API standard 650 flat-bottom steel tanks with heavy or tall shells

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 standard 650 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.

API standard 650 flat-bottom steel tanks construction must adhere to the design drawings, acceptance specifications and construction plans. If the design needs to be modified during API standard 650 flat-bottom steel tanks construction, it must be approved by the original design unit or Party A’s representative and relevant personnel of the supervision unit, and written visa procedures must be completed in advance. The equipment and main materials used in the oil tank construction project must have certificates of conformity and quality assurance.

The Charpy V-notch test shall be used, and the minimum impact value at the design metal temperature shall be as given in Table R-2. For subsize specimen acceptance criteria, see ASTM A20. An impact test temperature lower than the design metal temperature may be used by the API 620 welded storage tanks Manufacturer, but in such a case the impact values at the test temperature must comply with Table R-2.

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