API 650 ground supported tanks sliding friction

When API 650 storage tank is designed, when the design pressure is small F2 kPa, the impact of air pressure on the API 650 ground supported tanks tank wall thickness is not considered in the tank wall design.

Welding inspection of bottom plate of API 650 ground supported tanks, vertical oil tank: During the fabrication and installation of API 650 ground supported 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 650 ground supported 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.

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