Class 3 Hazards
Class 3 Hazards are flammable liquids with flash point no more than 60 ˚C (140 ˚F) and it also include combustible liquid with flash point below 93 ˚C (200 ˚F).
Class 3 Hazard has 4 divisions:
- Flammable Liquid
- Combustible Liquid
- Fuel Oil
A flammable liquid is a liquid having a flash point of not more than 60 °C (140 °F), or any material in a liquid phase with a flash point at or above 37.8 °C (100 °F) that is intentionally heated. The following exceptions apply:
- Any mixture having one or more components with a flash point of 60.5 °C (141 °F) or higher, that make up at least 99 percent of the total volume of the mixture if the mixture is not offered for transportation or transported at or above its flash point.
- Any liquid with a flash point greater than 35 °C (95 °F) which does not sustain combustion according to ASTM 4206.
- Any liquid with a flash point greater than 35 °C (95 °F) and with a fire point greater than 100 °C (212 °F) according to ISO 2592.
- Any liquid with a flash point greater than 35 °C (95 °F) which is in a water-miscible solution with a water content of more than 90 percent by mass.
Example: Spirit, Acetone, Ethanol
A combustible liquid has a flash point above 60.5 °C (141 °F) and below 93 °C (200 °F).
A flammable liquid with a flash point at or above 38 °C (100 °F) that does not meet the definition of any other hazard class may be reclassified as a combustible liquid. This provision does not apply to transportation by vessel or aircraft, except where other means of transportation is impracticable. An elevated temperature material that meets the definition of a Class 3 material because it is intentionally heated and offered for transportation or transported at or above its flash point may not be reclassified as a combustible liquid.
Example: Diesel fuel, Kerosene, Linseed oil
This placard is an alternative placard, which may be used for gasoline in non-bulk quantities.
This placard is an alternative placard, which may be used for fuel oil in non-bulk quantities.
The flash point is the lowest temperature at which a substance vaporises into a gas, which can be ignited with the introduction of an external source of fire.
The lowest temperature at which a volatile combustible substance continues to burn in air after its vapors have been ignited (as when heating is continued after the flash point has been determined) — compare ignition temperature.