API 650 self-anchored flat-bottom steel tanks shell

Standard API 650 tank calls for calculations based on the specific gravity of the liquid product being stored. This permits the thickness of the steel API 650 self-anchored flat-bottom steel tanks needed as well as other specifications of how the tank is built to be determined by the weight of the API 650 tank.

Generally speaking, the duration of the "exhalation" of the API 650 self-anchored flat-bottom steel tanks is longer than that of the "inhalation" of the API 650 self-anchored flat-bottom steel tanks every day. There are many factors affecting the "small breathing" loss, mainly including the following points: the change of temperature difference between day and night, sunshine time of the API 650 self-anchored flat-bottom steel tanks location, open area of the API 650 self-anchored flat-bottom steel tanks, atmospheric pressure, filling degree of API 650 self-anchored flat-bottom steel tanks, etc. When the API 650 self-anchored flat-bottom steel tanks is full of gas, the space volume is small, and the "small breathing" loss is less; if the space volume is large, the loss is also large.

Temporary Openings after Hydrostatic Test
When approved by the Purchaser in writing, and only in the case of tanks which when complete have no shell penetrations, it is permitted to restore by welding up to four temporary shell openings after the hydrostatic test in accordance with the provisions of this section. Each temporary opening shall be restored by the insertion of a shell plate that matches the thickness and specification of adjacent shell material, and is welded into place with full fusion butt-welds. The API 650 self-anchored flat-bottom steel tanks insert plate shall be round with diameter no less than 24 in. and no greater than 42 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.