Perpustakaan Digital ITB

On December 24, 2022, several piping system routes at PT Geothermal Energy Karaha Bodas experienced damage caused by an earthquake. The piping system affected by the earthquake includes the piping system located at production well 6. Due to the unsafe conditions of production well 6 caused by the subsidence of the land, PT Geothermal Karaha Bodas constructed a new production well within production well 3. Piping systems require careful design and calculations to ensure their safety and optimal performance. Stress analysis helps predict the design life of a piping system. In addition to stress analysis, this thesis also includes calculations and selection of the appropriate pipe wall thickness for the analyzed piping system, as well as seismic analysis, which involves calculations in the event of external factors such as earthquake loads. Therefore, this bachelor thesis aims to conduct piping stress analysis and seismic load analysis using Caesar II software on the newly rerouted piping system. The stress analysis was conducted following the guidelines of ASME B31.1, ASME B36.10M, ASCE 7, and SNI 1726:2019 for the Karaha Bodas piping system. This modeling is conducted on five pipe sizes with nominal diameters of 100 mm, 200 mm, 250 mm, 300 mm, and 350 mm, respectively. The piping stress analysis resulted in a highest stress reaching 221719.80 kPa under expansion load conditions, and the lowest stress of 62475.03 kPa under sustained load conditions. The seismic load analysis resulted in a highest stress of 131321.80 kPa under operating conditions in the +Z direction and a lowest stress-to-allowable stress ratio of 69511.10 kPa under occasional conditions in the -X direction.