API Std 650 ground-supported liquid storage tanks alternate designs

storage tanks API Std 650 ground-supported liquid storage tanks designed in accordance with the rules and guidelines of API 650 are called API 650 storage tanks. API 650 is a control rule for welded storage tanks that work normally in the normal pressure range.

Impact Test Requirements for Oil Storage Tanks Primary Components
All API Std 650 ground-supported liquid storage 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.

Oil storage tank is an important equipment commonly used in petroleum and petrochemical industry. New API Std 650 ground-supported liquid storage tanks, metal storage tank must be tested before it can be put into use or put into storage. The common inspection methods of API Std 650 ground-supported liquid storage tanks include radiographic testing, ultrasonic testing, magnetic particle testing and dye penetrant testing. The parts and operation requirements of these testing methods are different, so they should be selected according to the required characteristics.

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