Space Protected by Nitrogen Extinguishing Sign

Space Protected by Nitrogen Extinguishing Sign – IMO A.654(16) Fire Control Symbol FS0263

This Space Protected by Nitrogen Extinguishing sign identifies a compartment covered by a fixed nitrogen gas fire-extinguishing system, confirming that a fire in this space will be met with an inert gas flood designed to reduce oxygen levels below the point of combustion. The pictogram shows the standardised dispersal nozzle symbol with “N” designator, matching exactly what appears on the vessel’s fire control plan for this location. As SKU FS0263 in the Fire Fighting Signs range, it is designed for permanent fixing at the entrance to machinery spaces, engine rooms and other enclosed areas protected by fixed nitrogen suppression.

Knowing that a space is protected by nitrogen extinguishing is critical safety information, since a nitrogen flood displaces breathable oxygen and personnel must evacuate before or immediately upon system activation, which makes fast, confident identification of nitrogen-protected zones essential for crew safety as well as fire control plan reviews and genuine incident response. Clear signage also supports routine fire equipment rounds, where crew confirm nitrogen system coverage remains intact and correctly matched to the vessel’s approved fire safety design. The photoluminescent background of this sign keeps the marking identifiable during a blackout, exactly when understanding which suppression system covers a space becomes part of both firefighting strategy and personal safety decisions.

Why Space Protected by Nitrogen Extinguishing Identification Matters

Crew need to know immediately which spaces rely on nitrogen gas suppression, since evacuation before system discharge is a life safety requirement, not just a firefighting consideration. Correctly signed nitrogen-protected spaces also support fire drills and safety inductions, helping new crew understand the evacuation procedures specific to gas-flooded compartments before ever needing to respond to a real activation. This distinction matters particularly in engine rooms and machinery spaces, where nitrogen systems are a common choice for protecting valuable equipment without the water damage associated with sprinkler systems.

Compliance and Certification

This sign reproduces the fire control symbol set derived from IMO Resolution A.654(16) and continued under the current ISO 17631 standard for fire control plan graphics, matching what flag-state surveyors and classification societies expect to see identifying nitrogen-protected spaces. SOLAS Chapter II-2 sets requirements for fixed gas fire-extinguishing systems protecting machinery spaces, including the evacuation alarms and warning signage required before discharge, and correctly labelled coverage markers are part of demonstrating that this system is genuinely in place during Port State Control inspections and class surveys. Fitting SKU FS0263 keeps your nitrogen system signage matched to the fire control plan surveyors will reference.

Installation Recommendations

Fix this sign at the entrance to or within the space protected by the fixed nitrogen system, using the pre-drilled fixing holes for a permanent mechanical fixing or the self-adhesive backing on smooth painted surfaces. In machinery spaces and engine rooms exposed to vibration, heat and oily residue, a screw or rivet fixing will outperform adhesive over the vessel’s operating life, and the sign should remain visible even when other equipment is temporarily stowed nearby. Check the sign periodically during routine fire equipment rounds to confirm it remains legible and accurately reflects the space’s current nitrogen protection coverage.

• Standard IMO/ISO 17631 fire control symbol – dispersal nozzle pictogram with “N” designator
• Photoluminescent base for visibility during blackout or power failure
• 150x150mm rigid or self-adhesive format to suit steel, aluminium or GRP surfaces
• UV-stable, corrosion-resistant construction for machinery space and engine room use
• Matches fire control plan symbols exactly for fast, confident coverage identification

Order the FS0263 Space Protected by Nitrogen Extinguishing sign to keep every gas-protected zone on your vessel clearly identified before your next drill or inspection. Safety Sign Hub stocks the complete IMO fire control symbol range and ships marine-grade signage across Australia and to vessels in port.

Browse the full Fire Fighting Signs range for every fire control plan symbol your vessel needs, or see our Hazard Signs for ISO 7010 warning pictograms to complete your safety signage programme.