The aim of this study is to establish an assessment method to assess the integrity of the degraded lines and to establish a mitigation or repair plan on deficiency of the 30" rich diglycolamine (RDGA) at gas processing plant. There are four lines of 30" diameter, transporting RDGA from the feed gas separation unit, gas sweetening and condensate stabilization, into the solvent regeneration. The scope of work of the candidate is limited to review the construction, testing and commissioning procedure for piping, operational history, performing evaluation of defects by the phased array ultrasonic testing, under consideration of operating conditions and evaluation of the repair method used on the RDGA line in terms of material selection, and perform fitness for service assessment. Based on this assessment study and proposed repair methods, these RDGA lines are fit for service to operate within their operating parameters and permanent repair should be in place by 2024.