Best practices for ultrasound testing of steam traps
The most versatile and accurate steam system diagnostics tool kit available today is ultrasonic testing equipment. Ultrasonic steam trap testing is the final test method in the steam trap testing program for detecting faulty steam traps.
The ultrasonic unit allows the operator to hear sounds undetectable by the human ear. This equipment receives a high-frequency signal (typically between 20 and 100 kHz) and heterodynes the signal, providing an audible sound for the operator to hear with the aid of headphones. The sensitivity of most high-frequency monitoring equipment allows the testing person to hear not only completely failed steam traps (blowing steam), but even leaking steam from a steam trap in operation. This test method provides early signal of steam trap wear and is a predictive tool for steam trap monitoring.