Identifying failure factors due to corrosion erosion on pressured steam pipe elbow in geothermal power plant

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.313972

Keywords:

corrosion erosion, elbow pipe, turbulence, tubercles, fibrous fractures, thinning thickness

Abstract

This paper presents the findings of a corrosion erosion failure analysis of elbow pipe materials used to flow high-pressure water from underground. The failed elbow pipe material was above the wellhead forming a straight line in the longitudinal direction with a pipe length of 6200 feet below the ground surface. The working fluid in the elbow pipe was 25 % steam and 75 % water, flowing in the elbow pipe with a media flow rate of 180 tons per hour, a pressure of 22 bar, and a temperature of 220 °C. Elbow tubes were made of low carbon steel with Standard ASTM A234 having an outer diameter of 304.8 mm and a wall thickness of 9.271 mm. Macroscopic testing, chemical composition analysis, metallographic testing, hardness testing, X-ray diffraction testing, SEM, and EDS are a few of the test types conducted. The study's findings showed that the elbow tubes experienced a thinning process on the inner wall of the outer curvature side with a rough and wavy surface texture or appearance. This type of failure is known as erosion-corrosion. The level of erosion-corrosion failure that occurs is greatly influenced by the pH of the fluid being flowed reaching 2.67–2.91, this is due to the very high Cl- of 1290 ppm, so the higher the rate of erosion-corrosion that occurs. These materials are the most popular and widely used in the oil and gas sector. However, this pipe has weaknesses because it is susceptible to erosion-corrosion Therefore, it is very important to choose the right material, namely, a material that is resistant to erosion-corrosion

Author Biographies

Iskandar Muda, Jenderal Achmad Yani University

Doctor of Materials Engineering, Lecturer

Department of Metallurgical and Materials Engineering

Bambang Widyanto, Jenderal Achmad Yani University

Doctor of Materials Engineering, Professor

Department of Metallurgical and Materials Engineering

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Identifying failure factors due to corrosion erosion on pressured steam pipe elbow in geothermal power plant

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Published

2024-10-30

How to Cite

Muda, I., & Widyanto, B. (2024). Identifying failure factors due to corrosion erosion on pressured steam pipe elbow in geothermal power plant. Eastern-European Journal of Enterprise Technologies, 5(12 (131), 13–24. https://doi.org/10.15587/1729-4061.2024.313972

Issue

Vol. 5 No. 12 (131) (2024): Materials Science

Section

Materials Science

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