CSC Plate Information: What It Means and Why It Matters

What Is a CSC Plate?

CSC stands for the International Convention for Safe Containers. The agreement was adopted in 1972 by the United Nations and the International Maritime Organisation to create uniform safety rules for freight containers used in international transport. Containers approved under the convention carry a CSC safety approval plate fixed to the container doors.

The CSC plate confirms that the container has passed structural testing and meets minimum international standards for lifting, stacking, and transport. Most containers have the plate riveted to the left-hand cargo door.

A valid CSC plate is required for most international shipping movements. Without one, shipping lines may reject the container before loading.

If you need a container suitable for export use, Shipping Containers of London can supply units with valid CSC certification for shipping and freight operations.

Why CSC Plates Matter for International Shipping

A CSC plate acts as proof that a container is safe to move through ports, rail terminals, and container vessels. During international transport, containers are stacked several levels high and exposed to heavy loads, vibration, lifting forces, and changing weather conditions.

The plate confirms the container has been tested to handle these conditions safely.

For buyers and hirers, this matters for several reasons:

• Shipping lines often require a valid CSC plate before accepting bookings
• Ports and depots may refuse containers with expired inspections
• Export documentation must match the container identification details
• Insurance providers may reject claims involving non-compliant containers
• Unsafe containers create risks during lifting and stacking operations

A container used only for static storage on private land does not always require a valid CSC certificate. However, if the container may be exported later, recertification may be needed before shipment.

Shipping Containers of London supplies both storage containers and export-ready units, depending on the intended use.

What Information Appears on a CSC Plate?

CSC plates contain technical and compliance information linked to the container. According to BIC guidance, the plate must include key identification and safety data.

You will usually find:

• Container owner code and serial number - The unique container identification reference
• Date of manufacture - Month and year the container was built
• Maximum gross weight - The maximum permitted loaded weight
• Tare weight - The empty weight of the container
• Payload - The maximum cargo weight the container can carry
• Stacking test load value - The safe stacking load under transport conditions
• Racking test load - The sideways force resistance rating
• CSC approval number - The official certification reference
• Inspection programme details - Including ACEP or next examination dates

Payload refers to the maximum cargo weight the container can safely carry. Tare weight refers to the weight of an empty container before loading.

The container number shown on the CSC plate should match the markings painted on the exterior doors and the shipping paperwork.

CSC Plate Size and Design Requirements

The Convention for Safe Containers sets minimum design standards for the plate itself. The plate must remain legible throughout the container’s working life.

According to BIC guidance, CSC plates must:

• Be made from permanent, corrosion-resistant metal
• Measure at least 200mm x 100mm
• Use embossed, stamped, or permanently marked lettering
• Display “CSC SAFETY APPROVAL” in letters at least 8mm high
• Display all other text in letters at least 5mm high
• Use contrasting colours for readability

These requirements help inspectors read the plate clearly even after years of outdoor exposure and heavy handling.

ACEP and Periodic CSC Inspections

Containers used for international shipping must remain structurally safe after manufacture. This is managed through inspection programmes.

There are two main systems:

Periodic Examination Scheme (PES)

Under PES rules, the first inspection normally takes place within five years of manufacture. After that, inspections must happen at intervals of less than 30 months.

Approved Continuous Examination Programme (ACEP)

ACEP is widely used by container operators and leasing fleets. Instead of fixed inspection dates, containers are inspected continuously during repairs, depot handling, and operational checks. Containers operating under ACEP display the ACEP reference number on the CSC plate.

If a container suffers serious structural damage, the CSC approval may become invalid until repairs and reinspection are completed.

How to Check Whether a CSC Plate Is Valid

Before buying or hiring a container, inspect the CSC plate carefully. This is particularly important for export shipments.

Check the following:

• The plate is fixed securely to the container door
• The information is clear and readable
• The container number matches all paperwork
• The CSC approval has not expired
• The ACEP reference or next examination date is valid
• There are no signs of tampering or replacement

You should also inspect the container itself. A valid plate alone does not guarantee acceptance for shipping if the container has major structural damage.

Common problems that may fail inspection include:

• Damaged corner castings
• Severe corrosion
• Twisted frames
• Holes in side panels or roof sections
• Door sealing failures
• Unsafe flooring

Shipping Containers of London can advise whether a container is suitable for storage only or ready for export use.

What Happens If a Container Has No CSC Plate?

A missing, damaged, or expired CSC plate can create delays and extra costs during transport.

Shipping lines and ports may:

• Reject the booking
• Refuse loading
• Request additional inspections
• Require recertification before shipment
• Apply storage and handling charges during delays

If the container still meets structural standards, an authorised inspection body may recertify it and issue updated approval details.

For many buyers, it is more cost-effective to purchase a container that already holds a valid CSC certification rather than arranging repairs and reinspection later.

Buying an Export-Ready Container

If you plan to use a container for international freight, ask these questions before buying:

1. Does the container have a valid CSC plate?
2. Is it operating under ACEP or PES inspection rules?
3. Is the container wind and watertight?
4. Has the container recently been inspected?
5. Will the supplier provide matching identification paperwork?

Wind and watertight means the container keeps out normal rain and weather during use. Most used storage containers are sold as wind and watertight, but not all are suitable for export shipping.

One-trip containers are often the simplest option for export use because they are newer units with minimal wear and long remaining CSC validity.

You can also compare standard container sizes before ordering:

• 20ft container dimensions
• 40ft container dimensions
• Shipping container types
• Container delivery guidelines