Flammable Liquids

Class IA:
Liquids having flash points below 73°F (22.8°C) and having a boiling point below 100°F (37.8°C).
Class IB:
Liquids having flash points below 73°F (22.8°C) and having a boiling point at or above 100°F (37.8°C).
Class IC:
Liquids having a flash point at or above 73°F (22.8°C) and below 100°F (37.8°C).

Combustible Liquids

Class II:
Liquids with flash points at or above 100°F (37.8°C) and below 140°F (60°C).
Class III:
Liquids with flash points at or above 140°F (60°C).
Safety Can:
An approved container, of not more than 5-gallons capacity, having a spring-closing lid and spout cover and so designed that it will safely relieve internal pressure when subjected to fire exposure.
Figure 10.5
Safety Cans

Many types of containers are required depending on the quantities and classes of flammable or combustible liquids in use.

NFPA 30 Chapter 9 Table 9.4.3

Container
Type
Class IA Class IB Class IC Class II Class III
Glass 1 pt.
(0.47 L)
1 qt.
(0.95 L)
1 qt.
(0.95 L)
1 gal.
(3.79 L)
1 gal.
(3.79 L)
Metal or
Approved
Plastic
1 gal.
(3.79 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)
Safety
Cans
2 gal.
(7.58 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)
5 gal.
(18.94 L)

9.4.3.2

Class IA and Class IB liquids shall be permitted to be stored in glass containers of not more than 1.3 gal (5 L) capacity if the required liquid purity (such as American Chemical Society analytical reagent grade or higher) would be affected by storage in metal containers or if the liquid can cause excessive corrosion of a metal container.