Accurate, non-invasive corrosion mapping and remaining-thickness assessment on pipes, tanks and pressure vessels — single-side access, no process shutdown required.
Wall Thickness Measurement (WT) is a non-destructive testing technique used to determine the remaining material thickness of pipes, pressure vessels, storage tanks, structural components and other assets. It is one of the most critical tools in asset integrity management, enabling operators to detect and monitor corrosion, erosion and other forms of material degradation before they lead to failure.
At MEM NDT Services, our wall thickness surveys employ pulse-echo ultrasonic testing (UT) and, where appropriate, electromagnetic methods to deliver precise measurements from a single accessible surface — meaning processes need not be shut down or components dismantled.
A calibrated ultrasonic transducer is coupled to the external surface of the component. A short burst of high-frequency sound is transmitted through the material; the time taken for the echo to return from the internal surface is converted into a thickness reading. Modern digital gauges provide real-time readout with resolutions as fine as 0.01 mm, supporting detailed corrosion-mapping grids across large surface areas.
All wall thickness inspections carried out by MEM NDT Services conform to applicable international standards and client specifications, including:
On completion of every wall thickness survey, MEM NDT Services provides a comprehensive inspection report including: measurement data tables, colour-coded corrosion maps (where applicable), minimum remaining thickness, estimated corrosion rate, recommended next inspection interval, and fitness-for-service commentary against applicable code allowable minimums.
Our inspections are carried out by personnel qualified and certified in accordance with ASNT SNT-TC-1A and ISO 9712, ensuring your data meets regulatory and client requirements.
