API 650 carbon and low-alloy steel tanks structural member attachment

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Anti corrosion of API 650 carbon and low-alloy steel tanks:
After using for a certain period of time, it is necessary to check the corrosion protection of the API 650 carbon and low-alloy steel tanks. If necessary, the outer wall of the metal oil tank should be painted with new anti-corrosion paint to ensure that the outer wall of the API 650 carbon and low-alloy steel tanks does not fall off and has good waterproof and rust resistance.
API 650 carbon and low-alloy steel tanks cleaning:
The long-term use of API 650 carbon and low-alloy steel tanks will produce impurities on the tank wall and deposit on the tank bottom, resulting in tank corrosion to leakage. According to the safety standard of oil tank, the API 650 carbon and low-alloy steel tanks shall be cleaned and derusted regularly to ensure the quality of oil stored and the safety of oil tank equipment.

Proof Tests for Establishing Allowable Working PressuresBecause pressures in liquid storage tanks built according to these rules vary quite markedly from the tops to the bottoms of the tanks, proof testing of these tanks presents problems not usually encountered in the construction of unfired pressure vessels–especially where the API 650 carbon and low-alloy steel tanks parts under investigation are located near the bottoms of the tanks. The principal difficulty is devising a test or series of tests that will reliably establish the working pressure that can be permitted on the part of the unproven design without, at the same time, imposing hazardous conditions on other parts located at higher levels in the tank.