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Dent Assessment Based on In-Line Inspection Measurements

Lookup NU author(s): Dr Julia Race


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Mechanical damage caused by external interference is one of the main causes of pipeline failures worldwide. If failure as a result of mechanical damage is not immediate, it is possible that the induced defects can grow in service and cause failure at some time after the initial impact. often incidents of mechanical damage are unreported and the challenge to the operatir is the detection and assessment of damage before it leads to catastrophic failure. Many of the defect assessment methods for mechanical damage (or denting) rely on a measurement of the dent depth. Empirically derived equations are then utilised to determine defect acceptability in terms of dynamic or static loading. One of the main methods for detecting mechanical damage is by the use of In-Line Inspection (ILI) intelligent pigging tools. This paper reviews some of the available methods for detecting and measuring dents and discusses how ILI dent detection and measurement tools can be used in dent assessments to ensure the integrity of the pipeline.

Publication metadata

Author(s): Race JM

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 5th International Conference, Exhibition and Workshops on Pipeline Rehabilitation and Maintenance

Year of Conference: 2002