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Corrosion mapping

Corrosion mapping robot

Thickness measurements of tanks, pressure vessels, pipe work and other steel structures are an important part of periodic inspections and in some cases may be a statutory requirement.

JF NDT has a range of remote access crawlers fitted with ultrasound thickness measurement probes which can climb ferro-magnetic structures for repeatable and reliable inspections. Thickness measurements can be used to monitor for corrosion, erosion and defects including hydrogen blistering. The crawlers are also effective at inspecting vessel linings. 

JF NDT makes extensive use of remote access crawlers because they offer distinctive advantages for the delivery of cost effective services.

For corrosion mapping, JF NDT uses Silverwing RMS corrosion mapping systems. The RMS is a C-scan imaging system mounted on a magnetic crawler to enable reliable and safe remote access to ferro-magnetic structures. The RMS crawler has a scan width of 600mm for large areas and 300mm for more constricted surfaces and pipework. With a scan speed of up to 730mm/second, the RMS can rapidly map the thickness of a steel structure and automatically record the A-scan image, the C-scan image and the thickness measurement for analysis and reporting. In practice, with the 600mm scan width, 12m can be scanned in an hour. 

For thickness measurements, JF NDT employs Silverwing Scorpion crawlers. The Scorpion is a lightweight magnetic crawler with a 5MHz twin crystal transducer which records spot thickness measurements. The Scorpion crawler is capable of climbing any ferro-magnetic surface and is particularly manouevreable and suitable for recording thicknesses around pipe junctions and nozzles.