ANALISA INTEGRITAS PIPA MILIK JOINT OPERATION BODY PERTAMINA-PETROCHINA EAST JAVA SAAT INSTALASI

YUDHANAGARA, ALFARIC SAMUDRA (2014) ANALISA INTEGRITAS PIPA MILIK JOINT OPERATION BODY PERTAMINA-PETROCHINA EAST JAVA SAAT INSTALASI. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Instalasi pipa adalah proses pemasangan pipa di laut. Joint Operation Body Pertamina-Petrochina East Java (JOB-PPEJ) ingin menambah satu pipa offshore baru dengan menggunakan pipa berukuran 10’ inchi sejajar disamping pipa existing yang berada di Palang Station ke FSO Cinta Natomas, Tuban, Jawa Timur. Hal yang harus diperhatikan dalam instalasi pipa offshore adalah besarnya tegangan (stress) yang terjadi pada pipa saat proses tersebut. Mulai dari saat pipa masih diatas laybarge, stinger dan saat pipa menyentuh seabed. Ada 2 kategori area yang harus dianalisa, yaitu overbend dan sagbend. Selain itu, stabilitas pipa bawah laut diperhitungkan dengan mempertimbangkan efek gaya-gaya hidrodinamika yang bekerja pada pipa. Pada tugas akhir ini dilakukan analisis gaya dan stabilitas yang bekerja pada pipa saat instalasi serta analisis tegangan yang terjadi saat instalasi. Pemodelan dilakukan dengan software untuk mengetahui besar tegangan yang terjadi sedangkan untuk perhitungan stabilitas menggunakan codes DNV RP F109 dan dari hasil analisa menunjukkan besar stabilitas lateral sebesar 2,826 dan stabilitas vertikal sebesar 1,926, maka dari hasil tersebut sudah memenuhi syarat pada codes DNV RP F109. Saat instalasi dengan metode S-Lay, tegangan terbesar yang terjadi pada daerah overbend sebesar 60,20 %SMYS dan pada daerah sagbend sebesar 12,39 %SMYS, maka dari hasil tersebut tegangan terbesar pada daerah overbend dan sagbend tidak melebihi allowable stress pada material. =============================================================== Installation is process of installation of plumbing pipes in the sea. Joint Operation Body Pertamina-Petrochina East Java (JOB-PPEJ) wants to add a new offshore pipeline using pipe measuring 10 'inch pipeline parallel to the existing besides residing in Palang Station to the FSO Cinta NAtomas, Tuban, East Java. It should be considered in the installation of offshore pipelines is the magnitude of stress that occurs in the process when pipe. Starting from time pipe is still above laybarge, stinger and when pipe touches seabed. There are 2 categories of areas that must be analyzed, namely overbend and sagbend. In addition, the stability of subsea pipelines is calculated by considering the effects of hydrodynamic forces acting on the pipe. In this final analysis and stability of the work force at the time of installation and pipe stress analysis that occurred during installation. Modeling is done by the software to determine the stress that occurs while large for stability calculations using DNV RP F109 codes and of the results of the analysis show great lateral stability and vertical stability at 2,826 by 1,926, then the results are already eligible to DNV RP F109 codes. During the installation of the S-Lay method, the greatest stress occurs in region amounted to 60.20% SMYS overbend and sagbend area of 12.39% SMYS, then results of greatest stress on overbend and sagbend not exceed the allowable stress in the material.

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 621.867 2 Yud a
Uncontrolled Keywords: Stress, Overbend, Sagbend, S-Lay
Subjects: T Technology > TS Manufactures > TS280 Pipe Bending, Tube Bending
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 13 Jan 2017 06:16
Last Modified: 13 Jan 2017 06:16
URI: http://repository.its.ac.id/id/eprint/1536

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