How To Apply UN 3090 Marking For Air, Road, And Sea Shipments

UN 3090 Marking The UN identification marking for lithium metal batteries shipped by themselves. Applying this marking correctly requires matching visual marking, supplementary information, and documentation to the mode of transport and the applicable packing instruction.

The steps below are practical actions warehousing and shipping teams can follow to ensure compliance when preparing packages subject to UN 3090. The checklist covers pre-offer verification, marking application, documentation, and carrier handoff for road, air, and ocean movements.

Step 1 — Confirm Classification And Testing

Before packaging, the shipper must confirm the cells or batteries are lithium metal chemistry and that the manufacturer or test laboratory has performed the relevant UN tests where required. Documentation of testing or a manufacturer declaration is often needed during acceptance and should be retained by the shipper.

Step 2 — Choose Approved Packaging And Packing Instruction

Select packaging that meets the packing instruction tied to UN 3090 for your mode of transport. This commonly includes inner supports, insulation to prevent short circuits, and sufficient strength to withstand handling. Follow the maximum quantity and net weight limits stated by the regulation.

Step 3 — Apply The Correct Marking And Labels

Apply marks and labels consistently and visibly on the outer package surface. Key items to include:

• UN Number: Print "UN 3090" clearly on the outer package so it is readable after packing and handling.
• Lithium Battery Mark: Apply the lithium battery handling mark that corresponds to lithium metal batteries shipped by themselves. Ensure the mark meets size and contrast requirements in the relevant regulations.
• Additional Text: Where required, include the proper shipping name (e.g., "Lithium metal batteries"), an emergency contact phone number, and any special statements required by the modal rules.

Step 4 — Prepare Required Documentation

For air and many international movements, a dangerous goods declaration is necessary. Include the UN 3090 number, proper shipping name, number and type of batteries, and packing instruction reference. Retain test and compliance documentation and provide it upon request to carriers or inspection agencies.

Step 5 — Mode-Specific Considerations

Pay attention to additional mode-specific requirements:

• Air (ICAO/IATA): IATA DGR and ICAO Technical Instructions limit quantities per package and may require a state-of-charge declaration for certain rechargeable chemistries. Carriage by passenger aircraft is often restricted or prohibited for UN 3090. Emergency contact details are strongly enforced.
• Sea (IMDG Code): IMDG requires UN number marking and handling labels and applies stowage and segregation rules to prevent incompatible cargo adjacency.
• Road/Rail (49 CFR/ADR): Domestic rules require UN number marking and may require a shipper’s declaration for certain large shipments; verify local variations and carrier policies.

Step 6 — Carrier Acceptance And Handover

At carrier check-in, provide all documentation and ensure visible markings match the paperwork. Carriers will often inspect packages for correct marking, label placement, and packaging integrity. If discrepancies exist, expect delays or refusal of carriage.

Packaging And Marking Checklist For Shippers

• Classification Verified: Chemistry and UN 3090 classification confirmed and records available.
• Packing Instruction Followed: Packaging performance and inner packing prevent short circuits and movement.
• Mark Applied: "UN 3090" text and lithium battery handling mark visible and sized per regulation.
• Emergency Contact: 24/7 telephone number present when required by mode.
• Documentation Ready: Dangerous goods declaration and test data available for presentation to carriers.

Common Rejection Reasons And Fixes

Issue examples and straightforward remedies:

• Illegible Mark: Reprint the mark at required size and place it on a flat surface.
• Missing Documentation: Generate the required dangerous goods declaration and provide test documentation before re-offer.
• Improper Packing: Repack using the specified inner packaging and cushioning to prevent cell contact and damage.

Operational Tips For Warehouses

• Standardize Labels: Keep pre-printed compliant UN 3090 label templates to reduce human error.
• Train Teams: Regularly train receiving, packing, and dispatch staff on the visual cues and documentation required for UN 3090 shipments.
• Carrier Communication: Establish carrier-specific acceptance protocols to avoid surprises at tender.

In short, the UN 3090 Marking must be applied to packages of lithium metal batteries shipped by themselves together with appropriate packaging, labelling, and documentation. Following a stepwise verification, packing, and marking workflow reduces carrier refusals and safety risks across air, sea, and surface transport.