Tsani, Atika Sekar (2017) Analisa Lateral Buckling Akibat Pipeline Walking Pada Subsea Pipeline. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dewasa ini, industri offshore pipeline sering kali menghadapi tantangan yang kompleks seiring dengan bergeraknya industri oil and gas ke laut yang lebih dalam untuk pencarian hidrokarbon. Salah satunya adalah pipeline yang memiliki tekanan dan suhu yang tinggi. Selain itu, pipa mengalami start up dan shut down selama masa hidupnya. Kedua hal tersebut dapat menyebabkan pipeline bergerak secara aksial menuju cold end yang biasa disebut pipeline walking dan buckling secara lateral, fenomena tersebut dapat mengakibatkan kegagalan pada sambungan pipa. Pada tugas akhir ini pipa yang dianalisa memiliki panjang 27,14 km. Pada analisa ini perhitungan walking secara manual didapatkan nilai sebesar 0,160 m setiap satu siklus. Selanjutanya dilakukan pemodelan dan analisa pipa untuk mengetahui tegangan maksimum dan besar displacment yang terjadi. Setelah mengalami satu siklus, pipa akan mengalami walking sebesar 0.16 m dan memiliki tegangan maksimum sebesar 127 N/mm2. Namun setelah pipa mengalami 14 siklus, pipa akan mengalami kegagalan akibat overstress. Tegangan maksimum pipa setelah siklus 14 adalah sebesar 407 N/mm2
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Nowadays, the offshore pipeline industry often faces complex challenges as the oil and gas industry moves deeper into the ocean to search for hydrocarbons. The examples are a pipeline that has high pressure and has a high temperature. In addition, the pipe started up and shut down during its lifetime. Both of these can cause the pipeline to move axially toward the cold end called pipeline walking and buckling laterally, the phenomenon may result in failure of the pipe connection. In this final project, the pipe analyzed has a length of 27.14 km. In this analysi,s walking calculation manually obtained value of 0.160 m every single cycle. Furthermore, pipe modeling and analysis are done to find out the maximum stress and the value of the displacement. After experiencing one cycle, the pipe will experience walking of 0.16 m and has a maximum stress of 127 N / mm2. But after the pipe has 14 cycles, the pipe will fail due to overstress. The maximum stress of pipe after cycle 14 is 407 N / mm2
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Pipeline Walking, Lateral Buckling, Hobbs Method, |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Atika Sekar |
| Date Deposited: | 08 Nov 2017 06:40 |
| Last Modified: | 08 Mar 2019 03:51 |
| URI: | http://repository.its.ac.id/id/eprint/45017 |
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