Rahmi, Febi Aulia (2019) Analisis Kerentanan Lateral Buckling Dan Pipeline Walking Pada Production Gas Pipeline Di South Mahakam Field. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Ketika minyak bumi dan gas alam ditransfer menggunakan pipa bawah laut, biasanya pipa berada dalam kondisi bertekanan dan bertemperatur tinggi. Keadaan ini akan membuat pipa mengalami ekspansi pada ujung-ujungnya. Ekspansi pada pipa akan dilawan oleh gaya gesekan tanah dibawah pipa. Interaksi antara tanah dengan pipa akan menimbulkan gaya aksial efektif yang dapat menimbulkan tekuk ke arah lateral jika pipa berada pada seabead tanpa di pendam. Ketika gaya tahanan tanah lebih kecil maka pipa akan rentan terhadap pipeline walking. Semasa hidupnya pipa juga mengalami kondisi start up dan shut dow yang dapat mempengaruhi laju walking pada pipa setiap siklusnya, baik akibat thermal transient ataupun akibat kemiringan seabed. Pada tugas akhir ini, dilakukan analisis pada pipa sepanjang 7.5 km dengan diameter 12” yang digelar pada kedalaman maksimum 51.8 m dan dalam kedaan beroperasi. Hasil dari analisis yang dilakukan pipa mengalami ekspansi sebesar 640 mm pada ujung hot end dan 20 mm pada ujung cold end. Pipa juga rentan terhadap lateral buckling pada KP 1-2 dengan gaya aksial efektif maximum sebesar -1.28 kN. Menurut hasil analisis visual menggunakan software AUTOPIPE pipa mengalami axial displacement yang menimbulkan pipeline walking pada pipa. ==============================================================================When oil and natural gas are transferred using submarine pipes, usually the pipes are in a high pressure and temperature condition. This situation will cause expansion in pipeline-end. The expansion of the pipe will be resisted by the frictional forces under the pipe. The interaction between the soil and the pipe will cause an effective axial force which can cause lateral bending if the pipe is at the seabead without being buried. When the soil resistance force is smaller, the pipe will be vulnerable to the pipeline walking. During the life of the pipeline also experienced the conditions of start up and shut down which can affect the speed of pipeline walking in every cycle, either due to thermal transient or due to slope as well. In this final project, an analysis of 7.5 km of diameter 12 "pipe is carried out at a maximum depth of 51.8 m and in operation. The results of the analysis carried out by the pipe experienced an expansion of 640 mm at the end of the hot end and 20 mm at the end of the cold end. Pipes are also vulnerable to lateral buckling in KP 1-2 with a maximum effective axial force of -1.28 kN. According to the results of visual analysis using AutoPipe software, pipeline has axial displacement that causes pipelines walking on the pipe.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Lateral Buckling, Pipeline Walking, End Expansion |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TS Manufactures > TS280 Pipe Bending, Tube Bending |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Rahmi Febi Aulia |
| Date Deposited: | 24 Jun 2024 06:44 |
| Last Modified: | 24 Jun 2024 06:44 |
| URI: | http://repository.its.ac.id/id/eprint/69254 |
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