IBC Intermediate Bulk Container Export Compliance
China Customs DG Certificate vs Maritime Class Society Certificate

1. What Is an IBC Intermediate Bulk Container

An IBC (Intermediate Bulk Container) is a rigid, semi-rigid, or flexible container with a capacity typically between 450 and 3,000 litres, used for bulk transport and storage of dangerous liquids and solids — including hazardous chemicals, solvents, agrochemicals, and industrial raw materials.

1.1 Main IBC Types

Type Code	Construction	Typical Capacity	Common Use
11A / 11B	Rigid metal (stainless / carbon steel)	500–3,000 L	Corrosive acids, high-hazard chemicals
21A / 21B	Composite (metal shell + inner receptacle)	450–3,000 L	Flammable liquids, corrosives
31A / 31B	Rigid plastics (HDPE)	450–3,000 L	Liquid chemicals, agrochemicals
31H1 / 31H2	Composite plastics (metal cage + inner bag)	1,000 L (tote/IBC)	Industrial liquids, chemical feedstocks
13H / 14H	Flexible woven / composite bags	500–2,000 kg	Solid bulk DG

1.2 The Dual Regulatory Dimension

2. Two Regulatory Systems: Customs vs Maritime

When exporting dangerous goods in IBC packaging from China, the same shipment is subject to two entirely independent regulatory authorities. They require different documents, issue certificates through different bodies, and inspect at different points in the export chain.

2.1 Regulatory Authority and Legal Framework

Dimension	Customs (GACC)	Maritime / Port Authority (MSA)
Authority	General Administration of Customs of China (GACC)	China Maritime Safety Administration (MSA) / Port Authorities
Core Regulation	Regulations on Safe Management of Hazardous Chemicals (SC Order No. 591) Administrative Measures on Export Packaging Inspection	IMDG Code (International Maritime Dangerous Goods Code) Maritime Traffic Safety Law of China
Cargo Classification	Hazardous Chemicals (HazChem) — based on China's Hazardous Chemicals Catalogue (GB 12268)	Dangerous Goods (DG) — based on UN Number system (9 classes)
Inspection Point	Customs declaration / release	Booking confirmation, DG declaration, port loading, destination PSC
Required Document	DG Packaging Qualification Certificate	IBC Type Approval Certificate (Class Society)

3. Customs Requirements: DG Packaging Certificate Explained

3.1 What Is the DG Packaging Qualification Certificate (危包证)?

The Dangerous Goods Packaging Qualification Certificate (commonly called "危包证 / wēi bāo zhèng" in Chinese) is issued by local Chinese Customs (formerly CIQ — Commodity Inspection and Quarantine) under the Administrative Measures on Inspection and Quarantine of Export Goods Packaging (GACC Order No. 15). It certifies that a specific consignment of hazardous chemicals is packed in a compliant container of a specified type and size.

3.2 Scope of Application

• Required for any export of hazardous chemicals listed in China's Hazardous Chemicals Catalogue (2015 and amendments) packed in IBC containers
• The certificate covers a specific cargo + specific packaging combination — it cannot be transferred between products, batches, or container sizes
• Validity: normally 12 months (some categories 6 months); expired certificates cannot be used

3.3 Application Process

• 1
  Prepare Packaging Documentation
  Provide IBC specifications, material certifications, manufacturer credentials, and the SDS (Safety Data Sheet). Confirm the packaging group (I/II/III) matches the cargo's UN Number requirements.
• 2
  File Application with Local Customs
  Submit a packaging qualification application via the "Internet + Customs" online portal, specifying cargo name, UN number, hazard class, and packaging group.
• 3
  Customs Inspection / Verification
  Customs officers verify that the IBC type matches UN performance test requirements (UN marking format, correct packaging combination). Physical sampling may be required.
• 4
  Certificate Issued
  Upon approval, the DG Packaging Qualification Certificate is issued and must be presented at the time of customs declaration for export release.

3.4 Key Elements of the DG Packaging Certificate

Element	Description	Risk if Wrong
Cargo Information	Product name, UN number, hazard class, packaging group	Must match customs declaration exactly — mismatch causes rejection
Packaging Specification	IBC type code, capacity, material, max fill quantity	Actual container used must exactly match certificate
Validity Period	Typically 12 months	Expired certificate is invalid — must reapply
Issuing Authority	Local Customs (e.g., Shanghai Customs, Ningbo Customs)	Certificates from other regions may require cross-recognition
Quantity Covered	Specific quantity approved for this certificate	Cannot exceed approved quantity; excess requires new application

4. Maritime Requirements: Class Society Certificate Explained

4.1 What Is the IBC Type Approval Certificate (Class Society)?

The IMDG Code (Chapter 6.5) requires that all IBCs used for the sea transport of dangerous goods must have undergone performance testing and type approval by a competent authority recognized under the flag state. In China, this means the China Classification Society (CCS) or another IMDG Code-recognized inspection body. For international trade, certificates from other flag state-recognized societies (BV, DNV, Lloyd's Register, etc.) are also accepted.

4.2 Legal Basis for Class Society Requirements

• IMDG Code Chapter 6.5: Design, construction, and testing requirements for IBCs (including performance test types, UN marking rules)
• IMDG Code Chapter 4.1: Packing provisions — specifies which IBC types are permitted for each UN Number
• Port DG Operations Safety Standards (JT 397): Requires verification of IBC type approval during port operations
• Port State Control (PSC): Foreign port inspectors can demand IBC certificates; deficiencies may result in cargo detention or ship deficiency notices

4.3 Key Elements of the Type Approval Certificate

Element	Description
Type Code	e.g., 31H1/Y/5000/S/CN/CCS/… — each segment indicates material type / packing group / max capacity / solid or liquid / country / certifying body
Test Requirements	Bottom lift test, top lift test, stacking test, drop test, leakproofness test, hydraulic pressure test (liquid IBCs), vibration test
Validity	Type approval is generally valid for 5 years; IBC must be retested upon expiry
Manufacturer Info	Manufacturer name clearly identified; physical IBC plate markings must match certificate exactly
Certifying Body	China Classification Society (CCS) or other IMDG Code-recognized organization

4.4 Maritime Inspection Points

• 1
  Booking Confirmation
  Carrier's DG department verifies the IBC type approval certificate number and confirms the IBC type is permitted for the cargo under IMDG Code Chapter 4.1.
• 2
  DGD (Dangerous Goods Declaration) Review
  The shipper submits the DGD specifying the IBC type code. Freight forwarder and carrier cross-check against the type approval certificate.
• 3
  Port Yard / Loading Operations
  Port tally staff and surveyors inspect IBC plate markings on physical units, confirming UN marking format matches the type approval certificate. Missing or non-compliant markings can result in loading refusal.
• 4
  Destination Port PSC Inspection
  Port State Control inspectors may audit IBC certificates upon arrival. Non-compliance triggers a Deficiency Notice and potential cargo detention.

5. Side-by-Side Comparison

Dimension	Customs: DG Packaging Certificate (危包证)	Maritime: IBC Type Approval Certificate (Class Society)
Issuing Body	Local Customs (GACC)	China Classification Society (CCS) or recognized equivalent
Legal Basis	Admin Measures on Export Packaging Inspection; Hazardous Chemicals Safety Mgmt Regulations	IMDG Code Chapter 6.5; Maritime Traffic Safety Law
Nature of Certificate	Batch-level compliance certificate (cargo + packaging combination)	Type-level structural/performance approval (IBC model)
Coverage	Specific cargo, specific batch, specific container type/size	All units of that IBC model (as long as plate marking matches)
Validity	12 months (some 6 months)	5 years (full retest required at expiry)
Inspection Point	Customs declaration (export release)	Booking, DG declaration, port operations, destination PSC
Applied for By	Exporter / customs broker	IBC manufacturer (applied to CCS for model type approval)
Relationship to Cargo	Must correspond to specific cargo (UN number, product name)	Independent of cargo — certificate belongs to the container model
International Recognition	Not recognized abroad (domestic administrative document only)	Mutually recognized across IMDG Code contracting states
Can They Replace Each Other?	❌ No — both are required simultaneously; they serve different regulatory purposes

6. Scenario Analysis: Which Certificate Is Needed When

6.1 Can the DG Certificate Replace the Class Society Certificate?

A frequent question in practice: "We already have the DG Packaging Certificate from Customs — can we submit that to the port or carrier instead of the Class Society Certificate?"

Similarly, a Class Society Certificate cannot substitute for the DG Packaging Certificate at Customs. The Class Society Certificate is a manufacturer-level technical approval for the container model — it does not validate the specific cargo/packaging match that Customs requires.

7. Common Misconceptions and Risk Alerts

7.1 Misconception 1: "The Class Society Certificate Is All We Need"

Many exporters receive the CCS Type Approval Certificate from their IBC supplier and assume this satisfies all export documentation requirements. In practice, Customs will still require the DG Packaging Certificate at declaration — without it, the customs declaration will be rejected.

7.2 Misconception 2: "One DG Certificate Covers All Similar Cargo"

The DG Certificate is specific to a particular cargo + particular container combination. It cannot be applied to different products, different IBC sizes, or batches beyond the certified quantity. Changing the IBC specification (e.g., switching from a 1,000L to 1,200L unit) requires a new application.

7.3 Misconception 3: "Any Class Society Certificate Is Fine"

When reviewing a Class Society Certificate, verify the following:

• Certificate validity — 5-year type approval; IBCs with expired approval cannot be used for dangerous goods sea transport
• The IBC plate marking (UN marking string) must exactly match the certificate type code
• The approved IBC type must be permitted for the specific UN Number under IMDG Code Chapter 4.1
• Whether the destination country has specific requirements regarding which class societies they recognize

7.4 Misconception 4: "Long-term Customers Don't Need Re-verification"

7.5 Risk Summary: Consequences of Missing Documents

Missing Document	Stage	Consequence
No DG Packaging Certificate	Customs declaration	Declaration rejected; cargo cannot be released for export
DG Certificate information mismatch	Customs declaration	Referred to manual review; export delay; possible fine
No Class Society Certificate	Booking / port operations	Carrier rejects booking or port refuses cargo acceptance
Expired Class Society Certificate	Port operations / PSC	Loading refused; destination port PSC detention; additional costs
IBC plate marking ≠ certificate	Port operations	Port surveyor refuses loading; container must be re-packed

8. Export Compliance Checklist

Ginga Logistics recommends running through the following checklist for every IBC dangerous goods shipment before export:

8.1 Customs DG Certificate (Before Declaration)

• ☐ Confirm whether cargo is listed in China's Hazardous Chemicals Catalogue (2015 + amendments) — determine if DG Certificate is required
• ☐ Product name and UN number on DG Certificate match the customs declaration exactly
• ☐ IBC specifications (type, capacity) on certificate match the actual container in use
• ☐ DG Certificate is within its validity period on the date of declaration
• ☐ Shipment quantity does not exceed the certified quantity on the certificate
• ☐ SDS issuer entity matches the cargo entity (for lithium-containing products: use a combined SDS, not a battery-only SDS)

8.2 Maritime Class Society Certificate (Before Booking/Declaration)

• ☐ Obtain the CCS (or equivalent) Type Approval Certificate from the IBC manufacturer
• ☐ Verify certificate validity (5-year period); confirm not expired
• ☐ Confirm the certified IBC type code (e.g., 31H1/Y/1000/S/CN/CCS) is permitted for this cargo under IMDG Code Chapter 4.1
• ☐ Verify physical IBC plate markings (e.g., UN/31H1/Y/0324/S/CN/CCS) exactly match the certificate type code
• ☐ IBC type code entered correctly on the DGD (Dangerous Goods Declaration)
• ☐ Confirm with carrier's DG department that the IBC is accepted for the destination port and vessel

8.3 Supporting Documents

• ☐ SDS (Safety Data Sheet) — in English and destination country language
• ☐ Export license (if cargo is a dual-use chemical or controlled substance)
• ☐ CSC Certificate (Container Safety Convention plate / certificate of fitness)
• ☐ Container Packing Certificate (signed declaration that packing complies with IMDG Code requirements)

9. Summary and Recommendations

IBC containers are a high-volume packaging format in China's hazardous goods export trade. Their dual regulatory exposure — Customs and Maritime — means compliance requires managing two distinct certificate streams simultaneously. The key takeaways are:

Ginga Logistics maintains a dedicated hazardous goods compliance team with deep expertise in China's dual Customs and Maritime regulatory frameworks. We provide end-to-end support: DG Certificate application assistance, DGD preparation and review, carrier DG declaration coordination, port operations support, and destination port document compliance.