Pressure decay has been the most widely used method of leak testing in manufacturing production lines for decades. The process is uncomplicated, inexpensive and easily automated. Air is simply injected into a test object and any decrease in air pressure over time signifies a leak. However, the pressure decay method has significant shortcomings such as limited sensitivity and the inability to determine leak location.
A relatively new technology, hydrogen leak testing, addresses these shortcomings. Hydrogen testing functions as an enhancement to pressure decay systems or as a substitute method, depending on the application. The hydrogen and pressure decay methods are complementary, utilizing similar test procedures and test apparatus.
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