Teekay Foam's Overboard Discharge Sea Pipe Repaired

Monday, April 22, 2002
When Teekay Foam established a water leak within the internal pipe of the scrubber overboard system, UMC was called in to provide an efficient solutions. The leak was between the sea valve and the aperture, and a concrete box had been previously installed to temporarily resolve the situation. UMC's repair squad attended the vessel upon its arrival at Bilbao equipped for two possible solutions, which had been previously discussed and agreed with Teekay Shipping. One solution was to crop out the section of hull around the aperture and insert a new plate containing a stub pipe as per UMC's class approved permanent insert procedure. The other was to crop the pipe internally and refit a new section. Both methods were reliant upon the fitting of a UMC cofferdam, by the diving team, externally over the scrubber overboard aperture thus rendering inboard as watertight. Once in place, the existing concrete box could be removed and diagnosis could begin. It was subsequently established that the water leak in the pipe was, in fact, inboard and that the pipe could therefore be removed and a new section reinstated using full penetration TIG root pipe welding techniques. On completion of the welding the internal and external walls of the 250 mm diameter pipe were also coated as per the client's specification. All work was carried out to the satisfaction of the attending DNV surveyor and within the vessels scheduled time in port for cargo operations.
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