Parametric Studies of Buckling Mitigation for Underwater Gas Transmission Pipeline by Using Buckle Arrestor

• Main Author: Ghiffari Alfarisy, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/35689
• Institution: Institut Teknologi Bandung

Failure mode that the most often appears in the deepwater pipeline system is collapse or local buckling. This failure mode is caused by hydrostatic pressure from underwater which affects the pipe. The magnitude of the possibility of this failure makes it necessary to have mitigation measures so that the pipeline integrity can run continuously. Based on technical and economic consideration, the step that can be done is to use buckle arrestor. The aim of this final assignment is to determine the effect of geometry and materials towards the local buckling resistance. The parameter varied include pipe diameter, pipe thickness, buckle arrestor length, the thickness ratio of buckle arrestor to pipe thickness, and type of material. This parametric study is carried out according to the standards of the DNVGL-ST-F101 Submarine Pipeline System. Pipe resistance to local buckling can be known by simulating the pipe at the loading condition using ANSYS software. The loading case study used is the underwater gas installation pipeline for the Masela Block Abadi Gas Field. The result of this study indicates that pipe thickness can increase pipe resistance by more than 20% and thickness ratio of buckle arrestor to pipe thickness parameter may increase in the range of 5-20% the resistance to local and propagation buckling. Meanwhile, buckle arrestor length and type of material parameter only affect buckling resistance below 5%. Eventually, the pipe diameter is inversely proportional to the resistance of pipe buckling. This study also understands that the most sensitive parameter for increasing buckling resistance is pipe thickness.