NITROGEN SYSTEM

• Inspected Nitrogen supply system for proper design, installation, and function.
Sizing and Capacity

• Inspected required source, main, and riser valves.
Location/Labeling                                  Valve Handles Locked or Secure

• Inspected regulators and pressure relieve valves.
Location                                               Correct Values

• Tested all area and master alarm functions.

• Inspected proper pressure switch and area alarm sensor locations.

• Tested Nitrogen system for allowable gas concentrations of >99% nitrogen.

• Tested Nitrogen system for particulate contamination in at least 25% of zones. Tested with 0.45 micron filter device

• Tested Nitrogen system for operational pressures of 160-185 psi at supply and at each zone.

• Tested each Nitrogen outlet for proper function, identification, and mechanical integrity.
Identified leaking/malfunctioning outlets
Identified outlets delivering substandard pressure/flow rate

• Tested Nitrogen zone shut-off valves for proper function, identification, adaptation, and mechanical    
   integrity.

• Checked Nitrogen zone valves for proper gas identification labeling.

• Tested Nitrogen operational pressures and flows at each outlet.
Outlets shall deliver 5.0 scfm with a pressure drop of not more than 5 psi and static pressure of 160-185 psi.

• Tested Nitrogen control panels for leakage and proper operation.

• Checked Nitrogen system components for proper installation (i.e.: Brazing, Labeling, Hanging, etc.).

• Checked for cross-connections.