DNV GL updates two subsea pipeline recommended practices
DNV GL has updated two recommended practices, one for corroded pipelines (DNV-RP F101) and one for integrity management of submarine pipeline systems (DNV-RP-F116).
The revisions aim to further support the decision-making processes related to maintaining the integrity of pipeline systems in the areas of extension of in-service operation, costly repairs and replacements, long-term planning of activities based on balanced evaluations of both technical and non-technical issues, and continuous improvement of integrity management.
The update to DNV-RP F101 includes a new assessment methods on how to estimate the pressure resistance of a pipeline containing long axial grooving (the methodology is also applicable for pipelines with other patterns of internal corrosion), and assessment of internal corrosion development with time. The revisions aim to improve corrosion defect assessments, through thorough probabilistic evaluation, corrosion development evaluations, and pressure resistance calculations accounting for system effects.
The revision of DNV-RP-F116 provides more comprehensive guidelines on carrying out risk assessments. Guidelines regardingintegrity management reviews as well as recommendations for identifying key performance indicators have also been revised and updated.