The plates we could not read
Six hundred and twelve containers came in last year with UN markings we could not fully read. Every one of them lost access to regulated service permanently. Here is how each plate got destroyed.
- Sheet
- 20
- Revision
- 2026-10
- Scale
- 1:1
- Drawn at
- Peoria IL
A UN marking that cannot be read is a UN marking that does not exist. There is no re-certification path for an anonymous container, no authority to appeal to, and no amount of cleaning that brings it back.
That is worth stating bluntly because the economic consequence is large and invisible. A container with a legible plate and a documented history is worth 30 to 60 percent more than a physically identical container without one, and the difference is entirely paperwork.
| How the plate was destroyed | Containers | Avoidable? | Note |
|---|---|---|---|
| Painted or wrapped over | 184 | Entirely | Branding applied straight across the plate |
| Close-range pressure washing | 147 | Entirely | The most common self-inflicted cause |
| Corrosion, stored on bare ground | 112 | Mostly | Base-rail moisture wicking up the post |
| Ground off deliberately | 81 | Entirely | Usually to hide a previous owner |
| Abrasion from strapping | 58 | Entirely | No corner boards, strap across the plate |
| Impact damage | 30 | Partly | Forklift strike on the plate face |
Four hundred and seventy of these were preventable
Painting, pressure washing, grinding and strap abrasion account for 470 of the 612. None of them required bad luck. All of them happened because the person doing the job did not know the plate was the container's certification rather than a label.
What the code actually says
| Field | Example | Meaning |
|---|---|---|
| Design type digits | 31 | Rigid IBC for liquids |
| Material letters | HA | Plastics inner receptacle, steel outer casing |
| Category digit | 1 | Rigid outer casing — the cage |
| Packing group | Y | Packing groups II and III |
| Date | 0126 | January 2026 manufacture |
| Country | USA | Authorising state |
| Maker code | M5678 | Manufacturer and design type |
- The marking covers transport safety. It says nothing about food grade and nothing about what was last inside.
- Leak-tightness re-test every 2.5 years, full re-test every 5, under US practice — and those records live separately.
- A rebottled container keeps its cage marking only with a documented rebuild record.
- Cutting a container for any modification voids the rating permanently. No exceptions.
Read your own plate
Type the code into our decoder and it will take it apart field by field, including what it rules in and out.
The four-second habit
- Photograph the plate when a container arrives, and store the image against the serial. Four seconds.
- Never paint, wrap, sticker over or abrade the plate. Put branding on the front panel, not the upright.
- Keep the pressure washer lance more than a foot from the plate face, and never use a turbo nozzle on it.
- Store on concrete or asphalt. Base-rail corrosion climbs, and it takes the plate with it.
- Corner boards wherever a strap crosses tube — they protect the galvanising and the plate in one move.
- If the plate is already gone, downgrade the container honestly and sell it for non-regulated duty. Pretending otherwise is somebody else's audit finding.
All 612 of those containers found work. Non-potable water, upcycle builds, storage, hoppers, cage-only duty. Nothing was wasted. They just all took a permanent pay cut for reasons that a photograph and a bit of care would have prevented.