In-service corrosion monitoring of an 11-bar steam line using TRND
A solution for high-temperature spot thickness measurements on a series of steam expansion loops was sought by TATA Steel UK, with the requirement to monitor any changes in remaining wall thickness due to corrosion / erosion whilst in-service with no loss of productivity.
The asset integrity team turned to the TRND system to overcome the challenges and risks posed by high-temperature, in-service inspection. The system, comprises HotSense high-temperature resilient, installed ultrasonic transducers (Ionix, UK), and an inductively coupled patch and a wireless data collection WAND (Inductosense, UK). TRND subsequently allows wall thickness data from the expansion loop pipe assets to be collected at temperatures up to 350 °C, with the low-profile sensors installed under insulation and weatherproofing, in a matter of seconds. This hybrid approach to inspection and monitoring removed the need for isolation of the asset, reduced costly estates & fabrics resources from not having to remove insulation or cladding, and prevented exposure of operators to unnecessary hazards.
The full case study can be found here.