Pereira, Adriano Ximenes (2022) Analisis on-bottom stability pipa gas bawah laut (Studi Kasus : Bromo Project Di Kabupaten Sidoarjo). Other thesis, Institut teknologi sepuluh nopember.
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Abstract
Pipa bawah laut merupakan sarana transportasi yang sangat penting terutama untuk
menyalurkan minyak dan gas bumi dari sumbernya ke tempat pengolahan. Jaringan pipeline
harus didesain kuat dan stabil, jika pipeline mengalami kegagalan akan menimbulkan kerugian
ekonomi dan lingkungan yang sangat besar Oleh karena itu diperlukan beberapa analisis utama,
salah satunya adalah analisis On-Bottom Stability dan analisis panjang maksimum free span
yang diijingkan. Analisis stabilitas pada pipa bawah laut perlu dilakukan untuk mengetahui
stabilitas pipa bawah laut terutama saat kondisi operasi dimana pipa bawah laut terkena gaya
yang diakibatkan oleh beban gelombang dan arus dan memastikan bahwa pipa bawah laut
mampu melawan gaya apungnya agar meletak di dasar laut Berdasarkan analisis stabilitas, pipa
bawah laut dapat dikatakan stabil apabila memiliki nilai factor keamanan kurang dari atau sama
dengan 1, baik nilai stabilitas vertikal maupun lateral. dari hasil perhitungan On-Bottom
Stability DNV RP F109 Besar gaya hidrodinamika puncak horizontal dan vertikal masing�masing dengan kedalaman 19 meter dengan nilai 2093.59 N/m dan 1666.70 N/m, Stabilitas
Vertikal 0.83 dan nilai dari Stabilitas Lateral sebesar 1 Sesuai DNV RP F109 konfigurasi ini
memenuhi kriteria stabilitas dan pipa dapat dikatakan stabil.
free span dinamik pada pipa bawah laut yang dilakukan dengan menggunakan perhitungan
berdasarkan Boyun Guo dan panjang free span statik berdasarkan ASME B31.8. Berdasarkan
Guo Panjang maksimum free span yang diijinkan adalah minimum dari panjang span kritis
Dinamis ( in-line dan cross-flow ) dan statik maka 43 meter adalah Panjang maksimum free
span yang diijinkan.
Kata kunci : Pipa bawah laut, On-Bottom Stability, DNV ,Panjang maksimum free span.
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Subsea pipelines are a very important means of transportation, especially for distributing oil
and natural gas from the source to the processing site. The pipeline network must be designed
to be strong and stable, if the pipeline fails it will cause enormous economic and environmental
losses. Therefore, several main analyzes are needed, one of which is the On-Bottom Stability
analysis and the analysis of the maximum allowable free span length. Stability analysis on the
submarine pipeline needs to be carried out to determine the stability of the underwater pipeline,
especially during operating conditions where the underwater pipeline is exposed to the forces
caused by wave and current loads and to ensure that the underwater pipeline is able to resist the
buoyancy force so that it lies on the seabed. Based on the stability analysis, Subsea pipelines
can be said to be stable if they have a safety factor value of less than or equal to 1, both vertical
and lateral stability values. from the calculation of On-Bottom Stability DNV RP F109 The
magnitude of the hydrodynamic force of the horizontal and vertical peaks is 19 meters deep,
respectively, with a value of 2093.59 N/m and 1666.70 N/m, 0.83 Vertical Stability and a value
of 1 Lateral Stability According to DNV RP F109 this configuration meets the stability criteria
and the pipe can be said to be stable.
the dynamic free span on the subsea pipeline is carried out using calculations based on Boyun
Guo and the length of the static free span based on ASME B31.8. According to Guo, the
maximum allowable free span length is the minimum of the dynamic (in-line and cross-flow)
and static critical span length, so 43 meters is the maximum allowable free span length.
Key words : Subsea pipe, On-Bottom Stability, DNV , Maximum length of free span.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pipa bawah laut, On-Bottom Stability, DNV ,Panjang maksimum free span, Subsea pipe, Maximum length of free span. |
| 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: | Adriano Ximenes Pereira |
| Date Deposited: | 04 Feb 2022 01:54 |
| Last Modified: | 01 Nov 2022 04:03 |
| URI: | http://repository.its.ac.id/id/eprint/92730 |
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