Print Email Facebook Twitter Experimental results of guided wave travel time tomography Title Experimental results of guided wave travel time tomography Author Volker, A.W.F. Mast, A. Bloom, J.G.P. TNO Industrie en Techniek Publication year 2009 Abstract Corrosion is one of the industries major issues regarding the integrity of assets. Currently inspections are conducted at regular intervals to ensure a sufficient integrity level of these assets. Both economical and social requirements are pushing the industry to even higher levels of availability, reliability and safety of installations. The concept of predictive maintenance using permanent sensors that monitor the integrity of an installation is an interesting addition to the current method of periodic inspections reducing uncertainty and extending inspection intervals. Guided wave travel time tomography is a promising method to monitor the wall thickness quantitatively over large areas. Obviously the robustness and reliability of such a monitoring system is of paramount importance. Laboratory experiments have been carried out on a 10″ pipe with a nominal wall thickness of 8 mm. Multiple, inline defects have been created with a realistic morphology. The depth of the defects was increased stepwise from 0.5 mm to 2 mm. Additionally the influences of the presence of liquid inside the pipe and surface roughness have been evaluated as well. Experimental results show that this method is capable of providing quantitative wall thickness information over a distance of 4 meter, with a sufficient accuracy such that results can be used for trending. The method has no problems imaging multiple defects. Subject ElectronicsCorrosion monitoringDispersionGuided waveInversionParameterizationTomographyTravel timeUltrasonic To reference this document use: http://resolver.tudelft.nl/uuid:5a6dfa26-687c-45ae-8c73-b287ebc26adc TNO identifier 347452 Publisher AIP ISBN 9780735407480 ISSN 0094-243X Source 36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2009, 26-31 July 2009, Kingston, RI, USA, 1211, 2052-2059 Series AIP Conference Proceedings Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.