Black cylinder on green background placard endorsement
A black or white gas cylinder on a green background is the Division 2.2 non-flammable gas placard. Green means non-flammable gas, the cylinder symbol shows it is a compressed gas, and the number 2 confirms the gas class. Examples include nitrogen, helium, and carbon dioxide as a gas.
What the green cylinder placard is
The placard with a gas cylinder on a green background is Division 2.2, non-flammable, non-toxic gas. The cylinder symbol pictures a compressed gas container, the green color signals that the gas does not burn, and the number 2 at the bottom point places it in the gas class. All three cues point to the same thing.
What non-flammable gas means
These are gases that are under pressure but do not catch fire, such as nitrogen, helium, argon, and carbon dioxide in gas form. The hazard is mainly the pressure and the potential to displace oxygen, not fire. That is why they get green rather than the red used for flammable gases.
Where it sits among the gas divisions
Class 2 has three divisions, separated by color:
| Division | Color | Hazard |
|---|---|---|
| 2.1 | Red | Flammable gas (propane, LNG) |
| 2.2 | Green | Non-flammable gas (nitrogen, helium) |
| 2.3 | White | Toxic gas (skull symbol) |
Green is the non-flammable gas division. Confirm specifics in your official manual.
Why color separates the gases
All three Class 2 divisions are gases, so the number 2 alone will not tell them apart. Color does the work: red for flammable, green for non-flammable, white for toxic. The cylinder symbol can appear on the non-flammable placard, while a flame marks the flammable one and a skull marks the toxic one.
How to remember it
Pair green with safe-to-not-burn: a green cylinder is a gas that will not catch fire, like the nitrogen or helium in an industrial cylinder. Drill it alongside the red flammable gas and the white toxic gas so the three Class 2 colors stay distinct. Verify the exact materials and rules in your official state CDL manual.
Frequently asked questions
- What is the green placard with a cylinder?
- Division 2.2, non-flammable gas. The green color means non-flammable, the cylinder symbol means compressed gas, and the 2 is the gas class. Examples include nitrogen and helium. Confirm in your official manual.
- What does a non-flammable gas placard cover?
- Compressed gases that do not burn, such as nitrogen, helium, argon, and carbon dioxide gas. The main hazard is pressure and oxygen displacement, not fire.
- How do the Class 2 gas divisions differ?
- By color: red is flammable gas (2.1), green is non-flammable gas (2.2), and white with a skull is toxic gas (2.3). All carry the number 2.