Medical Gas System Testing

• Installation complete with all open ends closed.
• Up-to-date drawings, a valve schedule and a terminal unit list available.
• A written test plan agreed with the owner or consultant.
• Coordination with departments if part of the facility is already operating.

The network is pressurised with an inert test gas and monitored for a defined period to confirm pressure stability. Any drop means a leak that must be located, repaired and the test repeated from the start. Attributing a drop to other factors without verification is not acceptable.

This is the most important test in the system. All lines are depressurised, one line only is pressurised, and every terminal unit in the facility is checked to confirm gas is present only at that line's outlets. The procedure is repeated for each service. The objective is to prove that an oxygen outlet is genuinely fed by oxygen and nothing else.

The network is purged with its own service gas to clear residual test gas and particulates, then gas is verified at terminal units for correct identity and freedom from moisture and contaminants. Verification is best performed at the most remote and most complex points on the route.

Each outlet is tested for tightness, correct connect/disconnect action, and its ability to deliver the required flow without unacceptable pressure drop. The test is also run with several points loaded simultaneously to simulate real operation.

• Simulating low and high pressure conditions and confirming the correct alarm on the correct panel.
• Verifying source status signals (manifold changeover, plant status).
• Testing audible alarm, mute and reactivation.
• Issuing a test report documenting each result with its date and responsible party.
• Handing over as-built drawings, the valve schedule and staff training.

Technical requirements are applied according to the specifications and regulations in force for the project and its approved design.