SPS Technology was asked to provide a permanent repair solution to restore the integrity of a damaged (cracked) area of an FPSO hull structure. Doublers had previously been used to provide a temporary repair of the cracks in the side shell. The design solution was approved by DNV following a structural assessment that included an analysis of crack growth and inspection frequency.
SPS restored structural integrity through the elastomer core transferring loading/stress levels from the existing plate to a new steel top plate therefore ‘bridging the cracks’. SPS partner Marine Offshore Management led the small project team. The repair was undertaken from the inside of the hull eliminating the need for cofferdam and dive boat. The new 12mm top plate was welded to the framing members with the SPS elastomer core injected into the resulting cavity to form the composite sandwich.
The FPSO was able to remain on-station and in production. SPS reduced risk to personnel, structure and schedule.