Optimasi konfigurasi sudut stinger dan kedalaman laut dengan local buckling check

Putri, Desak Made Ayu Pradnya (2014) Optimasi konfigurasi sudut stinger dan kedalaman laut dengan local buckling check. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Semakin meningkatnya eksplorasi minyak dan gas maka akan semakin dibutuhkannya mode transportasi pengangkut minyak dan gas. Sistem perpipaan merupakan salah satu mode transportasi minyak dan gas yang banyak digunakan dikarenakan lebih efisien dan lebih efektif. Pada saat proses instalasi ada 2 kategori yang harus dianalisa yaitu overbend dan sagbend. Analisa dilakukan dengan bantuan OFFPIPE untuk menghitung besarnya tegangan Von Mises yang bekerja pada saat proses laying dengan variasi kedalaman dan sudut stinger. Setelah didapatkan tegangannya, maka akan dihitung local buckling yang terjadi pada daerah sagbend dan overbend pada saat proses laying. Studi kasus yang digunakan dalam tugas akhir ini adalah proyek saluran pipa baru “EPCI for MRA-MMJ” dari PT. PHE ONWJ. Variasi sudut stinger yang digunakan adalah 6.66, 8.88, 11.1, 13.32, 15.54 derajat dan masing-masing case memiliki perbedaan pada kedalaman laut mulai case 1-9 yaitu 14.935, 15.979, 17.023, 18.067, 19.11, 20.155, 21.199, 22.243 dan 23.287 meter. Dari hasil penelitian ini didapatkan hasil bahwa sudut optimal adalah sudut 11.1 derajat. Selain itu dapat dikatakan bahwa pipeline tidak mengalami local buckling karena memenuhi premissible combination dari code DNV 1981. ============================================================================================================== With the increase in oil and gas exploration, the mode of transportation of oil and gas transporters will be needed. Piping system is one mode of transportation of oil and gas are widely used due to more efficient and more effective. At the time of the installation process, there are two categories to be analyzed are overbend and sagbend. The analyzes were performed with the help of OFFPIPE to calculate Von Mises tension that works on the laying process with the variation of the depth and angle of the stinger. When the voltage has obtained, it will calculated the local buckling that occurs in the overbend and sagbend area during the laying process. The case study used in this thesis is a new pipeline project "EPCI for MRA-MMJ" of the PT. PHE ONWJ. Variations stinger angle that used are 6.66, 8.88, 11.1, 13:32, 15:54 degrees and each case has a difference in water depths ranging case 1-9, which are 14.935, 15.979, 17.023, 18.067, 19.11, 20.155, 21.199, 22.243 and 23.287 meters. From the results of this study showed that the optimum angle is the angle of 11.1 degrees. Moreover, it can be said that the pipeline did not experience local buckling due to meet permissible combination of DNV code 1981.

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 621.867 2 Put o 3100015058721
Uncontrolled Keywords: Laying, Stress, Stinger, Overbend, Sagbend dan Local Buckling.
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA656.2 Buckling
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: Yeni Anita Gonti
Date Deposited: 23 Sep 2020 07:07
Last Modified: 23 Sep 2020 07:07
URI: http://repository.its.ac.id/id/eprint/82008

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