API 650 ground supported flat-bottom tanks constructed according to API Standard 650

The normal operation of API 650 ground supported flat-bottom 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 650 ground supported flat-bottom tanks correctly, it is necessary to be familiar with and master the structure and performance of the API 650 ground supported flat-bottom 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.

Impact Test Requirements for Oil Storage Tanks Primary Components
All API 650 ground supported flat-bottom tanks primary components of 9% or 5% nickel steel shall be impact tested in accordance with Q.2.2.2 through Q.2.2.4. Impact testing is not required for primary components of austenitic stainless steel, nickel alloy, and aluminum materials. Welds in high-alloy (austenitic) stainless steel shall be impact tested if required by Q.6.3.
Impact testing of plates, including structural members made of plate, shall comply with the following:a)Impact test specimens shall be taken transverse to the direction of final plate rolling. b)Charpy V-notch specimens shall be cooled to a temperature of –320°F for A353, A553, and A645 steels for impact testing.

The API 650 is the American standard for welded flat-bottomed vertical API 650 ground supported flat-bottom tanks storage tanks. This standard dictates tank design, manufacture, welding, inspection and installation requirements.

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