CORROSION RATE ANALYSIS AND REMAINING LIFE ASSESSMENT OF ATMOSPHERIC HYDROCARBON STORAGE TANK IN PETROLEUM PROCESSING FACILITIES

Emirsyach Marchio Zhafiri Rahman (Universitas Negeri Yogyakarta)
Rahmat Widodo (Center for Human Resources Development for Oil and Gas (PPSDM MIGAS))
Virda Hersy Lutviana Saputri ((Scopus ID: 57190259126), Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, Indonesia)

JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN
Vol. 11 No. 1 (2026)

This study was conducted to analyze the corrosion rate and Remaining Life Assessment (RLA) of an atmospheric storage tank in a petroleum processing facility using Ultrasonic Thickness Meter (UTM) measurement data. The analysis was complemented by a Root Cause Analysis (RCA) employing the Ishikawa Fishbone Diagram approach and a Risk-Based Inspection (RBI) evaluation to provide optimal inspection recommendations. Based on the calculation results, the tank has been in service since 1984; however, its structural condition remains within an acceptable and safe operating range. The RCA results indicate that corrosion on the tank shell is caused by a combination of technical and non-technical factors. The calculated risk level places the tank in the medium-risk category. Overall, the structural integrity of the tank can still be considered suitable for continued operation.