Atteris performed a corrosion assessment of the pipeline using an in-house approach that tracked the growth of every significant corrosion feature across several ILI pig runs. The future growth of each feature was then extrapolated and assessed with PDAM methods.
To perform the assessment, Atteris used a range of input data including the pipeline design, its operations history, in-line inspection results and flow assurance data. Atteris developed a probabilistic corrosion model to extrapolate each corrosion feature’s growth to determine when the pipeline would reach its serviceability limit state.
Atteris also reviewed the historical corrosion inhibitor dosing data and provided the Client with a recommendation on the effectiveness of the existing dosing regime.