Chlorine Gas Hazard Warning Sign – HS0063

Chlorine Gas Hazard Sign

The HS0063 chlorine gas hazard sign warns crew, engineers, and visiting contractors that chlorine gas is present, stored, or dosed within a compartment, and that unprotected exposure can cause serious respiratory injury. In brief, it uses the standard ISO 7010 pictogram for Chlorine, presented in the familiar black-on-yellow triangular warning format used throughout shipboard hazard signage. Its job is simple and immediate: stop anyone from entering, opening a valve, or breaking a seal without first understanding the airborne chemical hazard they are about to face.

Within Safety Sign Hub’s Hazard Signs range, SKU HS0063 sits alongside other gas and chemical warning signs marking process spaces and chemical stores on board. A chlorine gas hazard sign of this type is typically fitted at the entrance to chlorination rooms serving ballast water treatment, potable water disinfection, and sewage treatment systems, as well as at chlorine cylinder stores, dosing skids, and bunkering connection points. Anywhere chlorine gas is generated, stored, or metered on board, this sign gives crew and shore personnel warning before they proceed further.

As with the rest of the Hazard Signs range, this chlorine gas hazard sign is produced on rigid, marine-grade material engineered to withstand salt air, humidity, UV exposure, and the corrosive atmosphere typical of treatment spaces. It is available in rigid plastic or self-adhesive vinyl, with a photoluminescent option for compartments where emergency lighting may fail, keeping the pictogram visible when it matters most.

Why Chlorine Gas Exposure Matters

Chlorine is a powerful respiratory irritant that is dangerous even at low airborne concentrations, and a leak inside an enclosed chlorination room or gas store can incapacitate a crew member within seconds, long before an alarm is raised. Because the gas is heavier than air, it can pool at deck level and travel along passageways, putting personnel at risk well outside the immediate work area. A clearly posted chlorine gas hazard sign gives every person approaching the space the split-second warning they need to don appropriate respiratory protection, isolate the source, or evacuate rather than investigate blind.

Marking every chlorine-handling space consistently also supports the vessel’s safety management system. Officers running safety rounds, deck inspections, or permit-to-work checks rely on visible, unambiguous signage to confirm that known hazard points remain identified and that nothing has been removed, painted over, or obscured since the last audit.

Compliance and Certification

HS0063 reproduces a registered ISO 7010 pictogram, part of the internationally recognised system of safety symbols used so hazard warnings are understood regardless of language. General IMO guidance on shipboard safety signage, together with the broader SOLAS framework for safety of life at sea, expects hazardous compartments to be clearly and durably marked as part of a vessel’s overall safety arrangements. Maintaining an accurate, legible chlorine gas hazard sign at every relevant location also helps a vessel meet Port State Control and classification society survey expectations, where inspectors check that signage matches the compartments and processes actually in use on board.

Installation Recommendations

Fit this chlorine gas hazard sign at eye level on or immediately beside the entrance to any chlorination room, gas store, or dosing area, and repeat it on access hatches, cylinder cabinets, or piping manifolds where personnel might otherwise approach without warning. Keep the sign clear of obstructions, insulation lagging, and hoses, and check periodically that it remains firmly fixed and readable despite vibration, washdown, and salt spray.

• Reproduces the registered ISO 7010 pictogram for Chlorine hazard warning
• Rigid or self-adhesive marine-grade construction for permanent shipboard fixing
• Resists saltwater, UV exposure, and washdown without fading or delaminating
• Optional photoluminescent finish keeps the pictogram visible during power loss
• Sized and formatted for chlorination rooms, gas stores, and dosing skids alike

Order HS0063 to keep every chlorine-handling space on board correctly identified, and browse the full Hazard Signs range or the related Fire Fighting Signs to complete your vessel’s safety signage.