The study focused on whether existing pipeline infrastructure could be repurposed for CO₂ service without compromising safety or structural integrity. With dense-phase CO₂ introducing different corrosion and fracture risks than conventional service, the work was designed to identify the engineering controls, standards compliance and material performance requirements needed to support safe future operation.
Corrosion control
Assessed to NACE standards for safe CO₂ transport
AS 2885 assessment
Safety and structural integrity confirmed
Fracture toughness
EPDECOM modelling confirmed ductile integrity
The review adhered to NACE guidelines and included a detailed assessment of corrosion risks specific to dense-phase CO₂. It also examined relevant industry publications on CO₂ pipeline repurposing and completed a compliance review against Australian Standard AS 2885 Parts 1 and 3. Together, this work established a strong technical basis for determining whether repurposed infrastructure could safely operate under the proposed service conditions.
Verbrec used advanced EPDECOM modelling to evaluate fracture toughness and determine the level of ductile performance required for safe operation. The study also included a gap assessment to identify any additional safety measures needed for retrospective application, guided by the ALARP principle. Where risks were identified, alternative fracture control strategies were explored to help manage potential failure scenarios and support safe long-term operation.
The feasibility study identified the technical and safety considerations required to convert existing pipelines for high-concentration CO₂ service effectively. It provided practical guidance on maintaining pipeline integrity, managing corrosion and fracture risks, and supporting safe operational practices under new service conditions. In doing so, the study helped translate complex integrity analysis into a clearer decision-making framework for future carbon transport projects.
The feasibility study clearly identified the technical and safety considerations required for converting existing pipelines to manage high concentrations of CO₂ effectively. It provided detailed insights into maintaining pipeline integrity and ensuring safe operational practices.