Azizah, Salsabila Puti Maharani (2024) Analisis Risiko Dengan Metode Risk Based Inspection API 581 Yang Dikustomisasi Dengan Analytical Hierarchy Process Pada Unit Bioreaktor Di Lingkungan H2S Di PT.X. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Pada industri minyak dan gas tentunya memiliki berbagai peralatan yang digunakan untuk menghasilkan dan mengolah sumber energi. Dalam proses produksinya, untuk menghindari adanya risiko kerusakan atau kegagalan pada peralatan migas perlu dilakukannya manajemen inspeksi. Manajemen inspeksi dilakukan berdasarkan metode risk-based inspection sesuai dengan standar API 581. RBI (Risk-Based Inspection) adalah suatu metode untuk merancang program inspeksi berdasarkan risiko kegagalan peralatan. Pendekatan RBI yang dilakukan bisa menggunakan kualitatif, kuantitatif, dan semi-kuantitatif, begitu juga yang diterapkan pada PT. X. Namun, metode RBI API 581 dianggap terlalu umum, karena belum tentu bisa menentukan risiko dengan tepat berdasarkan dari kondisi berbagai industri yang berbeda-beda. Maka dari itu, perlu diadakannya kustomisasi RBI sesuai dengan kondisi PT. X menggunakan analytical hierarchy process (AHP). Analytical hierarchy process adalah
proses pengambilan keputusan dari para engineer yang bekerja pada PT. X. Analisis RBI yang dikustomisasi dengan AHP ini digunakan pada unit bioreaktor yang berada pada lingkungan H2S. Dalam analisis risk-based inspection penentuan kriteria probability of failure dan consequence of failure diperlukan untuk mengetahui kemungkinan risiko yang terjadi pada unit bioreaktor. Berdasarkan API 581, bioreaktor memiliki tiga damage mechanism yaitu
thinning, external corrosion, dan polythianic acid stress corrosion cracking. Pada proses perhitungan melibatkan kuantitatif dan kustomisasi. Hasil perhitungan kuantitatif pada DF menghasilkan nilai thinning 0,1, external corrosion 0,0023, dan PASCC 0 sehingga total nilai DF adalah 0,1023. Pada perhitungan COF, terdapat dua konsekuensi yaitu area sebesar 0,03 m2 dan finansial sebesar 229635.95. Pada perhitungan kustomisasi, pada PoF yang memiliki enam faktor, masing-masing memiliki bobot yang berbeda; RLF memiliki nilai 0,093, DF dibagi menjadi tiga yaitung thinning 0,177, external corrosion 0,077, dan PASCC 0,028, IF memiliki nilai 0,125, CCF memiliki nilai 0,190, PF memiliki nilai 0,262, dan MDF memiliki nilai 0,047. Sedangkan pada CoF, konsekuensi area memiliki bobot 0,273 dan finansial memiliki bobot 0,727. Setelah menemukan bobot risiko dari PoF dan CoF dilakukan akumulasi sehingga mendapatkan nilai PoF sebesar 0,66 dan CoF sebesar 2,454. Pemetaan tingkat risiko dilakukan pada perhitungan kuantitatif dan perhitungan kustomisasi sebagai perbandingan. Terdapat perbedaan nilai yang lebih rendah pada perhitungan kustomisasi yang menunjukkan nilai tersebut lebih akurat karena sesuai dengan kondisi aktual pada PT. X.
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The oil and gas industry certainly has a variety of equipment used to produce and process energy sources. In the production process, to avoid the risk of damage or failure of oil and gas equipment, it is necessary to carry out inspection management. Inspection management is carried out based on the risk-based inspection method in accordance with API 581 standard. RBI (Risk-Based Inspection) is a method for designing inspection programs based on the risk of equipment failure. The RBI approach taken can use qualitative, quantitative, and semi-quantitative, as well as those applied at PT X. However, the API 581 RBI method is considered too general, because it is not necessarily able to determine the risk appropriately based on the conditions of various different industries. Therefore, it is necessary to customize RBI according to the conditions of PT. X using analytical hierarchy process (AHP). Analytical
hierarchy process is a decision-making process of engineers who work at PT. X. RBI analysis customized with AHP is used in the bioreactor unit which is in the H2S environment. In the risk-based inspection analysis, determining the probability of failure and consequence of failure criteria is needed to determine the possible risks that occur in the bioreactor unit. Based on API 581, the bioreactor has three damage mechanisms: thinning, external corrosion, and
polythianic acid stress corrosion cracking. The calculation process involves quantitative and customization. The quantitative calculation results in a DF value of 0.1 thinning, 0.0023 external corrosion, and 0 PASCC so that the total DF value is 0.1023. In the COF calculation, there are two consequences, namely an area of 0.03 m2 and a financial value of 229635.95. In the customization calculation, in PoF which has six factors, each has a different weight; RLF has a value of 0.093, DF is divided into three namely thinning 0.177, external corrosion
0.077, and PASCC 0.028, IF has a value of 0.125, CCF has a value of 0.190, PF has a value of 0.262, and MDF has a value of 0.047. While in CoF, the consequence area has a weight of 0.273 and financial has a weight of 0.727. After finding the risk weight of PoF and CoF, the accumulation is carried out so as to get a PoF value of 0.66 and CoF of 2.454. Risk level mapping is carried out on quantitative calculations and customization calculations for comparison. There is a lower value difference in the customization calculation which shows
that the value is more accurate because it is in accordance with the actual conditions at PT X.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Analytical Hierarchy Process, Bioreaktor, Mekanisme Kerusakan, Risk-Based Inspection |
| Subjects: | T Technology > T Technology (General) > T174.5 Technology--Risk assessment. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Salsabila Puti Maharani Azizah |
| Date Deposited: | 02 Aug 2024 08:08 |
| Last Modified: | 02 Aug 2024 08:08 |
| URI: | http://repository.its.ac.id/id/eprint/110496 |
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