Perpustakaan Digital ITB

Natural gas remains a pivotal energy source globally due to its low carbon intensity and versatility across industrial, power generation, commercial, and residential sectors. With abundant reserves and relatively low production costs, natural gas acts as a pivotal role in future energy landscapes. To meet rising domestic demand, expanding natural gas infrastructure, including pipelines, is essential. However, prolonged operation of pipelines can lead to various forms of damage such as corrosion, which compromises structural integrity and operational safety. This undergraduate project focuses on assessing a natural gas pipeline, located at certain region in Sumatera Island from the well production facility to a processing facility over a distance of about 4.7 km. The pipeline segment, particularly between KP 2785 and KP 2803, has experienced corrosion anomalies that affect its integrity. A total of 14 corrosion anomalies with varying sizes have been identified in the determined region, necessitating a thorough Fitness-For-Service (FFS) evaluation according to API 579-1/ASME FFS-1 (2021). Using API 579-1/ASME FFS-1 (2021) guideline, a comprehensive FFS Level 3 assessment for metal loss damage type was conducted. The assessment result revealed that the pipeline can still operate with derated conditions at temperature of 199.4°F (93?) and pressure of 500 psig for approximately seven months. Beyond this period, further operational derating or remedial actions are required to ensure the safety of continued operation. This study highlights the critical role of FFS assessments in maintaining the pipeline integrity and safety against the corrosion damage.