#TITLE_ALTERNATIVE#

• Main Author: SIMANJUNTAK (NIM 12103044), RICARDI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/9075
• Institution: Institut Teknologi Bandung

Onshore pipeline is buried pipeline that is used for transporting fluid from one place to others. Porong-Gresik pipeline is one example of onshore pipeline. Yet, the mud spout case of PT. Lapindo Brantas make pipe situated in 1,5-2 meter depth has soil load (included soil cover) addition until 7-12 meter to hold on the mud spout that is more increasing. Topography observation around the mud spout show the land subsidence. And it is feared that those cases will influence the pipe.<p> <br /> <br /> <br /> <br /> <br /> <br /> Therefore, it is necessary to do lesson for analyzing the pipe strength that is caused by the soil load (included soil cover) addition and land subsidence. Based on environment condition at this pipeline, writer makes model and simulation by using Finite Element Method. There are three cases that will be analyzed at this final project. Case I, soil load is supported by soil (included soil cover) with load combination and other simulation variation. Case II, pipe load is supported partially (free span) by soil (included soil cover) with load combination and other simulation variation. And the last, case III, soil load that is caused by land subsidence (uniform and linear models) with other simulation variation. By making model and simulation, we get output like pipe deflection, Von Mises stress, and pipe strain. After that, it is analyzed by safety factor to know the safety limit of the pipe. And then, we can also predict the remaining life of the pipe that is caused by the change of the pipe environment condition.<p> <br /> <br /> <br /> <br /> <br /> <br /> The result of the simulation shows that, in case I, until the height of soil (included soil cover addition) is 15 meter above the analyzed pipe, the pipe is still in safety condition. In case II, we get the relation that longer the free span and soil height, more decreasing the pipe safety factor. For case III (uniform model), at the soil height that is 2 meter above pipe, the remaining life of the pipe inside the sand is 77 days. Eventhough the pipe that is inside the loam has 31 days remaining life. Case III (linear model), at the soil height that is 2 meter above pipe, the pipe remaining life inside the sand is 120 days.