HSNO Classifications Hazard Pictogram Notes / Descriptions 2.1.1A UN Class 2.1 Flammable Gas: High Hazard Flammable Aerosols 2.1.1B Flammable Gases UN Class 2.2 Non Hazardous Gases Under Pressure: Compressed Gas High Pressure Liquefied Gas Low Pressure Liquefied Gas Dissolved Gas Refrigerated Liquefied Gas UN Class 2.3 Toxic Gas Refer HSNO Class 6.1A, B & C: … Continue reading Signage