Feasibility Analysis of Thermal Oxidizer to Determine Remaining Life Using Fitness- for-Service Level 3 Method

Authors

• Yudhi Yudistirawan, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, IndonesiaFollow
• Donanta Dhaneswara, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, IndonesiaFollow
• Wahyuaji Narottama Putra, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, IndonesiaFollow
• Gama Widyaputra, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, IndonesiaFollow
• Dewi Kurnia Suci, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, IndonesiaFollow
• Agung Putra Mahardhika, Operations & Surface Facility, PEPC Zona 11, Surabaya, East Java 60271, IndonesiaFollow

Abstract

An aged thermal oxidizer (TOX) in the oil and gas industry necessitates a comprehensive evaluation to ensure its continued safe operation. This study presents a Remaining Life Assessment (RLA) and a Fitness for Service (FFS) evaluation for the four main components of the TOX, in accordance with API 510, API 579/ASME FFS-1, and ASME BPVC Section VIII Div-1 standards. The investigation includes the determination of maximum stress and maximum temperature required to assess the operational viability of the reactor. The four components are radiant, convection, transition, and stack sections—were modeled using the finite element method (FEM). Following the geometric modeling, an FFS evaluation was conducted based on two criteria: stress and temperature, to ascertain whether the TOX remains safe and operational until the end of its service life. Based on the FFS assessment, the TOX structure has been deemed fit to operate and acceptable for use throughout its remaining service life. Subsequently, a remaining life assessment performed on these components indicated an estimated service life of 20 years. According to the analyses carried out, the maximum stress observed is 160 MPa in the radiant section, while the highest temperature, recorded at 392 °C, occurs in the convection and transition sections. These results indicate that the radiant area particularly the upper radiant component, poses the highest risk due to the stress concentrations at its peak levels. In conclusion, although the TOX system is currently operating safely, periodic inspections are essential to ensure its continued secure operation until the end of its remaining service life.

References

API 2016, API 570: Piping inspection code – in-service inspection, rating, repair, and alteration of piping systems, American Petroleum Institute, Washington.

API 2021, API 579-1/ASME FFS-1: Fitness-for-service, American Petroleum Institute, Washington.

API 2023, API RP 982: Inspection and assessment of refractory linings, American Petroleum Institute, Washington.

ASCE 2017, ASCE 7-22: Minimum design loads and associated criteria for buildings and other structures, American Society of Civil Engineers, Reston.

ASTM 2019, ASTM A36/A36M-19: Standard specification for carbon structural steel, ASTM International, West Conshohocken.

Bakhtiari, S 2017, Fitness-for-service assessment of a fire-damaged pressure vessel in a refinery unit, Engineering Failure Analysis, vol. 79, pp. 606–616, Elsevier.

Bohra, H & Guzey, S 2020, Fitness-for-service of open-top storage tanks subjected to differential settlement, Engineering Structures, vol. 225, 111277, Elsevier.

Center for Chemical Process Safety 2017, Guidelines for asset integrity management, John Wiley & Sons, Inc., New Jersey.

Dwiyati, Y S & Santosa, T 2015, ‘Korosi H₂S dan CO₂ pada peralatan statik di industri minyak dan gas’, Jurnal Konversi Energi dan Manufaktur, vol. 2, no. 1, pp. 18–22.

Gandy, D 2007, Carbon steel handbook, Electric Power Research Institute, Palo Alto.

Hadi, A 2008, Assessment hasil inspeksi menggunakan fitness-for-service pada fasilitas produksi oil dan gas line di lepas pantai Laut Jawa, tesis, Universitas Indonesia, Depok.

Hutton, D V 2004, Fundamentals of finite element analysis, McGraw-Hill, New York.

Inspectioneering 2022, A guide to wet H₂S damage management, Inspectioneering, Texas.

Kementerian Energi dan Sumber Daya Mineral Republik Indonesia 2025, Outlook energi Indonesia 2025, Kementerian ESDM, Jakarta.

Martello, G 2016, ‘Discretization analysis in FEM models’, EDP Sciences, Brescia, p. 53.

Nugroho, B S & Pratama, M A 2024, ‘Assessment of thermal oxidizer performance efficiency’, Catalyx: Journal of Process Chemistry and Technology, vol. 1, no. 2, pp. 83–96.

Satyam, S, Khan, A & Khare, G 2023, ‘A comprehensive review on current trends, applications and future directions of finite element methods’, Journal of Emerging Technologies and Innovative Research, vol. 10, no. 8, pp. e410–e414.

Purwidyasari, S P & Kusuma, A I 2023, ‘Estimating remaining life and fitness-for-service evaluation of fuel piping systems’, Journal of Materials Exploration and Findings, issue 1.

Zangeneh, S 2021, ‘Fitness-for-service assessment and failure analysis of hydrogen-induced cracking in a pipeline steel’, Journal of Failure Analysis and Prevention, pp. 1875–1887.

Zienkiewicz, O C, Taylor, R L & Zhu, J Z 2013, The finite element method: its basis and fundamentals, 7th edn, Elsevier Ltd., Amsterdam.

Recommended Citation

Yudistirawan, Yudhi; Dhaneswara, Donanta; Putra, Wahyuaji Narottama; Widyaputra, Gama; Suci, Dewi Kurnia; and Mahardhika, Agung Putra (2026) "Feasibility Analysis of Thermal Oxidizer to Determine Remaining Life Using Fitness- for-Service Level 3 Method," Journal of Materials Exploration and Findings: Vol. 5: Iss. 1, Article 4.
DOI: 10.7454/jmef.v5i1.1115
Available at: https://scholarhub.ui.ac.id/jmef/vol5/iss1/4