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Corrosion and loss of section in the seams of the steel floating cover skirt had allowed methane gas to leak. To prevent distortion and unbalanced forces on the cover framing, K&H developed a scheme to uniformly raise the cover with hydraulic jacks connected to 22 jacking posts/cylinders. Once elevated above the tank, the skirt corrosion was removed and repairs implemented at the seams through welding and coating of new steel strip plates.
Howard F. Curren Digester No. 5 Floating Cover Rehabilitation
Greeley and Hansen
City of Tampa