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Class of Liquid - PowerPoint PPT Presentation


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NFPA ® 30, NFPA ® 1, and IFC Flammable/Combustible Liquid Classification by Flash Point. Class of Liquid. Definition. Class III B. 200°F. (93°C). Class III A. Combustible. 140°F. ( 60°C ). Class II. 100°F. (37.8°C). Class IC. Flammable. 73°F. (22°C). Class 1B

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slide1

NFPA® 30, NFPA ® 1, and IFC

Flammable/Combustible Liquid Classification by Flash Point

Class of Liquid

Definition

Class III B

200°F

(93°C)

Class III A

Combustible

140°F

(60°C)

Class II

100°F

(37.8°C)

Class IC

Flammable

73°F

(22°C)

Class 1B

Boiling Point at or above 100°F (37.8°C)

Class 1A

Boiling Point less than 100°F (37.8°C)

Flash Point Temperature

slide2

New OSHA - GHS Harmonization

Flammable Liquid Classification by Flash Point

Notes

1) When a Category 4 flammable liquid is heated for use to within 30 °F (16.7 °C) of its flashpoint, it shall be handled in accordance with the requirements for a Category 3 liquid with a flashpoint at or above 100 °F (37.8 °C).

2) When a Category 3 liquid with a flashpoint at or above 100 °F (37.8 °C) is heated for use to within

30 °F (16.7 °C) of its flashpoint, it shall be handled in accordance with the requirements for a Category 3 liquid with a flashpoint below 100 °F (37.8 °C).

3) When liquid with a flashpoint greater than 199.4 °F (93 °C) is heated for use to within 30 °F (16.7 °C) of its flashpoint, it shall be handled in accordance with the requirements for a Category 4 flammable liquid.

Class of Liquid

Definition

199.4°F

(93°C)

Category 4

140°F

(60°C)

Category 3

Flammable

100°F

(37.8°C)

73°F

(23°C)

Category 2

Boiling Point above 95°F (35° C)

Category 1

Boiling Point at or less than 95°F (35°C)

Flash Point Temperature