What is the difference between Class I liquids and flammable liquids?

Class I liquids are the most hazardous from a fire safety standpoint, while Class IIIB liquids are the least hazardous. Class IA liquids are liquids that have flash points below 73 °F (22.8 °C) and boiling points below 100 °F (37.8 °C). Additionally, unstable flammable liquids are treated as Class IA liquids.

What differentiates the four categories of a flammable liquid?

Categorization

• Category I flammable liquids are those with boiling points ≤ 95 °F (35 °C) and flash points < 73 °F (23 °C)
• Category II flammable liquids are those with boiling points > 95 °F and flash points < 73 °F.
• Category III flammable liquids are those with flash points > 73 °F and ≤ 140 °F (60 °C)

How do you classify flammable liquids?

Flammable liquids have a flash point of less than 100°F. Liquids with lower flash points ignite easier. Combustible liquids have a flashpoint at or above 100°F. The vapor burns, not the liquid itself.

What are the classifications of combustibles?

Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.

What is a Class 2 Division 2.1 hazardous material?

Division 2.1: Flammable Gases. These gases are known to ignite on contact with ignition sources. This includes acetylene, hydrogen, propane and many others.

What are Class II and Class III liquids?

Class II liquids are combustible liquids that have a flash temperature point at or above 100 °F (37.8 °C) and below 140 °F (60 °C). Class IIIB liquids are combustible liquids that have a flash point at or above 200 °F (93 °C).

What does a flammability rating of 1 mean?

Level 1 – Materials that are normally stable, but become explosive at elevated temperatures and pressure. ◆ Level 0 – Materials that are stable even under exposure to fire. A chemical hazard rating at the highest level should be given to a room if chemicals are present in quantities of five (5) gallons or more.

What are Class I II and III liquids?

What is class 2.1 flammable gas?

Division 2.1 – Flammable Gas – A material that is a gas at 20º C or below and. 101.3 kPa of pressure (ambient temperature and pressure), i.e. the material has a. boiling point of 20º C at sea level and: • Is ignitable when in a mixture of 13 percent or less by volume with air.