Sibuea, Clinton (2016) Analisis On-Bottom Stability Dan Local Buckling : Studi Kasus Pipa Bawah Laut Dari Platform ULA Menuju Platform UW. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pipa bawah laut merupakan suatu teknologi transportasi yang digunakan untuk mengangkut produk hidrokarbon. Industri minyak dan gas telah membuktikan bahwa penggunakan pipa bawah laut merupakan cara yang paling ekonomis untuk memindahkan fluida dalam skala besar. Pada penelitian ini, dilakukan analisis on-bottom stability dan local buckling pada pipa bawah laut dari platform ULA menuju platform UW milik PT.PHE ONWJ. Analisis on-bottom stability bertujuan untuk mengetahui apakah pipa bawah laut stabil secara vertikal dan lateral di dasar laut pada saat terkena beban hidrodinamis. Analisis local buckling bertujuan untuk menentukan panjang maksimum free span yang diijinkan agar pipa tidak mengalami buckling. Besar gaya horizontal pada kondisi instalasi dan operasi masing-masing adalah 405 N/m dan 1119 N/m. Besar gaya vertikal pada kondisi instalasi dan operasi masing-masing adalah 138 N/m dan 1058 N/m. Besar gaya tahanan tanah pada kondisi instalasi dan operasi masing-masing adalah 111 N/m dan 121 N/m. Berdasarkan kriteria absolute lateral static, pipa bawah laut tidak stabil secara lateral pada kondisi instalasi dan operasi karena berat terendam aktual lebih kecil dari berat terendam minimum yang harus dipenuhi agar stabil. Berdasarkan kriteria generalized parameter pipa bawah laut tidak stabil secara lateral pada kondisi operasi, namun stabil secara lateral pada kondisi instalasi. Panjang free span pipa bawah laut maksimum yang diijinkan agar tidak terjadi local buckling adalah 50 m.
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Submarine pipeline is a transportation technology that is used for transporting hydrocarbon. Oil and gas industry has proven that the use of submarine pipelines is the most economical to transport fluids in a large scale. In this study, an analysis of on-bottom stability and local buckling on a submarine pipeline from the platform to the ULA platform belonging PT.PHE UW ONWJ. On-bottom stability analysis aims to determine whether the submarine pipeline vertically and laterally stable on the seabed when exposed to hydrodynamic loads. Local buckling analysis aims to determine allowable free span length of the pipeline in order to avoid pipeline buckling. Horizontal hydrodynamic force on the condition of the installation and operation is 405 N / m and 1119 N / m respectively. Vertical hydrodynamic force on the condition of the installation and operation is 138 N / m and 1058 N / m respectively. Soil passive resistance on the conditions of installation and operation is 111 N / m and 121 N / m respectively. Based on the criteria of absolute lateral static, submarine pipelines unstable laterally on installation and operating conditions for the actual submerged weight is smaller than the minimum submerged weight that must be fulfilled in order to be stable. Based on the criteria for generalized parameter submarine pipeline unstable laterally on the operating condition, but stable laterally on the installation conditions. Allowable pipeline free span length to avoid local buckling is 50 m.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 621.867 2 Sib a 3100017068402 |
| Uncontrolled Keywords: | Pipeline, On-bottom Stability, Local Buckling |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA660.P55 Underground pipeline design, construction and management |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 21 Feb 2020 02:18 |
| Last Modified: | 21 Feb 2020 02:18 |
| URI: | http://repository.its.ac.id/id/eprint/74904 |
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