Abstract

Structured Light is not a new technology, but it is new to the pipeline industry. This paper will provide an overview of how the structured light technology works within the direct examination process regarding time, error, impact on corrosion analysis and how it is now being used as the preferred verification method for gathering pipeline corrosion and other defect measurements. Hazardous liquid and gas pipeline operators are tasked with the responsibility of complying with regulatory requirements to ensure that field data gathered of pipe and corrosion defects are assessed properly after in-line inspection, direct examination or other maintenance activities. The focus has been to hire companies that are qualified in some tasks, but not experienced in all phases of direct examination, which includes corrosion, gouges, dents, weld defects, cracks, wrinkle bends, SCC, construction defects, etc. There is a need in the pipeline industry to assess the severity of a particular anomaly (corrosion pits, dent, gouge, etc.) on a pipe as to whether or not reduction in pressure, repair (grinding/composite or steel sleeve) or replacement is required. In addition, there is also a need for prioritizing and verifying in-line-inspection (ILI) data, and determining reassessment and remaining-life assessments of these pipe sections. If these defects cannot be measured accurately, then the resulting analyses is meaningless. This paper will provide an understanding of the differences between "screening tools" and "prove up tools" as well as the benefits of the structured light technology (accuracy, repeatability, reliability and low cost) that meets industry standards and government regulations.

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