• Gatot Prayogo Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Depok West Java, 16424, Indonesia



Catastrophic, Failure, Oil Filter Machine Bolts


An assessment of the fractured bolt of a cooking oil filter machine was performed. The objective of this assessment is to reveal the root cause of the failure. A series of necessary attempts were carried out for this analysis, i.e., site visit, fracture surface examination of the fractured bolt, collecting the maintenance and operation data, mechanical properties testing, chemical composition testing, and stress analysis. The fracture surface examination showed a catastrophic failure, especially at a repaired bolt. Meanwhile, according to the site visit investigation, some evident data indicated a sudden high-pressure load subjected to the filter machine. Most fractured filter bolts were repaired by welding. The design review shows that the critical operating pressure is around 14.5 bar, which is far above the reported operating pressure during the accident, which is 6 bar. This indicated that the strength of the genuine bolt is sufficient to ensure the operating pressure of the filter machine, which is normally 1 to 3.5 bar. Finally, it can be concluded that the root cause of the failure of the filter machine bolt is decreasing strength of the bolts because of improper repairment indicated by the welding process and assisted by sudden high load due to increasing pressure inside the filter vessel.


Download data is not yet available.


Operation, Maintenance, and Chronological Accident Report of Oil Filter Machine. 2014.

ASM Metals Handbook Volume 11, Failure Analysis and Prevention. 2002, Materials Park Ohio.

Nishida, S.-I., Failure Analysis in Engineering Applications, ed. F. edition. 1992: Butterwort-Heinemann.

Keith, M.R., Root Cause Failure Analys. 1999: Butterworth-Heinemann.

Molaei, S., et al., A failure analysis study on the fractured connecting bolts of a filter press. Case Studies in Engineering Failure Analysis, 2015. 4: p. 26-38.

Choi, J. and B. Kim, Failure analysis of anchor bolt of rail fastening system for direct fixation track. Engineering Failure Analysis, 2020. 112.

Valles González, P., A. Pastor Muro, and M. García-Martínez, Failure analysis study on a fractured bolt. Engineering Failure Analysis, 2020. 109.

Krishnaraj, N., P.B. Srinivasan, and V. Muthupandi, Investigation of a Mounting Bolt Failure in an Automobile Air Brake Assembly. ASM International, 2003. 3(5): p. 69-72.

Li, Y., et al., Failure analysis of bolts on fatigue test bench for excavator stick. Engineering Failure Analysis, 2020. 118.

Shafiei, A. and H. Kazempour-Liasi, Failure analysis of gas turbine torque tube bolts. Engineering Failure Analysis, 2021. 124.

Moshayedi, H., M. Moattari, and K. Azizpour, Failure analysis of outer casing bolts of a 325 MW steam turbine. Engineering Failure Analysis, 2019. 97: p. 189-200.

Callister, W.D., Materials Science and Engineering, An Introduction. John Wiley & Sons, Inc.

Lebang, T.M., Analisa Tegangan Baut Leaf Filter Untuk Minyak Kelapa Sawit, in Mechanical Engineering Department. 2017, Universitas Indonesia: Depok, Indonesia.

Williams, J.G., et al., analysis of externally loaded bolted joints: Analytical, computational and experimental study. International Journal of Pressure Vessels and Piping, 2009. 86(7): p. 420-427.

Savković, M., et al., analysis of the drive shaft fracture of the bucket wheel excavator. Engineering Failure Analysis, 2012. 20: p. 105-117.

Jiang, S.L., Y.G. Zheng, and D.L. Duan, Failure analysis on weld joints between the elbow and straight pipes of a vacuum evaporator outlet. Engineering Failure Analysis, 2013. 27: p. 203-212.




How to Cite

Prayogo, G. (2023). CATASTROPHIC FAILURE INVESTIGATION OF THE OIL FILTER MACHINE BOLTS. Indonesian Journal of Engineering and Science, 4(1), 035–043.