API 650 SUG III tanks structural member attachment

Oil, Gas, Chemical, Water, and Bio-Fuel storage. Maximum of the most common welded steel tanks used in industry are designed following API 650. Tanks typically found in Refinery API 650 SUG III tanks tank farms, Terminals, Pipelines, and other process facilities use these tanks.

The water dissolved in the oil will be separated out from the oil stored in the API 650 SUG III tanks for a long time, and the acidic water layer will appear at the bottom of the API 650 SUG III tanks for a long time, which will accelerate the corrosion of the API 650 SUG III tanks and cause the wall thinning and even leakage. With the increase of service life, the API 650 SUG III tanks must be inspected and cleaned regularly to check the hidden danger.

Foundations and subgrade shall safely carry the weight of the tank API 650 SUG III tanks and its contents when the tank is filled with water to the highest level required for a hydrostatic test or other water-loading operations, even though the tank itself may be designed for some lesser density of liquid. However, in cases where the character of the soil justifies it and a competent soil expert advises it, allowance may be made for the relatively short duration and intermittent nature of the water loadings if suitable account is taken of all such loadings that may be expected to occur during the life of the tank, including not only those loadings that are incidental to periodic repetitions of the hydrostatic test in accordance with 7.18 but also water-filling operations for gas-freeing purposes.

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