Typical sizes of API standard 650 cylindrical welded storage tanks
The normal operation of API standard 650 cylindrical welded storage tanks includes receiving oil, storing oil, sending oil and measuring oil. The correct use and operation of oil storage tank is directly related to the production safety and oil loss of oil tank. In order to use and operate the API standard 650 cylindrical welded storage tanks correctly, it is necessary to be familiar with and master the structure and performance of the API standard 650 cylindrical welded storage tanks and its accessories, such as the maximum storage capacity of the oil tank, the pressure range that can bear and the safety fabrication specification.
The thickness of the API standard 650 cylindrical welded storage tanks wall plate, t, required by 5.10.3 for the latitudinal unit forces, T2, acting at this level is 0.57 in. The nozzle neck is seamless steel pipe and conforms to ASTM A53, Grade A; the materials in the tank wall and reinforcing pad conform to ASTM A442 Grade 55. The main joints in the tank walls are fully radiographed, double-welded butt joints. The adequacy of the reinforcement and attachment welds shown in Figure F-7 shall be determined.To determine the length of the nozzle neck within the limits of reinforcement, the smaller of the following calculated values shall be used:(2.5)(0.625) = 1.56 in. (2.5)(0.375) + 0.75 = 1.69 in.
The internal floating plate of internal floating roof tank of API 650 tank is different from that of open floating plate of API standard 650 cylindrical welded storage tanks External floating roof tank of API 650 tank, so it is impossible to have rain and snow load.
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