ASTM A737 plates API standard 650 self-anchored flat-bottom steel tanks
Welding inspection of bottom plate of API standard 650 self-anchored flat-bottom steel tanks, vertical oil tank: During the fabrication and installation of API standard 650 self-anchored flat-bottom steel tanks, the bottom edge plate is welded first. According to the requirements of the technical standard, penetrant inspection is required for the weld of edge plate at the bottom of API standard 650 self-anchored flat-bottom steel tanks, that is, penetrant testing is required for each weld bead priming, filling and capping. In the process of testing, if any defect is found, it shall be repaired immediately. After the repair, the surface coloring penetrant test shall be conducted again until the test result is qualified.
API standard 650 self-anchored flat-bottom steel tanks any joints between the adjacent sections of stiffening rings, as shown in Figure R-1, shall be made so that the required moment of inertia of the combined ring-shell section is provided. Weld joints between adjacent sections shall be made with full-thickness and full-penetration butt-welds. Stiffening-ring butt-welds may employ metal backing strips. Backing strips and the associated welding shall be made in a manner that provides a smooth contour in the rat hole and all other weld joints ends. All weld passes shall be started at the rat hole.
Welded steel API standard 650 self-anchored flat-bottom steel tanks storage tanks that are designed, manufactured and installed on the ground are classified according to the API standard system. The three API standards API standard 650 self-anchored flat-bottom steel tanks all adopt on-site production and installation of storage tanks.
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