Which fluid is used in leak test?

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Leak testing calls for different fluids depending on the type of system and targeted sensitivity. Among the usually utilised fluids are air, water, inert gases like nitrogen or helium, and tracer gases like hydrogen or helium. We run simple tests with air, while systems designed to contain liquid pressure run with water. When safety is a consideration, we choose inert gases like nitrogen as they are not reactive. We utilise helium for sensitive leak detection since its small molecular size allows it to seep out of fairly fine pores. It is thus useful in tiny leaks in vacuum equipment or in high-pressure surroundings. We also utilise hydrogen as a tracer gas; but, we exercise care given its volatile nature. For some jobs, such as locating pipeline leaks, dimethyl sulphide and other specific fluids are utilised as their strong scents can identify holes even in subsurface networks. The system type, safety requirements, and necessary degree of sensitivity specify the fluid to employ.System type, safety criteria, and required degree of sensitivity define employed values.

Q. Which fluid is used in leak test?

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