NMFC 41160 - Empty Pressure Cylinders | Class N/A

Note 41162: NOTE-Cylinders from which material has been exhausted will be regarded as empty provided any residue of such material is at a pressure that is insufficient to allow its release.

To find the correct freight class for your shipment:

1. Confirm the cylinders are empty and note any residue from the last contained gas; select documents accordingly (declare as empty with residue if not cleaned).
2. Calculate handling-unit density for rating under Item 170 by using actual weight and the packed footprint of your pallet, rack, or crate.
3. Fit valve protection caps, close all openings, and secure each cylinder in chocks or cradles; band or strap bundles to prevent rolling during LTL transfers.
4. Separate steel, aluminum, and composite cylinders when practical to avoid abrasion and to maintain consistent density across handling units.

Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.

• Right-sized bundling to improve density can lower the resulting freight class and reduce base rates.
• Accurate hazmat declaration for empty cylinders with residue helps avoid reclass fees, penalties, and carrier refusals.
• Rigid racking and proper blocking minimize handling time and damage risk, cutting accessorials and claims.
• Following Item 170 guidelines creates predictable quotes across carriers and streamlines routing decisions.