Ask X3What does 49 CFR 173.120 (Class 3—Definitions) require?
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As an Ask X3 fleet-compliance assistant, here is what 49 CFR 173.120 requires according to the provided text:
* Define Flammable Liquids (Class 3): It defines a flammable liquid as any 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 and offered for transportation or transported at or above its flash point in a bulk packaging, subject to specific exceptions (such as liquids that do not sustain combustion, water-miscible solutions over 90% water, certain mixtures, etc.).
* Define Combustible Liquids: It defines a combustible liquid as any liquid that does not meet any other hazard class and has a flash point above 60 °C (140 °F) and below 93 °C (200 °F). It also allows flammable liquids with a flash point at or above 38 °C (100 °F) to be reclassed as combustible liquids (except for vessel or aircraft transport unless impracticable, or if heated and transported at or above their flash point). Combustible liquids that do not sustain combustion are not subject to the subchapter requirements as combustible liquids.
* Determine Flash Points: It sets out the exact minimum temperature requirements and approved test procedures (using specific ASTM or ISO methods depending on liquid viscosity, phase, and mixture characteristics) for determining a liquid's flash point.
* Provide Revisions and Transitional Rules: It allows the Associate Administrator to revise classifications based on actual hazard data, and outlines transitional provisions permitting older Class 3 classification criteria to be used until January 1, 2012.
Reference: 49 CFR 173.120.