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In non-destructive testing, a leak is defined as a hole, a porous area, a permeable area for gases or a different structure in the wall of a test specimen through which a gas can escape from one side of the wall to the other due to a difference in pressure or concentration. Expressed in simpler terms, leaks are small holes through which gases or liquids flow from the side of higher pressure to the side of lower pressure. A leak can be a harmless leak such as a dripping water faucet. Leaks involving the escape of aggressive media or toxic substances can have more serious consequences. Helium leak detectors are the ideal solution for leak detection and leak-tightness testing under vacuum.
The test gas Helium is safe and a small, light molecule which is suitable for detecting micro leaks. The detection range of Helium in vacuum tests lies between 10-2 and 10-13 Pa · m3/s. Helium leak detection is extremely accurate, quantitative and repeatable. Fast cycle times are a further advantage. Manual sniffing or spraying is often the easiest way to detect a leak with Helium gas.
Leak Detection is widely used in the oil & gas and petrochemical industries to detect the leaks.
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