Every field on the plate

Bolted or riveted to the tubular cage of nearly every IBC tote is a small metal or plastic plate covered in codes and numbers. Most people never read it. That is a mistake, because that plate tells you exactly what the container was built for, whether it is still within its service life, and how much you can safely stack and load. As the person who signs off on compliance here, I read these plates all day. Let me walk you through one field by field.

Why the Data Plate Exists

The data plate is the container's identity document. Regulators, carriers, and inspectors all rely on it to confirm that the tote in front of them was manufactured to a tested standard and is being used within its limits. If the plate is missing, illegible, or does not match the product inside, the tote is effectively unusable for any regulated purpose. For a plain-English overview of how these ratings translate to real jobs, our buyer guide is a good companion to this article.

A tote without a readable data plate is not a bargain. It is a container you cannot legally verify, which means you cannot legally fill it with anything that matters.

The UN Code Line

The headline of the plate is the UN design type code. On a standard caged composite tote it usually reads something like 31HA1. Each character carries meaning:

• 31 tells you it is a composite IBC intended for liquids. A code starting 11 would be a solids IBC.
• HA describes the material combination. H is the rigid plastic inner receptacle, and the second letter describes the outer cage. HA is a plastic bottle inside a steel frame, which is the classic caged tote.
• 1 indicates the design pressure category.

You will also see a full marking beginning with the UN symbol, the packing group letter, and more. That fuller string is decoded in our companion article on UN markings; here we are focused on the plate as a whole.

Packing Group and What It Allows

The plate shows a letter, usually X, Y, or Z, that ties the tote to a packing group. This is one of the most important fields for deciding what you may put inside.

• X covers packing groups I, II, and III, the most hazardous down to least. An X-rated tote is approved for the widest range.
• Y covers packing groups II and III, medium and low hazard.
• Z covers packing group III only, low hazard.

Most reconditioned totes you will see for water-based, food, and agricultural liquids carry a Y rating. If your product is a higher hazard class, you need an X-rated container, and you should confirm this against the packing group of your specific product. Our grades reference explains how these ratings line up with the totes we sell.

Dates: Manufacture, Test, and Inspection

Three date-related fields decide whether the tote is still in service life.

• Date of manufacture: Usually shown as a month and year. Composite IBCs are generally restricted from filling with dangerous goods after a set number of years from this date, commonly five years, depending on the product and jurisdiction.
• Initial test date: The date the design type passed its qualification testing.
• Periodic inspection and test dates: Regulated totes require a leaktightness test at intervals and a more thorough inspection at longer intervals. These dates, often stamped separately on the cage, tell you when the container was last certified fit.

If those inspection dates have lapsed, the tote may still be perfectly usable for non-regulated product like rinse water, but it cannot legally carry dangerous goods until it is re-tested. This is exactly the kind of check that goes into our reconditioning process.

Stacking Load and Maximum Gross Mass

Two numbers govern how you handle the tote physically.

The stacking load, sometimes shown as a stacking test load in kilograms, tells you the maximum weight the tote can bear on top of it when stacked. Exceed it and the cage or bottle can deform or fail. If your plate shows a stacking load of, say, 1,600 kg, that is the total load the container beneath must support, not the weight of a single tote.

The maximum permitted gross mass is the total weight of the tote plus its full contents. Subtract the tare weight of the empty tote to find your usable payload. A typical 275 gallon tote of water runs well over a ton when full, so both of these numbers matter for racking and forklift capacity.

The plate also lists the rated capacity in liters and often the maximum filling or discharge pressure. Do not confuse nominal capacity with the fill line; leave headspace for expansion.

Putting It All Together Before You Buy

When I evaluate a tote, I read the plate in this order: container type, packing group, dates, then the load numbers. If any field is unreadable, the tote drops out of regulated service immediately. Here is the quick field checklist I use:

• Is the UN code appropriate for a liquid composite IBC?
• Does the packing group letter cover my product's hazard level?
• Are the manufacture and inspection dates within service life?
• Does the stacking load support my racking plan?
• Does max gross mass minus tare leave enough payload for my product density?

If you can answer all five with confidence, the tote is telling you it is fit for the job. If you are matching totes to a regulated product and want a second set of eyes, reach out through the contact page and we will read the plate with you before anything ships.