API 650 anchored liquid-storage tanks low-type nozzles

Anti corrosion of API 650 anchored liquid-storage tanks:
After using for a certain period of time, it is necessary to check the corrosion protection of the API 650 anchored liquid-storage 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 anchored liquid-storage tanks does not fall off and has good waterproof and rust resistance.
API 650 anchored liquid-storage tanks cleaning:
The long-term use of API 650 anchored liquid-storage 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 anchored liquid-storage tanks shall be cleaned and derusted regularly to ensure the quality of oil stored and the safety of oil tank equipment.

Allowable Design Stresses
The maximum allowable design stresses for the API 650 anchored liquid-storage tanks materials outlined in Q.2.1 shall be in accordance with Table Q-3.The values for the allowable design tensile stress given in Table Q-3 for materials other than bolting steel are the lesser of (a) 331/3% of the specified minimum ultimate tensile strength for the material or (b) 662/3% of the specified minimum yield strength, but they are 75% of the specified minimum yield strength for the stainless steel, nickel alloy, and aluminum materials. Allowable test stresses are based on the limitation of API 620 oil tank storage standard Q.8.1.3.

Under the same sealing effect, the internal API 650 anchored liquid-storage tanks floating roof API 650 tank can further reduce the evaporation loss compared with the external floating roof API 650 tank. This is due to the shielding of the fixed roof and the gas phase layer between the fixed roof and the inner floating plate, which has more significant heat insulation effect than the double disc floating roof of the API 650 anchored liquid-storage tanks external floating roof tank.