Emmanuella, Clara Lourdessa Oryza (2023) Kustomisasi Pendekatan Kuantitatif Risk-Based Inspection Menggunakan Analytical Hierarchy Process untuk Perencanaan Inspeksi Bejana Tekan Unit Amina di Kilang LNG. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dalam menjaga aset kilang minyak dan gas, banyak perusahaan mengimplementasikan metode risk-based inspection (RBI) untuk menganalisis risiko dan merencanakan program inspeksi peralatan. Namun, penerapan RBI di PT X sesuai standar umum masih memerlukan validasi penilaian subjektif ahli dalam bentuk diskusi sehingga diperlukannya kustomisasi berdasarkan kebutuhan perusahaan. Kustomisasi pendekatan kuantitatif mengintegrasikan metode kuantitatif, semi-kuantitatif, dan kualitatif, wawancara ahli, dan metode analytical hierarchy process (AHP) yang memberikan bobot pada faktor risiko. Mekanisme kerusakan yang terjadi adalah thinning, external chloride stress corrosion cracking, external corrosion, dan external corrosion under insulation chloride stress corrosion cracking. Analisis probabilitas dilakukan dengan mempertimbangkan kriteria Remaining Life, Damage, Process, Mechanical Design, Inspection, dan Current Condition Factor. Analisis konsekuensi dilakukan dengan perhitungan kuantitatif konsekuensi area dan finansial. Perhitungan kuantitatif Damage Factor menghasilkan 0,1214 (kepala atas dan badan), 0,1812 (kepala bawah) dan 0,1352, 0,2695 untuk CO2 absorber, 6,5306 dan 46,2552 untuk amine regenerator, serta 46,04793 dan 182,3808 untuk amine regenerator overhead accumulator pada RBI dan plan date secara berurutan. Sementara perhitungan konsekuensi menghasilkan 25347,2465 m2 dan Rp10 triliun untuk CO2 absorber, 13,4868 m2 dan Rp92 miliar untuk amine regenerator, serta 13,4868 m2 dan Rp92 miliar untuk amine regenerator overhead accumulator. Metode kustomisasi RBI menghasilkan bobot faktor PoF senilai 0,219 (RLF), 0,174 (CCF), 0,205 (IF), 0,196 (DF thinning), 0,096 (DF external damage), 0,052 (MDF), dan 0,059 (PF), sementara faktor CoF senilai 0,344 (area) dan 0,656 (finansial). Perbandingan hasil metode kuantitatif dan kustomisasi menunjukkan kategori risiko CO2 absorber yang meningkat dari medium ke medium high, amine regenerator yang menurun dari medium high ke medium, dan amine regenerator overhead accumulator yang menurun dari medium high ke medium. Tanggal inspeksi yang direkomendasikan adalah pada tahun 2027 (CO2 absorber) dan 2033 (amine regenerator dan amine regenerator overhead accumulator).
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In maintaining the optimum condition of an oil and gas plant, most companies implement the risk-based inspection (RBI) method in analyzing risk and planning inspection program. However, RBI based on the general standard is identified to still need a validation based on engineering judgement in the form of a discussion at PT X. Hence, customization of the quantitative RBI analysis is developed that integrates quantitative, semi-quantitative, and qualitative methods, and analytical hierarchy process (AHP) that gives a consideration weight of risk factors. The damage mechanisms are thinning, external chloride stress corrosion cracking, external corrosion, and external corrosion under insulation chloride stress corrosion cracking. Probability analysis is conducted by considering six criteria, namely Remaining Life, Damage, Process, Mechanical Design, Inspection, and Current Condition Factor. Consequence analysis is conducted through quantitative calculation of area and finance. The Damage Factor result in 0.1214 (top head and shell), 0.1812 (bottom head) and 0.1352, 0.2695 for the CO2 absorber, 6.5306 and 46.2552 for the amine regenerator, and 46.0479 and 182.3808 for the amine regenerator overhead accumulator. The CoF result in 25347.2465 m2 and IDR 10 trillion for the CO2 absorber, 13.4868 m2 and IDR 92 billion for the amine regenerator, and 13.4868 m2 and IDR 92 billion for the amine regenerator overhead accumulator. The AHP yields factor weights for PoF: 0.219 (RLF), 0.174 (CCF), 0.205 (IF), 0.196 (DF thinning), 0.096 (DF external damage), 0.052 (MDF), and 0.059 (PF), while the CoF factors are 0.344 (area) and 0.656 (financial). A comparison between the methods indicate that the risk category of the CO2 absorber increased from medium to medium-high, amine regenerator decreased from medium- high to medium, and the amine regenerator overhead accumulator decreased from medium-high to medium. The recommended inspection dates are determined as 2027 (CO2 absorber) and 2033 (amine regenerator and amine regenerator overhead accumulator).
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Analytical Hierarchy Process, Risk-Based Inspection, Kuantitatif, Quantitative |
| Subjects: | T Technology > T Technology (General) > T174.5 Technology--Risk assessment. T Technology > T Technology (General) > T55 Industrial Safety T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion T Technology > TA Engineering (General). Civil engineering (General) > TA467 Iron and Steel Corrosion and protection against corrosion T Technology > TP Chemical technology > TP761.L5 Liquefied natural gas T Technology > TS Manufactures > TS283 Pressure vessels. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Clara Lourdessa Oryza Emmanuella |
| Date Deposited: | 24 Jul 2023 07:22 |
| Last Modified: | 24 Jul 2023 07:22 |
| URI: | http://repository.its.ac.id/id/eprint/99118 |
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