Risk Assessment Dan Strategi Inspeksi Pipeline Kilometer Point 11 Hingga 22,9 Berdasarkan Metode Risk Based Inspection API 581

Abstract

The 30-inch sales gas pipeline spanning 22.9 km in Central Sulawesi plays a vital role in transporting natural gas from upstream facilities to midstream facilities for liquefaction into LNG. This pipeline is part of a national vital object and contributes significantly to state revenue. Data from Ultrasonic Testing (UT), In-Line Inspection (ILI), and Corrosion Coupons (CP) were used in the Risk-Based Inspection (RBI) assessment using a quantitative approach based on API 581. Segmentation was carried out based on environmental conditions from the alignment sheet document. The values of Probability of Failure (PoF) and Consequence of Failure (CoF) were calculated to determine the risk ranking. Inspection planning was based on a medium-high risk target category. This final project focuses on the analysis of inspection data for Risk-Based Inspection (RBI). The analysis results show that the highest risk occurs in segments 29 and 30, which fall within matrix 1D, categorized as medium. Simulations conducted for all segments indicate that the risk values for segments 1 to 30 remain below the target risk threshold over the next 6.5 years. However, inspection is still scheduled in the 10th year in accordance with API 570, using the ILI-MFL method to maintain inspection effectiveness.