In recent years, inline inspection (ILI) technology has become increasingly popular for assessing cracks because of its ability to identify features and its minimal impact on pipeline operations. The prevalence of ILI tools for pipeline inspections has increased the available information regarding the detection and identification of crack features. The availability of the crack sizing with ILI tools has also increased the requirement for proper assessment of measurement errors associated with the sizing. Despite the presence of sizing errors, overly conservative assumptions regarding crack shape and sizing may lead to ineffective use of resources. The importance of crack profile shape for integrity management and the geometry measures for assessing sizing errors in crack profiles will be discussed through illustrative examples in this article.
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