API Std 650 welded tanks for oil storage ultrasonic examination

API 650 Tanks in which liquid fluids are stored and designed to withstand atmospheric pressure operation, less than 18 kPa, or internal pressures not exceeding the weight of the API Std 650 welded tanks for oil storage roof, with temperatures no higher than 93, 3 C are included in the scope of this design code.

Atmospheric API Std 650 welded tanks for oil storage inspection includes annual inspection and comprehensive inspection. Annual inspection is an inspection during operation to ensure the safety of atmospheric storage tanks during the overhaul period, at least once a year. Comprehensive inspection is a more comprehensive inspection of atmospheric storage tanks according to a certain inspection cycle. The inspection content of metal atmospheric API Std 650 welded tanks for oil storage includes the safety management of the storage tank, the inspection of the tank body and its operating conditions, etc.

The API Std 650 welded tanks for oil storage outer tank, which is not in contact with the vaporized liquefied gas, may be of single-welded lap or single-welded butt construction when the thickness does not exceed 3/8 in.; at any thickness, the API 620 oil tank outer tank may be of double- welded butt construction without necessarily having full fusion and penetration. Single-welded joints shall be welded from the outside to prevent corrosion and the entrance of moisture.

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