Kiefner & Associates Inc.

ILI Unique Anomaly Interpretation

Understanding the results of an ILI is key to a proper Response.

Review of direct ILI signal and report data from an ILI run assists in mitigation plans to optimize time and resources when selecting digs. Sometimes an anomaly appears to be unique or is located in a difficult to repair location. Such anomalies require added scrutiny and careful evaluation before a decision to investigate it in the field can be made.

The Kiefner Solution

Kiefner addresses many unique anomaly scenarios, including the following:

  • Denting and metal loss

Corrosion metal loss in a dent is usually not more damaging than similar corrosion in plain pipe, whereas metal loss caused by gouging is usually considered to be serious damage.

  • Corrosion on the seam

ILI tools need to differentiate between crack‐like selective seam weld corrosion (SSWC) from conventional corrosion that just happens to encounter a low frequency ERW seam.

  • Wide area corrosion

Some of the pits within a large corrosion area may not be detected or accurately sized, and failing to include these defects may underestimate the amount of missing metal when attempting to calculate a failure pressure using standard methods for evaluating the remaining strength of corroded pipe.

At Kiefner, we are developing methods to better interpret the ILI signals by incorporating past experience and historical information on the line itself. The goal is to improve pipeline safety by identifying anomalies that could impact the integrity of the pipeline while more reliably dismissing non-critical anomalies.

For more information on how our anomaly interpretation analysis may support your next project, reach out to us [email protected].

Understanding the Results

Matched data pairs are evaluated, comparing metal loss depths of two successive inspections. A unity graph quickly shows corrosion growth in a meaningful, yet familiar way. Negative bias could be due to corrosion growth and is analyzed further to provide a calculated GCR specific to the pipeline. Any metal gain could indicate ILI measurement error or mill features which should not be subject to time-dependent growth (corrosion). Areas where recoats or other repairs have occurred should be considered separately from the overall CGR. Kiefner provides the experience and insight to help you understand your data.

Benefits of CorroSure

  • Align and match ILI reported indications
    • CorroSure aligns and matches In-line Inspection (ILI) reported indications with visual, pattern-matching detail. A thorough review of the data by both advanced algorithms and highly experienced data analysis ensures comprehensive data accuracy.
  • Full pipeline system correlated
    • CorroSure correlates the entire pipeline system, providing a holistic view of your infrastructure. No segment is left unexamined, ensuring a comprehensive understanding of your pipeline’s health.
  • Indicate areas of corrosion growth
    • CorroSure pinpoints areas of corrosion growth with exceptional accuracy. Identifying these vulnerable spots empowers proactive maintenance and timely interventions, minimizing risks.
  • Correlate differing technologies or vendors
    • CorroSure allows you to compare data from different technologies such as MFL and UT. Additionally, it enables the comparison of ILI data from various vendors. This comparative analysis aids in selecting the most effective solutions for your specific needs.

Kiefner’s Customized Approach

Kiefner analyzes diverse ILI datasets to prioritize anomaly responses. We craft tailored mitigation strategies, ensuring pipeline safety against unforeseen anomalies. With tools like LaserSure™, Kiefner ensures optimal pipeline function and heightened safety standards.

For more information on using LaserSure™ for your next project, contact us at [email protected].

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