PANDUWINATA, DICKY (2025) ANALISIS KOROSI PADA PIPA CARBON STEEL A 106 MENGGUNAKAN METODE GETARAN. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Corrosion Corrosion is a process of metal degradation that can lead to a reduction in structural integrity and system efficiency, particularly in the oil and gas industry. One of the materials susceptible to corrosion is A-106 carbon steel pipe, which is commonly used as a medium for transporting corrosive fluids. This study aims to analyze corrosion in A-106 carbon steel pipes using a vibration-based method as an alternative to conventional methods that are often expensive and complex. The method applied is the Fast Fourier Transform (FFT) Analyzer, which can efficiently and economically detect frequency changes in vibrations caused by corrosion. Testing was carried out through a bump test and pressurized fluid flow test at 9 psi on both corroded and noncorroded pipes. The results showed that corroded pipes exhibited significantly different frequency characteristics, with frequencies starting from 4 Hz, whereas noncorroded pipes started from 8 Hz. This difference resulted in a damping ratio of 0.25 for non-corroded pipes, while in corroded pipes it increased to 0.5. In addition, fluid pressure was found to influence the increase in damping and vibration amplitude. This study demonstrates that the FFT Analyzer method can serve as an effective alternative for detecting corrosion in industrial piping systems. Keywords: Corrosion, Vibration, FFT Analyzer, Fluid Flow, A-106 Carbon Steel Pipe. Korosi merupakan proses degradasi logam yang dapat mengakibatkan penurunan integritas struktural dan efisiensi sistem, terutama pada industri minyak dan gas. Salah satu material yang rentan terhadap korosi adalah pipa carbon steel A-106, yang sering digunakan sebagai media penyalur fluida korosif. Penelitian ini bertujuan untuk menganalisis korosi pada pipa carbon steel A-106 menggunakan metode getaran, sebagai alternatif dari metode konvensional yang cenderung mahal dan kompleks. Metode yang digunakan adalah Fast Fourier Transform (FFT) Analyzer yang mampu mendeteksi perubahan frekuensi getaran akibat adanya korosi secara efisien dan ekonomis. Pengujian dilakukan melalui bump test dan uji aliran fluida bertekanan 9 psi pada pipa korosi dan non-korosi. Hasil pengujian menunjukkan bahwa pipa yang mengalami korosi memiliki jumlah frekuensi yang berbeda signifikan dibandingkan, dimana frekuensi pada pipa karat dimulai dari 4 Hz sedangkan non karat dimulai dari 8 Hz. Hal ini menyebabkan rasio redaman pipa non karat sebesar 0,25 sedangkan pada pipa karat naik menjadi 0,5. Selain itu, tekanan fluida turut mempengaruhi peningkatan redaman dan amplitudo getaran. Penelitian ini menunjukkan bahwa metode FFT Analyzer dapat digunakan sebagai metode alternatif yang efektif untuk mendeteksi korosi pada sistem perpipaan industri. Kata Kunci: Korosi, Getaran, FFT Analyzer, Aliran Fluida, Pipa Carbon Steel A-106.
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