New international regulation imposing double hull tankers, lead to turn over end of life tankers to FPSO (Floating production Storage Offloading). This raises a problem with the life extension of the units that must account for the new operational conditions. Bureau Veritas has introduced a method to assess the residual life of a tanker and to decide of the necessary modifications and improvements to reach the new contractual life time. The method is described with the support of an actual example.