API Std 650 ground supported flat-bottom tanks bottom joints

The internal floating plate of internal floating roof tank of API 650 tank is different from that of open floating plate of API Std 650 ground supported flat-bottom tanks External floating roof tank of API 650 tank, so it is impossible to have rain and snow load.

Generally, the building area temperature of the API Std 650 ground supported flat-bottom tanks should be considered before the tank design and construction. The temperature in the API Std 650 ground supported flat-bottom tanks building area is closely related to the evaporation loss, energy loss, storage tank materials and the selection of detection instruments, or has a direct impact on the storage cost of the storage liquid. For the same medium, the higher the air temperature and the longer the duration, the higher the material temperature in the API Std 650 ground supported flat-bottom tanks, the higher the corresponding pressure and the more volatile loss.

The thickness of the API Std 650 ground supported flat-bottom 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.

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The trend of international shipping development of large-scale ships and strategic joint ventures puts forward higher requirements for modern ports. Modern ports no longer use the general cargo throughput as a measure sign, and container throughput will become the main sign to measure the role and status of modern ports. The average container capacity in 2000 is 3200teu, and it is expected to be 5500teu in 2020.