Nitrogen Refrigerated Liquid Aluminium Signage
Size : 500 X 800mm
Material : Aluminium
Print : High Quality Eco Solvent Sticker with Outdoor Anti UVC Matt Lamination Mount on Aluminium .
A Nitrogen Refrigerated Liquid Aluminium Sign is a critical piece of industrial safety equipment designed to provide high-visibility warnings and essential handling information in environments where cryogenic nitrogen is stored or transported.
Constructed from durable, weather-resistant aluminum, these signs are engineered to withstand the extreme temperature fluctuations and harsh environments typical of chemical plants, laboratories, and medical facilities.
1. Material and Build Quality
Substrate: Typically made from .040" to .080" thick rigid aluminum. This thickness ensures the sign does not warp or bend under physical stress or high winds.
Reflective Surface: High-quality versions use 3M Engineering Grade Reflective sheeting. This ensures the sign is legible at night or in low-light conditions when a flashlight or vehicle headlight hits it.
Coatings: The surface is often treated with UV-protective and anti-graffiti coatings, allowing the sign to remain vibrant and legible for up to 10 years outdoors without significant fading or corrosion.
2. Visual Layout and Color Coding
The signage follows international safety standards (such as ANSI Z535 or ISO 7010) to ensure instant recognition:
Header: Usually features a bold "DANGER" or "WARNING" header in white text on a red or orange background.
The UN Number: For refrigerated liquid nitrogen, the globally recognized UN 1977 code is prominently displayed, often in a dedicated orange panel.
Hazard Diamond (NFPA 704): Many signs include the NFPA "fire diamond":
Blue (Health): 3 (Can cause serious injury).
Red (Flammability): 0 (Non-flammable).
Yellow (Instability): 0 (Stable).
White (Special): SA (Simple Asphyxiant).
Pictograms: Standard icons include a green "Non-Flammable Gas" cylinder (Class 2) and a "Cryogenic/Cold Hazard" symbol showing a hand being affected by cold.
3. Essential Safety Information
The text on the sign provides life-saving instructions for personnel and emergency responders:
Primary Hazards: Clear warnings regarding Extreme Cold (-196°C / -321°F), the risk of Severe Frostbite, and the danger of Asphyxiation due to oxygen displacement.
PPE Requirements: Icons or text specifying the need for cryogenic gloves, face shields, and aprons.
Emergency Contact: Space for local emergency numbers (e.g., "In Emergency Dial 995") and specialist advice contacts.
4. Strategic Placement
Because liquid nitrogen can rapidly expand (1 unit of liquid becomes nearly 700 units of gas), these signs are strategically placed at:
Bulk Storage Tanks: Directly on or adjacent to large outdoor cryogenic vessels.
Entry Points: At the doors of laboratories or storage rooms to warn personnel before they enter a potentially oxygen-deficient atmosphere.
Transport Vehicles: Mounted on trailers or trucks (often as placards) to inform first responders of the contents in the event of a road accident.
Comparison of Signage Materials
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