A question regarding the \"Code for Design of Oil Storage Tanks\"
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Regarding clause 6.0.8 of the Code for Design of Oil Storage Tanks, it stipulates that the distance from the tank wall of above-ground vertical oil tanks to the inner edge line of the fire dike should not be less than half of the tank wall height. ”Which height is meant by the so-called tank wall height? Is it the highest height from the tank farm floor to the top of the tank wall, or just the height of the tank wall itself? I think it should be the former. Please share your own understanding
The height of the tank wall is the effective height; the height of the tank top is greater than that of the tank wall, and the excess part is the ineffective height； Additionally, it should be measured from the floor level
It’s 1/2 can high. Tank spacing: generally, 0.4d for floating roofs and 0.6d for vaulted roofs
It should include the tank foundation plus half of the tank wall height, in order to prevent flammable liquids from spilling outside the fire dike in the event of a tank rupture; the maximum distance that the liquid inside the tank can spill is half of its absolute height
It should be the former; the purpose of a fire dike is to prevent oil from leaking out, so it should be the actual height at which the oil tank can hold oil, and not the level of the floor
According to the \"Code for Design of Oil Storage Tanks\" GB 50074-2002, the spacing between oil tanks is related to the diameter and height of the tanks. Does this height refer to the height of the tank wall or the total height of the tank? In API650 (Welded Steel Tanks for Oil Storage) and NFPA30 (Flammable and Combustible Liquids Code), the tank height, which is what you refer to as the height of the tank, denotes the height of the tank walls. GB50074 likely uses some data from the aforementioned standards; therefore, the height of an oil tank refers to the distance between the elevation of the tank bottom plate and the corner steel framing (in the case of a conical-top tank), which is what is generally understood as the thickness of the tank wall. Refer to http://bbs.pecbbs.com/thread-76287-1-1.html
The actual effective tank height is the distance from the measurement reference point of the oil tank to the gauging point.