Biyandhika, Beltham Malvino (2024) ANALISIS RISIKO UNIT ABSORBER COLUMN PADA LINGKUNGAN CO2 DENGAN METODE RISK BASED INSPECTION API 581 YANG DIKUSTOMISASI DENGAN ANALYTICAL HIERARCHY PROCESS DI PT. XYZ. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada perusahaan yang berkaitan dengan gas bumi tentunya memiliki peralatan yang dapat melakukan proses absorpsi untuk memisahkan gas asam menjadi sweet gas termasuk PT XYZ dengan peralatan absorber column. Untuk melakukan inspeksi pada peralatan absorber column diperlukan metode yang digunakan yaitu risk based inspection (RBI), tetapi seringkali terkendala karena kurang sesuainya kondisi pada perusahaan. Oleh karena itu, diperlukan suatu metode kustomisasi yang sesuai dengan keadaan PT XYZ. Kustomisasi dilakukan dengan menggabungkan unsur pendekatan kuantitatif, kualitatif, semi-kuantitatif, dan perancangan program inspeksi berdasarkan hasil kustomisasi. Perencanaan program inspeksi dilakukan berdasarkan hasil kategori risiko dan sisa umur peralatan, absorber column perlu dilakukan inspeksi kembali empat tahun kedepan setelah inspeksi terakhir yaitu tahun 2026. Berdasarkan API 581, peralatan absorber column memiliki lima mekanisme kerusakan yaitu thinning, external corrosion, amine cracking, sulfide stress cracking, dan H2S cracking. Perhitungan kuantitatif nilai DF pada kedua bagian shell dan head absorber column mendapatkan nilai thinning 0,1, external corrosion 0,039 dan 0,042, amine cracking 0, sulfide stress cracking 0, dan H2S cracking 13,9808 dan 13,9808 dengan total DF sebesar 14,120. Perhitungan COF mendapatkan hasil pada area sebesar 0,188 m2 dan finansial sebesar $158360,73. Faktor POF dibobotkan menghasilkan nilai RLF 0,086, nilai DF thinning 0,080, nilai DF external corrosion 0,047, nilai DF amine cracking 0,021, nilai DF sulfide stress cracking 0,025, nilai DF H2S cracking 0,163, nilai IF 0,116, nilai CCF 0,176, nilai PF 0,242, nilai MDF 0,044. Faktor COF memiliki nilai bobot area sebesar 0,273 dan nilai bobot finansial sebesar 0,727. Kemudian bobot diolah untuk mendapatkan nilai yang telah diintegrasi dengan nilai POF yaitu 1,230 dan nilai COF yaitu 2,454. Perbandingan antara metode kuantitatif dan kustomisasi menunjukkan adanya penurunan kategori pada peralatan absorber column dari moderate menjadi low to moderate. Perbandingan antara dua laju korosi pengujian CO2 dan amina mendapatkan nilai rata-rata laju korosi pada pengujian CO2 lebih besar yaitu 0,264 mm/y – 0,321 mm/y, sedangkan nilai rata-rata laju korosi pada pengujian amina yaitu 0,093 mm/y – 0,227 mm/y. Oleh karena itu terdapat kemungkinan korosi CO2 pada absorber column.
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Companies related to natural gas certainly have equipment that can carry out the absorption process to separate acid gas into sweet gas including PT XYZ with absorber column equipment. To inspect the absorber column equipment, the method used is risk-based inspection (RBI), but it is often constrained due to the lack of suitable conditions in the company. Therefore, a customization method is needed that suits the circumstances of PT XYZ. Customization is done by combining elements of quantitative, qualitative, semi-quantitative approaches, and designing inspection programs based on the results of customization. Inspection program planning is carried out based on the results of the risk category and the remaining life of the equipment, the absorber column needs to be inspected again four years in the future, namely in 2026. Based on API 581, the absorber column equipment has five damage mechanisms, namely thinning, external corrosion, amine cracking, sulfide stress cracking, and H2S cracking. Quantitative calculation of DF values in the shell and head of the absorber column obtained thinning values of 0.1 and 0.1, external corrosion 0.039 and 0.042, amine cracking 0, sulfide stress cracking 0, and H2S cracking 13.9808 and 13.9808 with a total DF of 14.120. The COF calculation resulted in an area of 0.188 m2 and a financial cost of $158360.73. The weighted POF factor results in an RLF value of 0.086, DF thinning value of 0.080, DF external corrosion value of 0.047, DF amine cracking value of 0.021, DF sulfide stress cracking value of 0.025, DF H2S cracking value of 0.163, IF value of 0.116, CCF value of 0.176, PF value of 0.242, MDF value of 0.044. The COF factor has an area weight value of 0.273 and a financial weight value of 0.727. Then the weight is processed to get an integrated value with a POF value of 1.230 and a COF value of 2.454. Comparison between quantitative and customized methods shows a decrease in the category of absorber column equipment from moderate to low to moderate. Comparison between the two corrosion rates of CO2 and amine testing found that the average value of the corrosion rate in CO2 testing is greater, namely 0.264 mm/y - 0.321 mm/y, while the average value of the corrosion rate in amine testing is 0.093 mm/y - 0.227 mm/y. Therefore, there is a possibility of CO2 corrosion in the absorber column.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Analytical Hierarchy Process, Absorber Column, Risk Based Inspection, Weight Loss, Analytical Hierarchy Process, Absorber Column, Risk Based Inspection, Weight Loss |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Beltham Malvino Biyandhika |
| Date Deposited: | 09 Aug 2024 08:36 |
| Last Modified: | 09 Aug 2024 08:36 |
| URI: | http://repository.its.ac.id/id/eprint/112712 |
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