In order to mitigate the threat of failure due to external or internal corrosion, pipeline operators routinely inspect their pipelines using in-line inspection (ILI) tools. These tools provide the pipeline operator with indications of the size and location of metal loss in the pipeline wall.
However all ILI techniques are subject to uncertainty, which means that some defects may be missed, and the actual size of the defects will be different than those indicated. AFAA can use either deterministic or probabilistic methodologies to account for the uncertainties in ILI techniques.
AFAA have extensive experience of both development and application of such techniques. Extending the time interval between ILIs by just a few years can result in considerable savings to operators.
AFAA use validated and verified in-house software to undertake the assessments, thereby keeping assessment costs to a minimum.
At AFAA we have developed fitness-for-service assessment (FFS) software that can read ILI data, assess the severity of the various types of defects to various FFS standards, and provide the operator with a repair plan. The advantages of the software are that a significant number of defects can be assessed quickly, in order to determine which defects/pipe spools the operator should give immediate attention to.