Floating roof tank – External floating roof tank

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The floating roof of the tank (abbreviated as float roof) floats on the liquid surface. There is an annular space between the floating roof and the tank wall, which contains sealing elements. Together, the floating roof and these sealing elements form a covering layer over the liquid surface. As the liquid level rises and falls, this layer completely isolates the stored liquid from the atmosphere, thereby reducing evaporation losses during storage, ensuring safety, and minimizing air pollution. Single-deck floating roof: An annular floating vessel composed of several independent compartments, with a single-deck top plate on its inner annular side. The bottom of the single-disc roof is reinforced with multiple annular steel rings. Its advantages are low cost and easy maintenance. Double-disc floating roof: It consists of an upper disc plate, a lower disc plate, and deck edge plates, and is divided into several separate annular compartments by radial and circumferential partitions. Its advantages are great buoyancy and good drainage effect.