Fyandika, Bagus (2020) Analisis Inspeksi Berbasis Risiko untuk Corrosion Under Insulation (CUI) Piping di Storage and Loading Area PT X. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Salah satu korosi yang disebabkan oleh lingkungan adalah Corrosion Under Insulation (CUI). CUI didefinisikan sebagai korosi eksternal perpipaan yang terjadi ketika air terjebak di bawah insulasi. CUI terjadi ketika air atau uap air terjebak di dalam insulasi pipa dan menyebabkan terjadinya korosi pada pipa yang terinsulasi. Kerusakan CUI berupa korosi eksternal terlokalisasi pada carbon and low alloy steels. Dampak dari kejadian ini memicu banyak pihak untuk menetapkan beberapa aturan untuk memanajemen kerusakan akiba CUI. PT X melaksanakan inspeksi berkala untuk pemantauan CUI berdasarkan pada dokumen nomor OP / INS / BP-33 / 99-228, dimana survei CUI dilakukan sebagai inspeksi berbasis waktu setiap lima tahun dan setiap sistem perpipaan dilakukan inspeksi dengan cara yang sama. Ini membuat semua peralatan dan sistem perpipaan yang terdaftar rentan terhadap risiko kegagalan CUI dengan diperiksa tanpa mempertimbangkan faktor risiko dari masing-masing objek. Strategi ini dinilai kurang efektif karena risiko kegagalan CUI pada peralatan tertentu dapat berbeda satu sama lain. Maka dari itu diperlukan analisa berbasis resiko agar kegiatan inspeksi bisa lebih terfokus dan sesuai prioritas. Untuk membuat strategi dan kegiatan inspeksi lebih tepat, PT X mulai melakukan inspeksi berdasarkan kondisi dan risiko dari komponen terkait. Metode yang cocok digunakan adalah Risk-Based Inspection (RBI), yang telah dijelaskan secara sistematis pada API RP 581. Risiko komponen dihitung dari probabilitas dan konsekuensi kegagalan komponen. Sedangkan, untuk parameter perencanaan inspeksi ditetapkan dengan target risiko sebesar 3.72 m2/tahun. Target risiko sendiri berguna untuk mengetahui batas maksimal hasil Analisa risiko dapat diterima atau tidak. Dari hasil analisa yang telah dilakukan menunjukkan 5 dari 10 piping yang dianalisa sudah melebihi target risiko dan disarankan agar dilakukan inspeksi sesegera mungkin.
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One of the corrosion caused by the environment is Corrosion Under Insulation (CUI). CUI is defined as external piping corrosion that occurs when water is trapped under insulation. CUI occurs when water or water vapor is trapped inside the pipe insulation and causes corrosion of the insulated pipe. CUI damage in the form of external corrosion is localized to carbon and low alloy steels. The impact of this incident triggered many parties to set some rules for managing the damage to the CUI. PT X conducts periodic inspections for CUI monitoring based on document number OP / INS / BP-33 / 99-228, where the CUI survey is carried out as a time-based inspection every five years and each piping system is inspected in the same manner. This makes all equipment and piping systems listed vulnerable to the risk of failure of the CUI by being checked without considering the risk factors of each object. This strategy is considered ineffective because the risk of CUI failure on certain equipment may differ from one another. Therefore a risk-based inspection analysis is needed so that inspection activities can be more focused and according to priority. To make the inspection strategy and activities more appropriate, PT X began to conduct inspections based on the conditions and risks of the related components. The suitable method used is Risk-Based Inspection (RBI), which has been explained systematically in API RP 581. Component risk is calculated from the probability and consequences of component failure. Meanwhile, the inspection planning parameters are set with a risk target of 3.72 m2 / year. The risk target itself is useful to know the maximum limit of the results. Risk analysis is acceptable or not. The analysis shows that 5 out of 10 piped analyzed have exceeded the risk target and it is recommended that inspection be carried out as soon as possible.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Corrosion Under Insulation, Piping, Risk Based Inspection |
| Subjects: | T Technology > T Technology (General) > T174.5 Technology--Risk assessment. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Bagus Fyandika |
| Date Deposited: | 23 Aug 2020 07:25 |
| Last Modified: | 20 Dec 2023 08:47 |
| URI: | http://repository.its.ac.id/id/eprint/80686 |
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