Session: Corrosion in Carbon Capture, Transportation, and Utilization and Storage (CCTUS) (Part I of III)
Integrity Implications of Pipelines Converted to Dense CO2 Service (C2026-00441)
Wednesday, March 18, 2026
8:00 AM - 8:30 AM Central
Location: 342 DE
Earn .5 PDH
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As carbon capture and storage (CCS) initiatives expand globally, deployment of CO₂ pipelines has become a crucial component of decarbonization and sequestration infrastructure. Dense CO2 in either a supercritical phase or liquid-like phase has been worldwide selected for long-distance transportation. Unlike conventional hydrocarbon pipelines, dense CO₂ pipelines present unique integrity challenges such as internal corrosion and fracture propagation. This paper first overviews the key changes including spike hydrostatic pressure for design and construction requirements, in-line inspections for identifying existing defects, and material toughness for fracture control. This paper then investigates the major integrity threats, i.e., internal corrosion and the presence of impurities (e.g., SO2, H2S). The paper also explores the role of predictive modeling and risk-based inspection planning in addressing data gaps. Based on the findings, a proactive integrity management approach grounded in preventive and mitigative strategies was developed. Key measures include impurity control through upstream gas processing, material selection, pipeline repurposing based on compatibility with CO₂ service, and the implementation of robust monitoring and inspection plans for early detection. Through leveraging current pipeline practices and historical failure data, this paper creates a comprehensive framework including phase control method, internal corrosion mitigation, and crack arrest recommendation for ensuring reliable transportation.
