New international regulation imposing double hull tankers, lead toturn over end of life tankers to FPSO (Floating production StorageOffloading). This raises a problem with the life extension of the unitsthat must account for the new operational conditions. Bureau Veritashas introduced a method to assess the residual life of a tanker andto decide of the necessary modifications and improvements to reachthe new contractual life time. The method is described with the supportof an actual example.