Which class of combustible liquid has a flash point below 140°F?

The class of combustible liquid that has a flash point below 140°F is Class I. This classification is important for understanding the properties of various liquids and their associated hazards. Class I liquids are considered to be more flammable and pose greater risks in terms of combustion; they are further divided into subclasses based on their specific flash points and boiling points.

Class II liquids, in contrast, have a flash point of 140°F or above and up to 200°F, indicating they are less volatile and present a lower risk of ignition compared to Class I. Classes IIIA and IIIB include liquids with even higher flash points; Class IIIA has flash points between 200°F and 300°F, while Class IIIB contains liquids with flash points over 300°F, thus defining them as not flammable under standard conditions.

Understanding these classifications allows individuals to manage and respond effectively to situations involving combustible liquids, ensuring safety and compliance with regulations.