Certification and Testing Process of a New Container Before Commissioning

3. 8. 2025

What is the certification and testing process of a new container?

The certification and testing process of a new shipping container before commissioning is a systematic set of internationally recognized procedures whose aim is to verify that every newly manufactured container meets strict safety, structural integrity, dimensional accuracy, strength and long‑term durability requirements. This process is essential for crew safety, protection of the cargo and smooth operation of the global logistics chain.

The process is not a one‑time inspection; it includes:

Approval of the design and production documentation,
Audit of the manufacturing plant and qualification of personnel, especially welders and inspectors,
Production and testing of a prototype according to standards (particularly the ISO 1496 series),
Regular monitoring of serial production, and
Finally marking and issuance of internationally recognized certificates (e.g., CSC plate).

Without successful certification a container cannot be legally placed in international transport – its movement would be restricted, fines and cargo detentions could occur.

Why is container certification crucial?

Importance	Detailed Explanation
Operational safety	Certification protects the lives of crew, workers and the surrounding environment: containers are exposed to extreme forces (stacking, sea wave action, crane handling) – a structural failure can mean disaster.
Interoperability	Thanks to ISO standards containers have standardized dimensions and corner fittings, which enables seamless transport and handling on ships, trains and trucks worldwide.
Legal compliance	The International Convention for Safe Containers (CSC) is legally binding; a non‑certified container must not be used in international transport.
Cargo protection	A certified container ensures resistance to weather, prevents water ingress, and protects against theft and physical damage.
Insurance	Insurers require a valid certificate; otherwise a claim may be denied.
Supply‑chain confidence	Certification signals quality to all participants in the chain – from manufacturer through carrier to the consignee.

Main phases of the certification process

Certification of shipping containers is carried out under the supervision of authorized inspection/verification societies (e.g., Bureau Veritas, DNV, ABS, Lloyd’s Register) and includes the following steps:

1. Design Assessment

What is evaluated:

Technical drawings – detailed views of the frame, walls, floor, roof, corner fittings.
Material data sheets – steel specifications, floor panels (often hard wood with certification), seals, corner fittings (corner castings per ISO 1161).
Strength calculations – load simulations for stacking, lifting, transport.
Joint inspection – details of welded, bolted and riveted joints.
Quality‑control plan – definition of inspection points during production.

Additional requirements:

All materials and semi‑finished products must have a mill certificate (certificate of origin and quality).
Welders must be certified according to the relevant standards (e.g., EN ISO 9606‑1).
Welding methods must be approved and weld tests performed.

2. Factory Approval

Audit includes:

Quality Management System (QMS) – ideally ISO 9001 compliant.
Personnel qualification – verification of key technicians, especially welders.
Equipment calibration – all measuring and testing devices must be regularly calibrated.
Material traceability – every component must be identifiable back to its source.

Result:

After a successful audit a Factory Approval Certificate is issued, typically valid for 5 years with annual surveillance.

3. Prototype Testing

The most critical part of certification!
The prototype must undergo a series of tests according to ISO 1496‑1 to 5 and CSC requirements:

Test Name	Purpose	Procedure and Parameters
Lifting from upper corners	Simulate crane handling	Container is loaded to twice the maximum permissible weight and lifted by the upper corner fittings. No permanent deformation may occur.
Lifting from lower corners	Simulate spreader handling	Same as above but using the lower corner fittings.
Stacking	Stacking resistance	Container is subjected to a force equivalent to stacking several containers (typically up to 192 000 kg). Frame and columns must not crack or deform.
Concentrated roof and floor load	Roof/floor strength	Roof: minimum 300 kg applied to an area of 600 × 300 mm; Floor: 5 460 kg applied to 185 × 100 mm (simulating a forklift wheel).
Wall strength	Front/side wall resistance	Pressure equivalent to cargo movement (e.g., 0.6 × maximum gross load on the wall).
Transverse and longitudinal torsion	Torsional resistance	Simulate forces occurring during ship rolling or train braking.
Watertightness	Water protection	Container is sprayed with a strong water jet (minimum 100 l/min for 5 minutes on each seam); no water ingress is allowed.

Additional checks:

Non‑destructive weld testing – X‑ray, ultrasonic, capillary tests.
Dimensional verification – compliance with ISO 668 tolerances.

4. Production Inspection

Inspectors from the verification company perform random inspections of each production batch.
They check especially weld quality, correct installation of corner fittings, sealing, dimensional accuracy and markings.
Every container undergoes a visual inspection and documentation check before leaving the factory.
Failure to follow approved manufacturing procedures can lead to withdrawal of the Factory Approval.

5. Issuance of Certificates and Marking (CSC, CIC)

After a successful inspection each container receives a CSC Safety Approval Plate, which includes:
- Text “CSC SAFETY APPROVAL”
- Country and approval number
- Manufacture date
- Container identification number (ISO 6346)
- Maximum Gross Weight (MGW)
- Allowed stacking weight
- Torsional load values
- Date of next inspection (NED) or ACEP program number
For refurbished containers (e.g., sold as “CIC”) a Container Inspection Certificate (CIC) is issued, confirming suitability for transport.

Key Standards and Regulatory Bodies

Acronym	Standard / Convention	Significance
CSC	International Convention for Safe Containers	Sets minimum safety standards for construction, testing, inspection and maintenance of containers. Mandatory for all IMO signatories.
ISO 668	Series 1 Freight Containers – Classification, dimensions, ratings	Defines standardized dimensions and load capacities of common containers (20′, 40′, 45′, etc.).
ISO 1161	Series 1 Freight Containers – Corner fittings	Specifies dimensions and strength of corner fittings.
ISO 1496‑1 to 5	Series 1 Freight Containers – Specification and testing	Establishes construction, testing and approval requirements for various container types (general, insulated, tank, etc.).
ISO 6346	Coding, identification and marking	System for container identification (BIC codes, type codes).
IMDG Code	International Maritime Dangerous Goods Code	Requirements for transport of hazardous goods.

Post‑Commissioning Inspection Programs

Periodic Inspections (PES – Periodic Examination Scheme)

First inspection within 5 years of manufacture, subsequent inspections at intervals not exceeding 30 months.
Checks include frame, walls, doors, floor, seals, lock functionality, corrosion and deformation.
The next inspection date is marked on the CSC plate.

ACEP (Approved Continuous Examination Program)

For large fleets (shipping lines, leasing companies).
Containers are continuously monitored as part of routine maintenance (each depot intervention, major repair).
The CSC plate shows the ACEP program number instead of a specific inspection date.

7‑Point Container Check

Undercarriage – beams, cross‑members: corrosion, cracks.
Doors – locks, hinges, seals.
Right/left side – walls, beams: holes, deformation, corrosion.
Front wall – condition, ventilation openings.
Floor – damage, holes, flatness.
Roof – cracks, deformation, leaks.
CSC plate – readability, inspection validity.

Specialized Container Types

Type	Certification Specifics
Offshore containers	For oil platforms; must meet DNV 2.7‑1 (reinforced structure, special lifting eyes, higher corrosion resistance), more frequent inspections and documentation of lifting eyes.
Tank containers	According to ISO 1496‑3; must pass pressure tests, leak tests and undergo regular re‑certification.
Containers for dangerous goods	Must comply with IMDG Code, ADR, RID; often require special markings, spill containment, ventilation.
Thermally insulated / refrigerated (reefer)	Per ISO 1496‑2; testing of insulation, cooling unit performance and watertightness.

Conclusion

The certification and testing process for a new container is extremely rigorous, multi‑stage and internationally harmonized. Its purpose is to guarantee that every container is:

Structurally safe,
Resistant to extreme conditions,
Fully compatible with all elements of global logistics.

Neglecting any phase can endanger lives, property and the smooth flow of trade. Therefore, compliance with all certification and inspection requirements is the foundational pillar of modern container transport.

Czech Republic, Hodonín

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