API 650 flat-bottom oil storage tanks rod, bar, and structural shapes

The standard API 650 covers the design and calculation of different parts of the API 650 flat-bottom oil storage tanks fuel tank. This specification is based on the knowledge and experience of buyers, manufacturers and users of API 650 welded storage tanks of different sizes and capacities. It is worth noting that the code requirements are minimal; stricter standards can be adopted for specific applications.

In this project, the area of tank wall used is of the same construction, material, and geometry as that described in F.1.3.1 except that the thickness of the plate is 3/8 in. The wall is stressed in the same manner as is described in F.1.3.1. A corrosion allowance of 1/16 in. is required. The computed (meridional) tensile stress, stc, in the net thickness after deduction of the corrosion allowance is 8000 lbf/in.2.
The problem in this example is to find the maximum allowable (latitudinal) compressive stress value for the given conditions, in conformance with the provisions of API 620 tank standard 5.5.4.5.
Solution: As determined from Table 5-1, the maximum allowable tensile stress value, Sts, for ASTM A285, Grade C, steel plate in simple tension is 16,500 lbf/in.2. Since the compressive stress is latitudinal, the governing value of R in this situation is R1, or 75 in.

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

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