DESIGN AND TOWING ANALYSIS OF FLOATING SHORE-PULL INSTALLATION PROCESS OF SUBSEA PIPELINE IN MADURA STRAIT

• Main Author: Raynaldi, Akhmad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/66390
• Institution: Institut Teknologi Bandung

This study aims to discuss the analysis of subsea pipeline design planning and towing analysis of 2000meters long pipe deployment which will be used for the operation of natural gas distribution. The design planning process carried out includes planning the pipe wall thickness, concrete coating thickness, and the maximum span length that the pipe can bear. Towing analysis during pipe laying aims to maintain the condition of the pipe so that there is no deformation by counting the deflections and stresses that occure along the laying of the pipelne.The design of pipe wall thickness considers various possibility of buckling failures that occure to the pipeline system based on DNV OS-F101 and ASME B31.8 . The design of concrete coating thickness considers the lateral stability and vertical stability of pipeline system based on DNV-RP-E305 and DNV-RP-F109. Maximum length of free span pipeline considers the static and dynamic conditions of pipeline based on DNV-RP-F105 and DNV 1981. Towing analysis while pipe laying process considers the angle of towing to avoid value of stress that exceeds the allowable stress limit.The result showed that pipe wall thickness is 0,5inches and concrete coating thickness is 1,84inches and the maximum free span length is 33,15meters. Maximum deflection that occurs while pipe laying process can reach up to 8,13meters with maximum pipe deployment length is 348meters. Maximum stress value that occurs along the 348 metes long pipe deployment is 358,4MPa