API standard 650 duplex stainless steel tanks reinforcement and welding

No matter what type of storage tank needs to be built, the natural conditions of the geographical area where the tank is located should be fully considered in the design. Because natural conditions will affect the service life, storage safety and construction cost of storage tanks such as API standard 650 duplex stainless steel tanks. Generally, the natural conditions that need to be considered before API standard 650 duplex stainless steel tanks design and construction are: regional temperature, wind load, snow load, ground endurance, external environment corrosion, etc.

Impact Test Requirements for Oil Storage Tanks Primary Components
All API standard 650 duplex stainless steel 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 floating roof is the top cover floating on the liquid level, so the sealing performance of API standard 650 duplex stainless steel tanks API 650 oil storage tank is very important. The floating plate mainly adopts elastic packing, and at the same time, it is compressed with the wall of API 650 oil storage tank with pressure strip around, and fixed with the floating plate with bolts. After the API standard 650 duplex stainless steel tanks floating plate is lowered to a certain position of about 1.8m, a prop will support the floating plate to keep it in position.

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