API Std 650 flexible liquid storage tanks emergency roof drains

Welded steel API Std 650 flexible liquid storage tanks storage tanks that are designed, manufactured and installed on the ground are classified according to the API standard system. The three API standards API Std 650 flexible liquid storage tanks all adopt on-site production and installation of storage tanks.

Generally speaking, the duration of the "exhalation" of the API Std 650 flexible liquid storage tanks is longer than that of the "inhalation" of the API Std 650 flexible liquid storage 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 Std 650 flexible liquid storage tanks location, open area of the API Std 650 flexible liquid storage tanks, atmospheric pressure, filling degree of API Std 650 flexible liquid storage tanks, etc. When the API Std 650 flexible liquid storage 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.

A cylindrical nozzle with a 12-in. inside diameter is located in solid plate in the sidewall of a cylindrical storage tank 60 ft in diameter so that its axis lies in a horizontal plane and forms an angle of 55° with a perpendicular to the sidewall at the point of intersection, as shown in Figure F-7. The thickness of the API Std 650 flexible liquid storage tanks sidewall plate, tw, in this area is 5/8 in., and no corrosion allowance is required. The total internal pressure, Pl + Pg, at the center of the opening is 26.1 lbf/in.2 gauge.

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