This paper addresses the applicability of Activity Based Costing(ABC) methodology for Life Cycle Cost (LCC) based decision making in refinery facilities. In process plant facilities suffering wet corrosion problem, LCC assessment is quite difficult because the parameters influencing LCC are very complicated and have synergistic effects of both process and metallurgical aspects on facility life. This paper presents the case study of LCC assessment using ABC for Reactor Effluent Air Coolers(REAC) of hydroprocessing units in refineries, which suffer wet ammonium bisulfide(NH4HS) corrosion. As the result of the assessment, it was found that ABC could lead to usable options to support decision making to minimize LCC of REAC by analyzing operation parameters and maintenance activities affecting wet NHnHS corrosion.
Keywords: Life Cycle Costing (LCC), Activity Based Costing (ABC), wet NH4HS corrosion, Reactor Effluent Cooler, Corrosion Monitoring