August 5, 2017

Best Practice No. 5 – Steam Valve Testing

Steam valves installed in plants create a perplexing problem: determining whether the valve has internal leakage. Internal steam valve leakage is one of the most difficult failures to analyze and costs plants millions of dollars a year. It is very difficult, if not impossible, to determine whether a steam valve is leaking by studying its body temperature profile. The most reliable test method for internal steam leakage is using ultrasound at high frequencies above 25 kHz. Every test method has good and a few not-so-good attributes, but high-frequency ultrasound has proven to be an easy and accurate test method in 98% of applications.

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