Browse by threat category, topic, or keyword
A structured reference for evaluating pipeline defects and integrity conditions.
This tool provides structured guidance for evaluating pipeline defects and integrity conditions. It is designed to support engineering thinking, data collection, and early-stage assessment.
It does not replace professional engineering judgment, operator procedures, or regulatory requirements.
Beta notice: This tool is an active development (beta) version. Content, structure, and guidance may change over time and may contain errors or incomplete information. Users should not rely on this tool as a final or authoritative source and should apply professional engineering judgment and applicable procedures.
Common starting points during integrity review
14 topics filtered by tag "interaction"
Interaction Issues
Corrosion colony or cluster guidance is for areas where many nearby corrosion indications form a broader damaged zone and the engineering question is no longer about one box but about the local corrosion system.
Dents
Dent guidance starts with geometric deformation but quickly moves into context: where the dent sits, whether it interacts with other threats, and whether shape alone understates the concern.
Dents
Dent at weld review focuses on dents located on or near girth or seam welds, where local stiffness changes and weld-related stress effects can drive a different response than a plain dent.
Interaction Issues
Dent with crack-like indicators is the review path for deformations that also show crack-like behavior, crack suspicion, or a local context where cracking cannot be comfortably excluded.
Interaction Issues
Dent with gouge or mechanical damage is the workflow for deformed pipe where the concern includes wall disruption, coating damage, or surface tearing from impact rather than plain geometry alone.
Interaction Issues
Dent with metal loss is an interacting condition where a geometric deformation and a wall-loss feature are located in the same local area or close enough that they may influence each other. It is more complex than either condition alone because the dent changes the local stress state while the metal loss reduces wall section and can distort how the defect is classified, sized, and prioritized. Typical sources include outside-force damage with coating disruption, corrosion that develops within or near a dented area, corrosion under an older deformation, and cases where a dent may also include gouging or other mechanical damage.
Interaction Issues
External mechanical damage from bullet strikes, equipment impacts, dropped objects, vehicle strikes, or other third-party contact can introduce dents, gouges, coating damage, localized wall loss, and stress concentration in the same local area. These conditions are not always obvious from ILI alone, so field confirmation often becomes important when the mechanism, severity, or interaction is uncertain.
Metal Loss
General metal loss is the starting point for corrosion review when wall loss is reported but the practical question is still whether the feature is isolated, interacting, growing, or part of a broader integrity mechanism.
Girth Weld / Fabrication Issues
Girth weld concern helps organize review when an anomaly is on or near a girth weld and the engineer needs to understand whether weld interaction changes significance, data confidence, or next actions.
Girth Weld / Fabrication Issues
Girth weld corrosion, or weld-associated metal loss, is the workflow for corrosion that sits at or very near a girth weld, field-joint coating area, heat-affected zone, weld shoulder, or wall-thickness transition where the weld context may change the meaning of the metal loss.
Interaction Issues
A gouge is localized mechanical damage where metal has been displaced, torn, or removed from the pipe surface. It may occur with a dent, but it can also exist without obvious gross deformation and still be important because the local notch effect, wall disturbance, and potential crack initiation can govern the integrity concern.
Interaction Issues
Interacting metal loss is the review path used when multiple nearby corrosion features could combine into a more severe effective condition than any single listed anomaly suggests.
Metal Loss
Pitting is localized metal loss with concentrated depth over a relatively small footprint. In practice, engineers often need to determine whether the call is a single pit, a colony, or part of a more irregular corrosion area.
Geotechnical / Strain
Strain concern is used when IMU, deformation, construction history, or related evidence suggests the pipe may be experiencing notable bending or strain that changes the meaning of nearby defects.