API 650 duplex stainless steel tanks threaded connections

Generally speaking, the duration of the "exhalation" of the API 650 duplex stainless steel tanks is longer than that of the "inhalation" of the API 650 duplex stainless steel tanks every day. There are many factors affecting the "small breathing" loss, mainly including the following points: the change of temperature difference between day and night, sunshine time of the API 650 duplex stainless steel tanks location, open area of the API 650 duplex stainless steel tanks, atmospheric pressure, filling degree of API 650 duplex stainless steel tanks, etc. When the API 650 duplex stainless steel tanks is full of gas, the space volume is small, and the "small breathing" loss is less; if the space volume is large, the loss is also large.

Shell Stiffening Rings for Tanks That Contain Liquid
Internal or external shell stiffening rings may be required to maintain roundness when the tank is subjected to wind, vacuum, or other specified loads. When API 650 duplex stainless steel tanks stiffening rings are required, the stiffener-to-shell weld details shall be in accordance with Figure Q-1 and Q.3.5.2 through Q.3.5.5.
Three-plate laps or butt-weld junctions in tank bottoms shall be not closer than 12 in. from each other or from the butt-welds of the annular plates.
Bottom plates, other than annular bottom plates for a 9% or 5% nickel steel or stainless steel tank that contains liquid, may have a minimum thickness of 3/16 in. exclusive of any specified corrosion allowance.

API 650 petroleum storage tank basic knowledge, storage tank concept and use: API 650 duplex stainless steel tanks storage equipment for storing crude oil, gasoline, kerosene, petroleum and various non-volatile chemicals, API 650 petroleum storage tank is a storage and transportation system facility, oil refining, chemical industry An important part of the device.