Class4

Class4 refers to a specific classification within a system, most commonly encountered in the context of fire extinguishers. In fire safety, Class4 extinguishers are designed to tackle fires involving metals. These are distinct from other fire classes (such as Class A for ordinary combustibles, Class B for flammable liquids, Class C for electrical fires, and Class D for combustible metals), and require specialized extinguishing agents. The types of metals that fall under Class4 fires can include magnesium, titanium, sodium, and potassium, among others. Water or other common extinguishing agents are generally ineffective and can even be dangerous when used on metal fires, potentially causing violent reactions. Therefore, Class4 extinguishers utilize specific powders, such as dry graphite or sodium chloride, that smother the fire and absorb heat without reacting with the burning metal. Proper identification and use of Class4 extinguishers are crucial for effectively and safely combating metal fires. This classification helps ensure that the correct safety equipment is available and that personnel are trained in its appropriate application.