THMG508 – DOT Class 3

The HazMat Guys: Archives

THMG508 – DOT Class 3 | Part I

August 08, 2025

We jumped back in with DOT Class 3 hazmat and covered a ton of ground - so much, in fact, that we couldn’t fit it all into one episode.

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ObexionFR

ObexionFR is a mobile solution for first responders dealing with lithium battery fires, created by former FDNY Hazmat experts. It uses advanced science to neutralize fires by addressing heat, oxygen, and fuel, quickly containing and extinguishing them while keeping toxic gas levels safe. The process cools the battery, isolates oxygen, and prevents further ignition, providing a reliable tool for challenging battery fire incidents. Check it out.

908 Devices

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FSS

Fire Suppression Solutions, based out of Slinger, Wisconsin is the U.S. master distributer for multiple game-changing solutions that help protect communities, businesses, and individuals. Their partnership with LifeSafe Technologies has delivered TRF (Thermal Runaway Fluid), a product that has proved to extinguish Lithium-ion battery fires. Yes, it's a bold claim, but they have the testing to back it up. To learn more about this and their other lifesaving products, visit Fire Suppression Solutions. UL for class A and B fires, BSI for 10 categories including lithium-ion batteries

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Episode Overview

In this engaging follow-up to the previous episodes on gases, our hosts delve deep into the world of DOT Class 3 hazardous materials—flammable liquids. With humor, real-world anecdotes, and hands-on examples, they break down everything from identifying these materials to understanding their containers, hazards, and transport regulations. Whether you're in hazmat training or just curious about the science behind flammable substances, this episode offers a dynamic and practical guide.

Segment Breakdown & Timestamps

00:00 – Introduction & Transition from Class 2 to Class 3

05:02 – What Makes a Liquid Flammable?

06:09 – Placards, Labels & Bulk Packaging Rules

08:17 – Real-World Example: Perfume Truck

09:11 – Vapor Behavior & The “Heat Shimmer”