Pressure hold test on gas train regulators and valves: what it can indicate

The pressure hold test monitors pressure behavior in an isolated section to detect potential internal leakage from a valve or regulator.

Basic principle

The section is stabilized at a specific pressure and monitored for a defined time.

What it can indicate

An unwanted increase or decrease in pressure may indicate leakage through seat or a leak at another point within the test volume.

Temperature

Temperature fluctuations must be taken into account before reaching a conclusion.

Safety

The test must be performed only using the approved procedure and within the permissible pressure limits of the components.