Many energy conservation programmes begin with a steam trap survey, as leaking traps can add a considerable amount to the company's operating expenses.

At plants that don't have an active steam trap testing and repair programme, as many as half of the steam traps on-site could be faulty. With monthly inspections and prompt repairs, this figure could be reduced significantly, and ultrasound and infrared are two technologies commonly used to carry out this work.

Ultrasonic testing can quickly reveal the condition of each steam trap, and a number of manufacturers and service organisations (including Spirax Sarco) recommend the Ultraprobe for this application. Ultrasound is particularly effective as the operator can listen to what's happening inside the system and make a more informed decision.

Some instruments may also include PC software, which allows you to create inspection 'routes', keep thorough records of each steam trap and its condition, and generate any necessary repair work orders or reports.

Infrared cameras are also very suitable for quickly checking the operational state of a steam trap from distance, and can compliment an existing ultrasound programme to provide a comprehensive assessment of the steam systems on-site.