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Ultrasonic Testing (UT) inspections using Remotely Operated Vehicles (ROVs) are a cutting-edge technique employed in various industries, particularly in offshore and underwater applications. Ultrasonic testing is a non-destructive technique used to determine the thickness of metallic structures and detect material defects. High-frequency sound waves are used in ultrasonic testing to identify flaws in materials. This method combines the precision of ultrasonic testing with the versatility and reach of ROVs, allowing for thorough inspections of underwater structures, ship hulls, pipelines, and other critical infrastructure.
Regular inspections and maintenance of ship hulls are essential as they must withstand harsh environmental conditions.
Ultrasonic thickness measurement of the ship hull plates are crucial for ensuring the structural integrity and functionality of the vessel. These inspections help in analyzing potential structural failures, such as corrosion, and detecting any hidden defects.
EyeROV TUNA ROV (Remotely Operated Vehicle) was utilized to inspect the vessel's hull. The vessel owners wanted to assess the vessel's condition and measure the thickness of the hull at selected locations. EyeROV conducted both visual inspection and UT measurements by integrating UT probes into the EyeROV TUNA ROV. Both personnel and equipment were transported on board at the location, and the control station was set up on the jetty. The ROV was manually lowered from the jetty and the pilot guided it close to the vessel hull. The visual and thickness measurements of the hull were taken using a UT probe mounted on the ROV. Numerous UT points were measured in the specified area with thickness resolutions up to 1/100th of a millimeter with precise positioning of each point. A comprehensive visual inspection of the sea chest (3 nos), propeller (2 nos), and vessel hull were also performed.
HD visuals of the 3 sea chests and 2 jet propulsions were captured.
UT measurements of the areas of interest on the vessel were taken.
From the visual survey, it was observed that there was marine growth in the gratings of all sea chest openings and scattered marine growth of varying thickness in the jet propulsion outlets. The UT measurements of the area of interest were taken and found to be of consistent thickness and the plates were intact.
Regular vessel inspections are essential for maintaining the longevity, effectiveness, and security of marine vessels. These inspections evaluate the overall condition of a ship's hull, engines, and other systems to ensure they meet safety requirements and are operationally ready. Frequent and thorough inspections support the vessel's operational and commercial value while helping to maintain it in good condition and safeguarding human life, the marine environment, and the vessel itself.
