The standard API 650 covers the design and calculation of the different elements of the tank. In view of the materials of construction, requirements and recommendations are set forth, i.e. erection sequences, welding procedures, tests and inspections as well as guidelines for operation. 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 roof, with temperatures no higher than 93, 3 ° C are included in the scope of this design code. Internal temperatures could go up to 260 ° C with certain restrictions.
Vertical cylindrical flat bottom tanks allow us to store large volumetric quantities at low cost, with the only limitation that they can only be used at atmospheric pressure or relatively small internal pressures.
