2025 GAHFM Technical Education Conference-Medical_Gas_Permit_to_Work

Medical_Gas_Permit_to_Work_Form

Pdf Summary

This Permit to Work document outlines the procedures and safety measures required for maintenance or repair of medical gas systems, including oxygen, air, vacuum, N2O, CO2, and nitrogen. The permit captures essential details such as permit number, issue and expiration times, location, reason for work (preventive maintenance, repair, emergency, upgrade), gas type, involved technicians with certifications, company, and authorization.<br /><br />Key safety protocols include the use of oxygen-clean tools adhering to CGA G-4.1 standards, ensuring the area is free from ignition sources and hydrocarbons, mandatory personal protective equipment like gloves and face shields, assigning a fire watch when brazing or performing hot work, nitrogen purging during brazing, and verifying adequate ventilation.<br /><br />The permit requires isolating the work area by locating and closing the corresponding control or zone valve, tagging it with “DO NOT USE,” applying lockout/tagout procedures, confirming system pressure before commencement, and providing alternate gas supply if needed. Notification of affected staff and posting “Work in Progress” signage is mandated. <br /><br />Post-repair procedures involve visual inspection for proper labeling and indexing, performing pressure, flow, and leak tests compliant with NFPA 99 Section 5.1.12, confirming gas purity with an analyzer, purging with dry nitrogen if the system was opened, checking alarms (both master and area), and final verification by an ASSE 6030 certified verifier.<br /><br />Completion requires removal of lockout/tagout devices, reopening valves, notifying affected areas, and filing records in the maintenance log. The permit must remain posted onsite until the system is fully returned to service, maintaining compliance with NFPA 99 Section 5.1.14.<br /><br />Additionally, the document includes a backfeed map showing oxygen and medical air cylinder locations by floor and wing, detailing isolation via valves on the third floor that control floors 4, 5, and 6, essential for planning safe isolation during maintenance.

Keywords

Permit to Work

medical gas systems

oxygen-clean tools

CGA G-4.1 standards

lockout/tagout procedures

NFPA 99 compliance

pressure and leak testing

personal protective equipment

nitrogen purging

backfeed map