Overpack packaging for dangerous goods

Handling a lot of packaging can be impractical and dangerous, so they try to group all the packs in a single block. The block will be named Overpack, this is done to obtain a unit that is easy to handle and stow during transport.

We can say that the Overpack is a casing used to contain one or more packages, in such a way as to facilitate stowage and transport. If we imaged an Overpack, might come to mind some packs on a pallet, or simply, an Overpack could be a box that contains other packs. The dimensions of the Overpack varies depending on size of the packs.

Overpack packaging for dangerous goods

What are Dangerous Goods?

The international covention defines the Dangerous goods for transport, substances, mixture of substances or products that can cause even serius damage during handling and movement. Behind lots of common products, they hide dangerous goods: for examples perfumes, acetone or bleach, caustic soda, lithium batteries and others. All these must necessarily meet the requirements of the regulations for the transport of dangerous goods, to ensure safety during the way.

The dangerous goods cannot be shipped in generic packagings, the packaging have to be UN approved, and they can be in different materials, like: cardboard, wood, plastic ex.., identified by the sigle 4G, 4GV, 4DV. That packs are UN approved to contain specific packaging inside, which are also subjected to approval tests.

Packaging is not the only aspect to consider, all the provisions regarding the compilation of the documents necessary for transport (DDT ADR, Shipper's Declaration, Multimodal), the marking and labeling of packages must also be respected

Overpack Packaging

Overpacking is a crucial technique to ensure safety in the transportation of dangerous goods. It refers to an outer packaging designed to contain one or more inner packages, providing additional protection against impacts, leaks, or contamination. Creating an adequate overpack requires knowledge of international regulations, the use of specific materials, and proper arrangement of the packages inside.

Selection of Internal Packaging

Internal packaging must be approved and suitable for the contents it holds: Rigid containers for liquid substances, Sealed bags for solids or powders, absorbent secondary containers for materials that pose spill risks.Each internal package must be properly closed and sealed, using caps, lids, or safety seals.

Use of Cushioning Materials

Before placing internal packaging in the overpack, it's essential to use cushioning materials. These materials reduce the risk of damage caused by impacts or vibrations. Common examples include: Expanding foam or polystyrene,  Air cushions, Absorbent materials, like vermiculite, for liquid or reactive goods. The cushioning material must fill the empty spaces between the internal packages, ensuring stability and shock absorption.

Choice of Overpack

The overpack must be made from a durable material that complies with dangerous goods regulations. Placement of Internal Packages: Internal packages must be arranged in such a way as to avoid movement during transport. To do this: Place each internal package carefully, leaving enough space between them and the walls of the overpack, Fill all voids with cushioning materials to ensure stability, Use internal dividers, if necessary, to separate the packages and prevent direct contact.

Sealing the Overpack

Once the internal packages are arranged, seal the overpack securely using: Strong adhesive tape, Security straps, Approved seals, if required. Ensure that the overpack meets sealing requirements to avoid hazardous material leaks.

Marking and Labeling

A correct overpack must be clearly identifiable. Apply the required labels and markings, such as: Hazard symbols, like the UN pictogram for dangerous goods, UN numbers, identifying the type of substance being transported, Handling instructions, like “Handle with care” or “Keep away from heat.”

Final Check

Before shipment, ensure that the overpack meets all regulatory requirements and that the internal packages are adequately protected.

How to Protect Yourself?

Creating a safe overpack is not only about complying with regulations but also about protecting the safety of those transporting, handling, and receiving the goods. Attention to detail in selecting the packaging, cushioning materials, and proper labeling is essential to ensure safe transport. Relying on approved packaging suppliers and adequately training the involved personnel are fundamental steps for flawless management of the process.

Which Label to Use on Overpacks?

When transporting dangerous goods, mandatory markings must be applied to the packages. Therefore, if our packages are covered by an overpack, which would prevent the markings from being visible, we must label the overpack with the term "Overpack," the UN number preceded by the letters "UN," and orientation arrows. Additionally, it must display all the hazard class labels corresponding to the contents inside. There are many factors to consider to ensure that each shipment is safe and successful. When the overpack label is applied, the operator is declaring that the contents have been packed, labeled, and marked in compliance with regulations.

It is important that the goods inside are prepared according to the rules. This is why it’s crucial to rely on companies like ours, which can provide the necessary know-how, labeling materials, and markings to ensure everything runs smoothly.

Common Mistakes to Avoid When Labeling Dangerous Goods Packages

Labeling a package containing dangerous goods is a critical step to ensure safety and compliance with international regulations. A mistake in labeling can jeopardize safety during transport and lead to serious legal penalties. Here are the most common mistakes to avoid:

Omission of the UN Number and Classification Code

  • Lack of Hazard Labels
  • Incorrect Application of Labels
  • Confusion Between Overpack and Primary Packaging
  • Incorrect Completion of Regulatory Compliance Declaration
  • Forgetting to Apply Orientation Arrows
  • Not Checking the Visibility and Legibility of Markings
  • Failing to Consider Local and International Regulations

An incorrect or incomplete label not only compromises the safety of transporting dangerous goods but can also lead to legal penalties and material damages. To avoid these mistakes, it is essential to rigorously follow the applicable regulations, undergo proper training, and rely on industry experts.