A considerable volume of data is returned from the internal inspection of a pipeline with an internal "intelligent" tool. Various inspection tools are available at a range of prices, and precision. The relative value of each tool will depend upon the specific circumstances. For example, is it a fairly new line with no expected degradation or is it an older line with known defects requiring close and accurate monitoring? The most cost effective inspection tool, may vary between these two cases.
Factors which need to be considered in selecting a specific tool are" required precision; required future operating pressure; pipeline revenue; impact of a release; and the history of the line. This paper discusses some of the issues related to the selection of the optimum internal inspection tool.
Keywords" pipelines, inspection, assessment criteria, cost effectiveness.