A573 grade 58 plates API Std 650 vertical welded storage tanks

In Appendix E to API 650 oil storage tank, the maximum values of inertia force, pulse pressure and convection pressure are superimposed, and tend to be conservative.In GB50341, only pulse pressure is calculated for API Std 650 vertical welded storage tanks tanks below 5000 m.

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