Mistras, a global solutions provider for facility protection and industrial risk management, recently received authorization from the French Nuclear Safety Authority (ASN) to provide its customers with real-time radiography (RTR) services using the OpenVision system (reference number: T760556). Mistras is the first company to be authorized to provide this type of control on French territory.
This non-intrusive inspection method responds to a major problem encountered by manufacturers in a wide range of sectors: non-intrusive detection and prevention of corrosion under insulation on insulated and refrigerated piping lines.
The challenges of corrosion under insulation (CUI)
Corrosion under insulation (CUI), the consequences of which have long been underestimated, occurs when moisture manages to penetrate the insulation system. It is one of the most difficult corrosion processes to prevent, but also one of the most insidious: it can appear under an insulation system that appears visually to be in good condition. If not detected and corrected in time, CUI is often the cause of costly damage such as leaking pipes and major production losses, which can lead to dangerous situations.
Non-intrusive detection of corrosion under heat and cold insulation on piping systems
OpenVision uses real-time X-ray imaging to locate external signs of corrosion or corrosion precursors, such as expansion, loss of thickness through craters or moisture in the insulation.
The method makes it possible to observe external damage of less than 1 millimetre on insulated piping, position weld joints or pipe clamps, and locate weld seams beneath the insulation.
Much faster than traditional radiography, the method enables immediate identification and localization of dense areas, even during the day, thanks to the short beaconing distance, and without the need to remove insulation for inspection.
Where conventional radiography can only inspect individual elements for corrosion, real-time radiography enables continuous inspection of a complete isometry, environment permitting. This method saves the customer significant time, money and resources.
Mistras has already launched several OpenVision inspection campaigns, with conclusive results.
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