Analisis Pengaruh Sudut Stinger pada Instalasi S-Lay Pipa 52 Inci dengan Penambahan Beban Piggyback

Nusaly, Abiyya Fairuz (2025) Analisis Pengaruh Sudut Stinger pada Instalasi S-Lay Pipa 52 Inci dengan Penambahan Beban Piggyback. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pipa adalah salah satu dari beberapa cara untuk mengangkut minyak dan gas dari lepas pantai ke darat. Pemasangan pipa diperlukan sebelum pengangkutan dapat dilakukan. Metode yang umum digunakan dalam pemasangan pipa adalah metode s-lay dimana pipa diturunkan ke dasar laut dengan bentuk huruf “S” menggunakan stinger yang dipasang pada barge. Tugas akhir ini mengkaji support reaction dari roller dan local buckling pipa untuk memastikan bahwa pipa aman selama instalasi. Selain itu, dilakukan analisa konfigurasi stinger yang optimal. Penelitian dilakukan dengan variasi kedalaman air 12 m dan 35 m. Sebuah pipa 52 inchi API 5L Grade X65 PSL2 dengan piggyback 6 inchi API 5L Grade X42 PSL2 dianalisa dengan menggunakan perangkat lunak elemen hingga. Hasilnya menunjukkan bahwa support reaction maksimum terjadi pada barge roller #9 pada kasus 14. Local buckling terjadi pada saat instalasi kedalaman 35 m, yaitu pada saat sudut stinger 4 derajat, 6 derajat, dan 10 derajat. Direkomendasikan untuk menggunakan sudut stinger 4 derajat, 6 derajat, dan 8 derajat untuk instalasi kedalaman 12 m dan sudut stinger 8 derajat untuk instalasi kedalaman 35 m.
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Pipeline is one of several ways of transporting oil and gas from offshore to onshore. Installation of the pipeline is required before the transporting could be done. The commonly
used method in pipeline installation is called the s-lay method where the pipe is lowered to the seadbed in a letter “S’ shape using a stinger that is attached to a barge. This research examines the roller support reaction and the pipeline buckling to ensure that the pipeline is safe during installation. In addition, the optimum stinger configuration is analyze. The study is conducted with 12 m and 35 m water depth variation. A 52 inch pipe of API 5L Grade X65 PSL2 with a 6 inch piggyback of API 5L Grade X42 PSL2 is analyze using a finite element software. The results shows that the maximum support reaction happened in barge roller 9 on
case 14. Local buckling occurred during 35 m depth installation, namely when the stinger angle was 4 deg, 6 deg, and 10 deg. It is recommended to use 4 deg, 6 deg, and 8 deg stinger angle for 12 m depth installation and 8 deg stinger angle for 35 m depth installation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	s-lay, piggyback, stinger angle
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA656.2 Buckling T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Abiyya Fairuz Nusaly
Date Deposited:	21 Jul 2025 03:02
Last Modified:	21 Jul 2025 03:02
URI:	http://repository.its.ac.id/id/eprint/120203

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