Laminations have been a persistent concern for pipeline operators, affecting both vintage and modern offshore and onshore pipelines. Leveraging over a decade of in-line inspection (ILI) data and a comprehensive dataset of more than 2 million mid-wall anomalies, this study approaches the issue of laminations from a fresh perspective.

Laminations in pipelines can be either non-injurious or potentially injurious, making it critical to study and evaluate them to mitigate operational risks. While standards like API 579 offer methods for assessing laminations, they do not fully address the application of ILI data, which may lead to overly conservative assessments or the neglect of injurious laminations.

This paper presents a novel methodology for evaluating lamination severity using UT ILI data. The proposed framework incorporates a prioritization strategy based on API 579 assessment guidelines, with additional considerations for laminations located near welds, offering a more precise and actionable approach to managing pipeline integrity.