Can a fixed-roof tank be converted into a floating-roof tank?
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As the title suggests, can a 500-liter fixed-roof tank be converted into a floating-roof tank? If so, what issues need to be taken into consideration? Thank you
It should work. Since the original tank has a fixed roof, it is better to use an internal floating roof with nitrogen sealing without removing the roof; moreover, it is necessary to check whether the inner wall surface of the tank is suitable for installing an internal floating roof.
First, it is necessary to check whether the original plates were joined together by overlapping or butting; if they were butted together, it should be possible to change this to an internal floating roof； Overlap is not allowed.
The lap welding can also be modified; all three of our 1,000-cubic-meter lap tanks have been converted to internal floating roofs, and the key is the treatment of the welds
This is quite difficult, right? The weld won’t be flat even after reprocessing.
Sure. A lot of what we’ve modified are vault tanks + aluminum floating boats. Note the effect of the lap weld on the tank wall on the sealing gap. Overlap does not have a significant impact on the sealing tape; nowadays, tongue-type seals are generally used, so there is no risk of jamming. When installing the seal, it is necessary to consider ensuring that the tape overlaps the tank wall on both the top and bottom rings, and to calculate the impact of the tank wall thickness. Just adjust the width appropriately when installing the tape at the bottom, and that’s it. It is best to apply an internal anti-corrosion coating to the tank walls, in order to reduce frictional resistance and ensure a more effective seal when the sealing tape is flipped up and down.
It is also necessary to check whether the manhole is a core-equipped manhole; such manholes are commonly used in floating and internal floating roof tanks to maintain the smoothness of the tank’s inner wall.
It should be possible; the air vents need to be created again on the pipe wall
It is not economical to convert a 500-cubic-meter fixed-roof tank into a floating-roof tank; there is no need to do so.
It can be changed! But it depends on the corrosion condition of his previous tanks
It can be modified, but floating boats need to be added. Additionally, a few points were not mentioned earlier: after modification, the ventilation area may become insufficient; therefore, vents or air passages should also be installed to ensure that the ventilation area of the tank meets the required standards.
It can be modified; the key is to determine whether the condition of the inner wall of the storage tank affects the operation of the floating disk
First of all, it’s a hassle to cut off the foam fluid channels in the tank using gas cutting. Then there are the welding issues mentioned above; the welding requirements for the original dome-shaped tanks are not as strict as those for tanks with an internal floating structure