SOfPD Subsea Pipelines Technical Assessment

The assessment approach for the study utilized a semi-quantitative risk-based methodology designed to identify, analyze and evaluate risk associated with each subsea pipeline. The risk calculation combines the Probability of Failure (PoF) and the Consequence of Failure (CoF). The PoF calculations considered different factors, which believed to have direct impact on the likelihood of pipelines failure including: internal corrosion, hydrogen induced cracking (HIC) susceptibility and mechanical integrity. In general, the risks levels are High, Medium-High, Medium and Low. The High and Medium-High risks level is mainly driven by the high CoF due to significant economic and environment impacts and high PoF due to internal corrosion, HIC cracking susceptibility and mechanical integrity. In order to lower the risks both PoF and CoF should be reduced.