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All Journal Equivalent: Jurnal Ilmiah Sosial Teknik
Wandi Pagar Asi Napitupulu
Institut Teknologi Sepuluh Nopember
Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences

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Failure Analysis of High Pressure Shaft Pump Sea Water Reverse Osmosis in the Labuhan Angin Generation Business Unit Wandi Pagar Asi Napitupulu; Fahmi Mubarok
Equivalent: Jurnal Ilmiah Sosial Teknik Vol. 8 No. 4 (2026): Equivalent: Jurnal Ilmiah Sosial Teknik
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jequi.v8i4.421

Abstract

Background: UBP Labuhan Angin relies on the high-pressure (HP) pump in the seawater reverse osmosis system to maintain the availability of boiler feedwater and the readiness of the power plant. Repeated shaft failures may disrupt the water-treatment process and compromise the reliability of electricity generation. Objective: This study analyzed the factors contributing to the failure of the HP pump shaft at UBP Labuhan Angin. Methods: The study employed chemical composition testing, macrographic and micrographic examinations, scanning electron microscopy, and Vickers hardness testing. Results: The findings showed that the hardness values of Materials A and B were nonuniform and lower than the reference value for AISI 440A. Material A had a lower carbon content, whereas Material B had a lower chromium content than the specified ranges. Fractographic and microstructural observations indicated brittle fracture, crack initiation in the central area, chromium carbide precipitation, and nonuniform effects of heat treatment. Conclusion: The shaft failure was associated with deviations in chemical composition, insufficient and nonuniform hardness, brittle fracture characteristics, and an inappropriate heat-treatment process, which reduced the material's resistance to cyclic operational loads.
Co-Authors Fahmi Mubarok