Which color placard is used for Class 2 flammable gases?

The correct answer is that Class 2 flammable gases are identified using a red placard. This classification is part of the system set forth by the National Fire Protection Association (NFPA) and the Department of Transportation (DOT) to ensure that hazardous materials, including flammable gases, are easily identifiable.

Red is specifically used to denote flames or fire hazards, which is directly relevant for Class 2 flammable gases as they can ignite and cause fire in the presence of an ignition source. The use of a red placard alerts first responders and others to the potential dangers associated with these gases, allowing for a swift and informed action in emergencies.

In this context, other colors represent different hazards: blue is typically used for health hazards, green designates non-flammable gases or gases that pose no special hazard, and orange may signify specific materials or applications but is not standard for Class 2 flammable gases. Understanding these color codes is crucial for safety and effective handling of hazardous materials.