The use of ultrasonic devices for non-destructive testing (NDT) has become more common in recent years as equipment has increased in capability and decreased in price. Ultrasonic NDT devices work by creating a pulse of high-frequency sound, generally in the range of 2.5Mhz to 10Mhz, and then measuring the return, a process that makes it possible to measure and resolve anything from the simple thickness of a material through to corrosion and even weld or flaw inspection.
The use of ultrasonic NDT devices is attractive because of their non-invasive nature. They don’t require a plant shutdown to obtain a measurement. However, deploying this kind of device within a hazardous (classified) location has implications for safe use that even NDT inspectors may not be fully aware of.
This ‘Ultrasonic Thickness Gauges in Potentially Explosive Environments’ white paper covers the basics of Ultrasonic measurement, measurement accuracy, corrosion inspection, and intrinsically safe requirements for hazardous areas.