Mahadi, Galih (2025) Analisis Pengaruh Variasi Kemiringan Stinger dan Ketinggian Roller terhadap Tegangan Pipa Crude Oil Bawah Laut saat Pemasangan menggunakan Metode S-Lay di Perairan Barat Laut Jawa. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini dilatarbelakangi pentingnya keamanan operasional pada instalasi pipa bawah laut metode S-Lay di Perairan Barat Laut Jawa, dengan tujuan mengidentifikasi konfigurasi optimal sudut kemiringan stinger dan ketinggian roller agar tegangan maksimum di area overbend dan sagbend tidak melampaui batas aman menurut standar DNV OS-F101. Menggunakan simulasi numerik dengan perangkat lunak Orcaflex, dilakukan analisis terhadap tiga konfigurasi sudut stinger (13,3°; 8,84°; 4,48°) dengan masing-masing diuji melalui sepuluh variasi ketinggian roller berdasarkan data lingkungan aktual, karakteristik teknis pipa, dan parameter operasional barge. Penelitian ini menganalisis pengaruh variasi kemiringan stinger dan ketinggian roller terhadap nilai dan lokasi tegangan terbesar yang dialami pipa pada daerah overbend dan sagbend saat instalasi dengan variasi kemiringan stinger dan ketinggian roller. Hasil penelitian merekomendasikan konfigurasi optimal sudut stinger 8,84° dengan ketinggian roller variasi ke-6, karena menghasilkan tegangan Von Misses Stress yang paling stabil dan aman, yaitu 365,906 MPa, jauh di bawah batas allowable stress (391,5 MPa), sehingga efektif meminimalkan risiko overstress dan menjamin efisiensi serta keamanan instalasi pipa bawah laut.
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This study is motivated by the importance of operational safety in subsea pipeline installation using the S-Lay method in the Northwest Java Sea, with the aim of identifying the optimal configuration of stinger angle and roller height so that the maximum stress in the overbend and sagbend areas does not exceed the safe limit according to the DNV OS-F101 standard. Using numerical simulation with Orcaflex software, an analysis was carried out on three stinger angle configurations (13.3°; 8.84°; 4.48°), each tested with ten variations of roller height based on actual environmental data, technical characteristics of the pipeline, and barge operational parameters. The research results recommend the optimal configuration of a stinger angle of 8.84° with the 6th roller height variation, as it produced the most stable and safe Von Misses Stress, which is 365.906 MPa, far below the allowable stress limit (391.5 MPa), thus effectively minimizing the risk of overstress and ensuring efficiency and safety in subsea pipeline installation. This study provides a significant contribution to understanding effective design principles for stinger angle and roller height configuration in the context of S-lay pipeline installation, paving the way for technological advancement in the offshore and oil and gas industry.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Roller, Stinger, Pipelaying , Analisa Tegangan ===================================================================================================================================================== Roller, Stinger, Pipelaying , Stress Analysis |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ930 Pipelines (General). Underwater pipelines. |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Galih Mahadi |
| Date Deposited: | 04 Aug 2025 12:09 |
| Last Modified: | 04 Aug 2025 12:09 |
| URI: | http://repository.its.ac.id/id/eprint/127252 |
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