Chapter 16. Optimizing the Inspection of Corrosion Under Insulation in Badak LNG Plant by the Implementation of Risk-Based Method Available to Purchase

Corrosion-Under-Insulation (CUI) remains as one of major problem within Badak LNG plant, as equipment failure due to this phenomenon contributes to lots of material damages and losses of process fluids. It has led the company to establish several inspection strategies to mitigate the corrosion which attacks the insulated equipment and piping systems. Within its operational years, Badak LNG had sequentially implemented both condition-based monitoring and time-based action as the way to combat CUI. Recently, the company proposed a well-known risk-based inspection (RBI) as an adaptive yet reactive method to manage the shortcomings of both previous strategies. This is intended to optimize the inspection of vulnerable assets to CUI failure as the method could help ‘better’ in determining which equipment and its specific locations that prone to fail due to CUI. RBI allows integrity engineers to ‘choose’ the inspection effectiveness based on the optimization among several criteria: budget availability for inspection and maintenance, plant operational status, specific time and duration for inspection and also risk tolerance. Hence, RBI could optimize the inspection program for CUI within Badak LNG plant, as it helps prioritizing the selection of vulnerable equipment based on its risk of failure.