Analisis On Bottom Stability Trunk Line: Studi Kasus dari Condensate Tank Di Kilang Minyak Menuju SPM di Area Pagerungan Besar

Amalia, Intan Dwi (2019) Analisis On Bottom Stability Trunk Line: Studi Kasus dari Condensate Tank Di Kilang Minyak Menuju SPM di Area Pagerungan Besar. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam dunia industri migas penggunaan pipa bawah laut terbukti lebih ekonomis sebagai moda transportasi minyak dan gas. Selain itu pipa, bawah laut juga tahan terhadap kondisi lingkungan yang buruk. Namun apabila pipa bawah laut mengalami kegagalan akan sangat merugikan dari aspek ekonomi dan lingkungan sehingga perlu dilakukan analisis pipa bawah laut. Tugas Akhir ini membahas tentang perencanaan export pipeline milik PT. X. Adapun pipeline ini digunakan untuk menyalurkan condensate dari tangki condensate di kilang minyak menuju SPM. Analisis on bottom stabilty yang dilakukan berdasarkan code DNV RP F-109 mengenai “On-Bottom Stability Design of Submarine Pipelines”. Dikarenakan profil seabed yang tidak rata maka perlu dilakukan analisis stabilitas pada beberapa KP sepanjang pipeline tersebut, yaitu; KP 900, 1000, 1100, 1200, 1300, dan 2600. Dari analisis pada kondisi operasi yang telah dilakukan didapatkan besar gaya hidrodinamis arah horizontal paling besar adalah pada KP 1200 sebesar 88,8 N/m dan 235,3 N/m untuk arah vertical di KP 2600. Berdasarkan analisis kriteria desain stabilitas vertikal adalah 0.492 dan kriteria desain stabilitas lateral 0,2158 dan 0,1647. Hasil analisis stabilitas menunjukkan berat terendam minimum pipa yang dibutuhkan sebesar 229,3 N/m untuk melawan gaya-gaya yang bekerja disepanjang pipa. Dari hasil analisis yang dilakukan dapat disimpulkan struktur tersebut stabil dan memenuhi kriteria DNV RP F109. Kemudian dilakukan simulasi permodelan menggunakan ANSYS CFX untuk memvalidasi hasil perhitungan sesuai DNV RP F109. =============================================================================================== In the world of oil and gas industry the use of subsea pipelines has proven to be more economical as a mode of transportation of oil and gas. In addition, pipelines under the sea are also resistant due to extreme environments. However, it is necessary to analyze subsea pipelines. This Final Project discusses the planning of the export pipelines owned by PT. X. While this pipe is used to export condensate from condensate tank on onshore production facilities to the SPM. This on bottom stability analysis was carried out through DNV RP F-109 code regarding "On-Bottom Stability Design of Submarine Pipelines". Due to the uneven seabed profile it is necessary to analyze several KPs along the pipeline, namely; KP 900, 1000, 1100, 1200, 1300, and 2600. From the analysis of the operating conditions that have been carried out obtained the largest hydrodynamic force horizontal direction at KP 1200 is 88.8 N m and 235.3 N / m for vertical direction in KP 2600. Based on the criteria design for vertical stability analysis is 0.492 and for lateral criteria design are 0.2158 and 0.1647. The results of the analysis show that the minimum submerged weight requirement is 229.3 N/m to counteract the hydrodynamic forces acting along the pipe. From the results of the analysis conducted, it can be concluded that the structure is stable and fulfill the criteria of DNV RP F109. Then a simulation is performed using ANSYS CFX to validate the calculation results according to DNV RP F109.

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 665.544 Ama a-1 2019
Uncontrolled Keywords: On-Bottom Stability, DNV RP F109, Export Pipeline, Condensate, Hydrodinamic Forces, ANSYS CFX
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials.
T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
T Technology > TJ Mechanical engineering and machinery > TJ930 Pipelines (General). Underwater pipelines.
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Intan Dwi Amalia
Date Deposited: 04 Jun 2021 03:18
Last Modified: 12 Jun 2021 04:34
URI: https://repository.its.ac.id/id/eprint/60327

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