The pipe coating will last for several decades, but the operating life depends of many factors: the replacement pipe material, the coating material, the usage and maintenance of the pipeline as well as how the coating rehabilitation was performed. On average, with normal use and with pipe coating rehabilitation done properly, Relining Groups spray pipe coating will last for several decades. To date, we’ve determined that most polyurethane or polyurea projects will last between 30 and 50 years, or about the same amount of longevity you could expect from having all the pipes replaced with new ones.