Naditya, Wiraksini (2014) Analisa On-Bottom Stability Offshore Pipeline : Studi Kasus Kb-Kcom Platform PT. Pertamina Hulu Energi Offshore North West Java. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tugas akhir ini bertujuan untuk mengetahui bagaimana tahap awal perencanaan offshore
pipeline yang meliputi Wall thickness nominal yang dibutuhkan, ketebalan Concreate Coating
yang dibutuhkan agar dapat melawan lifting force. Studi kasus yang dipakai dalam tugas
akhir ini adalah proyek saluran offshore pipeline dari platform Kb menuju platform Kcom
sepanjang 1.064 m di laut Jawa dengan masa layan 25 tahun. Pada analisis Wall thickness
didapat ketebalan 9,5 mm, analisa stabilitas pipa baik lateral maupun vertikal memenuhi
kriteria yang ditentukan oleh code yaitu angka stabilitas vertikal dan lateral tidak melebihi
1,1. Hasil perhitungan dan pemodelan pipa menunjukkan saat ketebalan concrete coating
sebesar 30 mm dengan nilai stabilitas vertikal 1,697 dan stabilitas lateral 4,18 . Pemodelan
pipa dilakukan dengan menggunakan software dengan mengatur besar kecepatan arus sebesar
0,287 m/s dan besar diameter total sebesar 0,287m,sehingga tekanan paling besar mengenai
pipa yaitu sebesar 144.7 Pa.
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This final project aims to determine how the initial planning phase offshore pipeline that
includes Wall nominal thickness required, concreate Coating thickness is needed in order to
resist the lifting force. The case study used in this thesis is the channel project offshore
pipeline from the platform to the platform Kb-Kcom along the 1,064 m in the Java Sea with
25-year service life. Wall thickness analysis obtained at a thickness of 9.5 mm, the analysis of
the stability of both lateral and vertical pipe meets the criteria specified by the code that is a
vertical and lateral stability does not exceed 1.1. Calculations and modeling results indicate
pipe when concrete coating thickness of 30 mm with a value of 1,697 vertical stability and
lateral stability 4.18. Pipe modeling is done by using software to adjust the flow rate of 0.287
m / s and a total of 0,287m large diameter, so the greatest pressure on the pipe is equal to
144.7 Pa.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 665.544 Nad a |
| Uncontrolled Keywords: | offshore pipeline, wall thickness, on-bottom stability, concrete coating |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 14 Feb 2018 02:57 |
| Last Modified: | 08 Apr 2020 06:30 |
| URI: | http://repository.its.ac.id/id/eprint/51256 |
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