The SubCTest Demo project has been conceived by the SMEs with the intention to exploit a new market with the potential for huge growth – NDT for off-shore subsea structures using the SubCTest System at depths up to 100 meters (link to About). The SubCTest Demo project will allow the SMEs to demonstrate and validate their system for the purpose of establishing a lead in this emerging market and in addition, provide NDT services and components to oil/platform operators and potentially to the offshore wind turbine sector. The SMEs will draw upon their in-house development capabilities and call upon the support of the participating research organisation, all of whom were involved in the preceding SubCTest project. The developments provided by SubCTest demo project, will deal with the threat of advanced NDT inspection systems for subsea structures.
During the previous SubCTest project ACFM and LRUT sensors were implemented and developed to meet prescribed specifications. A scanning manipulator for the ACFM sensor array and a clamping manipulator for the LRUT transducer array were developed. ACFM sensors detected surface defects on complex subsea weld geometries such as node welds. Node welds occur when two cylindrical sections, of different sizes, meet at an angle. However, SubCTestDEMO will propose the replacement of this system based on EMAT technology and more focused for local corrosion detection. This technique was already investigated in the previous project but not implemented to the prototype. The LRUT will work to define these local corrosion areas as long range corrosion detection.
In the following figure you will find the TRL achieved in the previous project for all the components forming the LRUT system tool.
SubCTest Demo, will demonstrate a robust NDT system that will reliably inspect a variety of sub-sea structures, including jacket braces and nodes, risers, flow lines and mooring chains. Validation of the LRUT and EMAT manipulator systems (clamping and scanning respectively) will be demonstrated and an analysis of the achieved accuracy will be conducted. Validation procedures will test both the reliability and robustness of the NDT system within prescribed offshore structures.