Chemical exporters
DG-classified liquids and solids shipped under IMDG where the consignee's customs demands a UN-marked IBC.
Hazardous Goods Transport
UN Certified Stainless Steel IBC — Type Approval, Marking and Test Documentation Handled Properly
Buyers searching for a “31A” IBC usually mean a metal IBC with a UN packaging code. Here is exactly what Baoxiang can certify, mark and document — and how design changes are managed after approval.
Overview
What it is, and what it survives
UN certification is a paperwork-and-discipline product, not just a tank. Each approved design carries a type approval certificate, a type number, and a packaging code such as 11A/Z, stamped or labelled on the container and mirrored in the shipping documents.
Baoxiang's metal IBC design BX-FO1-2200L holds a Certificate of Type Approval for IBCs issued by China Classification Society (CCS), with UN marking 11A/Z/nny/CN/II×1/X30/240/1822 — a 2,230-litre metal IBC for packing group II duty, tested at normal filling/discharge pressure. Multiple product models have passed UN certification issued by CCS.
The UN code itself is a language: “11” means a metal IBC with a flat bottom for liquids, “A” is the steel/other-metal material category as issued, the letter after the slash (Z) covers the loading/pressure class, and the trailing series records the test and packing-group data. If your tender names a different code, confirm it with your DG desk first — we will tell you honestly whether it is inside an existing approval or requires a new test cycle.
Key features
Engineering that shows up in service
- Type-approved design, approved drawing set and prototype test report held together — documents match the steel you receive
- For hazardous-goods IBCs, design changes (material, critical dimensions, ports, structure) are reviewed against the existing approval before production, so your certification never drifts
- Marking, serial and traceability information applied per the approval scope
- Technical file support for IMDG-based ocean shipments: approval documents, test documentation and packing declarations coordinated with your forwarder
- If your route requires a marking we do not yet hold, we quote the additional test and certification scope up front — no surprises after the PO
| Approval example | BX-FO1-2200L — Certificate of Type Approval for IBCs, China Classification Society (form TAC113, No. DL24S3017, issued 2024-05-22) |
|---|---|
| UN marking | 11A/Z/nny/CN/II×1/X30/240/1822 (as issued on the certificate) |
| Body material | SUS316L (JIS G4305), 2.0 mm minimum |
| Capacity / tare | 2,230 L capacity at 20 °C; tare 420 kg |
| Design range | −20 to −40 °C design temperature; max gross 1,822 kg MPGW |
| Discharge | Butterfly valve 316L, DN250; PTFE + NBR seals |
| Service cargo on file | Activated carbon (IMDG code applicable) |
| Scope note | Other models have passed UN certification issued by CCS; the applicable type number, marking and cargo scope is confirmed per order |
Applications
Where this container earns its keep
Activated carbon & powders
Dry cargo IBCs such as the approved 2,230 L carbon service design.
Contract manufacturers
Multi-country programs where one SKU must satisfy several DG desks with matching paperwork.
FAQ
Buyer questions on this product
Is “UN 31A” a real code?
Buyers often write 31A when they need a UN-certified metal IBC. The UN packaging code for a metal IBC for liquids starts with 11 (e.g. 11A with Z pressure class); codes beginning 31 cover different packagings. Send us your exact required marking from your DG documentation and we will confirm what our approvals cover.
Can you certify a custom size under UN?
Custom dimensions, ports or materials affect an existing approval. We review the impact before production and, where a new approval or test is needed, we quote that scope and timeline explicitly.
Related
Often specified together
Flagship Product
Stainless Steel IBC Tote Tank
Framed and frameless stainless steel IBC tote tanks in SS304 or SS316L — 1,000 to 3,000 L typical, 20–45,000 L range, for chemical, food and pharmaceutical liquids.
View specification
Dry Bulk & Powders
Stainless Steel Powder Silo
Powder silos and handling vessels with engineered hopper angles, discharge outlets and dust-tight interfaces — sized to the flow behaviour of your material.
View specification
Fabricated Process Vessels
SS Welded Vessel
Custom welded stainless vessels — filter tanks, mixing vessels, jackets and assemblies — engineered with TIG, laser and automatic welding under documented inspection.
View specificationSend your medium sheet. Get a drawing.
Capacity, grade, ports and paperwork quoted against your actual duty — detailed quotation within 48 hours of confirmed requirements.