API 650 flexible liquid storage tanks external pressure
Welding inspection of bottom plate of API 650 flexible liquid storage tanks, vertical oil tank: During the fabrication and installation of API 650 flexible liquid storage 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 flexible liquid storage 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.
Structural shapes of 9% and 5% nickel steel may be furnished to the chemical and physical requirements of ASTM A353, A553, or A645. Physical tests shall be in accordance with the requirements of ASTM A6.API 650 flexible liquid storage tanks used Piping, Tubing, and ForgingsMaterial used for piping, tubing, and forgings shall be compatible in welding strength, and thermal expansion coefficient with the tank shell material. In addition to the specific requirements of this appendix, all piping within the limitations of 1.3.2 shall fulfill the minimum requirements of ASME B31.3.
API 650 storage tank, double-layer oil tank environmental protection advantages: ordinary single-layer steel API 650 flexible liquid storage tanks oil tank is corroded by underground water and gas and electrolytic corrosion because it is buried underground all year round. The API 650 tank has a double-layer structure with a gap of 0.1 mm. The API 650 flexible liquid storage tanks outer layer of FRP ensures that the leakage will not directly leak into the soil and water source.
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