A516 grade 65 plates API Std 650 ground supported liquid storage tanks

API 650 "welded storage tanks" API Std 650 ground supported liquid storage tanks is a standard developed and issued by the American Petroleum Institute (API), which specifies the minimum requirements for the design, manufacture, installation and inspection of welded storage tanks.

All oil tanks have service life. Due to the pressure of the oil stored on the tank and the corrosion of the oil and external environment on the tank, the oil storage tank will gradually become thin or crack after a long time. Due to the different materials and environment of API Std 650 ground supported liquid storage tanks, the consumption of API Std 650 ground supported liquid storage tanks is different, so it should be taken into account when evaluating the remaining service life of API Std 650 ground supported liquid storage tanks.

Insulation Load
For API 620 tanks designed and constructed with an outer tank containing loose fill insulation in the annular space between the tanks, the insulation weight shall be divided equally to the inner and outer tank wall for seismic lateral loads unless a more rigorous analysis is performed to determine the distribution. The insulation within the annular space shall not be used to calculate resistance to overturning. Insulation on the API Std 650 ground supported liquid storage tanks roof or suspended deck shall be applied to the tank supporting the load at the point or center of gravity of attachment and may be used to resist overturning.

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