Pipe failure and leakage is a problematic issue and the traditional solution of replacing the pipes is costly and time consuming. Rehabilitation by relining materials based on polymer composites is an alternative solution towards the degradation problem of the old piping. This study provides an investigation of relined pipes which have been in the field between one to ten years to evaluate the quality and performance of the rehabilitation methods as well as typical problems which can occur. The investigated samples were sent to the laboratory for investigation and since they were not randomly taken out, the notations in this study should not be an indication of relining performance in general. However it can be said with certainty that improvement in technology is needed which is the reason of our study.
Moreover this study includes some of degradation analyses on the two composite materials used for rehabilitation by polymer materials including Epoxy and Polyester composites.