap weld between the pieces should be welded; For the butt weld welding of edge plate, only the outer part of the weld should be welded first, and it should be welded before assembling the tank wall; Finally, the lap joint between the middle plate and the edge plate is welded.

The vertical seam of the wall plate should be evenly distributed and symmetrically welded by several welders along the circumference, so as to make the stress in the weld even and improve the stability of the metal oil tank. When welding the vertical seam, reserve 200 mm at both ends without welding. When welding the circumferential seam, weld the T-shaped seam at the same time to reduce the welding stress at the T-shaped seam.

The welder shall be evenly distributed along the circumference of the storage tank, and the welding shall be carried out in the same direction by layer flow process. Before the welding of the primary layer, the assembly clearance of the circumferential seam shall be checked. If the assembly clearance exceeds the standard, the inner side shall be sealed by manual welding in advance.

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