Leksington, United States of America
The article focuses on two 3D optical imaging technologies and the application of these technologies to nondestructive testing: laser line scanning and structured light. Both technologies determine depth based on triangulation between a light source, the object under inspection, and a camera sensor. Both technologies have demonstrated accuracy, precision, and probabilities of detection sufficient to meet the demands of nondestructive testing. The second part of the article focuses on the application of 3D imaging in the assessment of corrosion on pipelines. In this application, 3D imaging is used to identify areas of corrosion, determine the maximum amount of metal loss, extract the river bottom profile, and calculate the remaining strength of a pipeline.
optical testing, 3D imaging, laser scanning, structured light, pipeline, corrosion profile, metal loss, maximum allowable pressure
1. Non-Destructive Testing (NDT) Market by Component, End-User, Technique, Application & Region - Global Forecast to 2022. - Dublin, Ireland: Research and Markets, 2017.
2. An Introduction to 3D Scanning: Creaform Ebook Series Ebook #1. - Lévis (Québec), Canada: Creaform Inc., 2015, accessed on 10 October 2019 at www.creaform3d.com/sites/default/files/assets/technological-fundamentals/ebook1_an_introduction_to_3d_scanning_en_26082014.pdf.
3. ASME B31G-1991: Manual for Determining the Remaining Strength of Corroded Pipelines. - New York, NY: The American Society of Mechanical Engineers, 1991. - 55 p. Dostupno: https://law.resource.org/pub/us/cfr/ibr/002/asme.b31g.1991.pdf, accessed 14 October 2019.
4. Osage D.A. API 579: A Comprehensive Fitness-for-Service Standard. - In: ASME 2003 Pressure Vessels and Piping Conference: Flaw Evaluation, Service Experience, and Reliability. - Cleveland, OH, 2003, pp. 71-84, doi:10.1115/ PVP2003-2028.
5. Eiber R. J., Maxey W. A., Duffy A. R., Atterbury T. J. Investigation of the Initiation and Extent of Ductile Pipe Rupture. Quarterly Progress Report, July-September 1967 / Tech. Rep. - Columbus, OH: Battelle Memorial Institute, 1967.
6. Eiber R. J., Maxey W. A., Duffy A. R., Atterbury T. J. Investigation of the Initiation and Extent of Ductile Pipe Rupture. Quarterly Progress Report, October-December 1967 / Tech. Rep. - Columbus, OH: Battelle Memorial Institute, 1968.
7. Kiefner J. F., Maxey W. A., Eiber R. J., Duffy A.R. Failure Stress Levels of Flaws in Pressurized Cylinders. - In: STP536 Progress in Flaw Growth and Fracture Toughness Testing. - West Conshohocken, PA: ASTM International, 1973, doi:https://doi.org/10.1520/STP49657S.
8. Kiefner J. F., Vieth P. H. A Modified Criterion for Evaluating the Remaining Strength of Corroded Pipe / Final Rep. on Project PR 3-805. - Washington, DC: Pipeline Res. Committee, American Gas Association, 1989.
9. Maxey W. A., Kiefner J. F., Eiber R. J., Duffy A. R. Ductile Fracture Initiation, Propagation, and Arrest in Cylindrical Vessels. - In: STP514 Fracture Toughness: Part II. - West Conshohocken, PA: ASTM Internat., 1972, doi:https://doi.org/10.1520/STP38819S.
