Changes to In-Line Inspection Approaches to Consider with Changing Regulations

23/10/2020

    Originally published for the Pipeline Pigging and Integrity Management Conference February 19, 2020.

    The expected changes to pipeline regulations include provision for applying engineering critical assessment (ECA) of anomalies that would normally need investigation within a short period of time to potentially extend the response time to a monitored condition.

    The caveat for the ECA analysis is that the analysis must be completed and documented within a period allowed for by the regulation, for example, 10 days for immediate anomalies. Having data and analyses on hand for an ECA is key to meeting the deadlines as required by regulation. This paper will provide some examples and scenarios where changes to the traditional approach to in-line inspection (ILI) can maintain the same level of integrity while using ECA to place anomalies on a more reasonable schedule. Examples of approaches for addressing dents with metal loss, corrosion of or along a longitudinal seam, and stress-corrosion cracking are presented. Steps that can be taken in advance to prepare for rapid assessment within certain specified timeframes are discussed as well as steps that can be taken that would improve the chances of achieving an extended response time.

    See the full paper.

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