Shipping containers are typically made from corten steel, a corrosion-resistant steel alloy that withstands exposure to the elements during transportation and storage. Here’s an overview of the manufacturing process:
- Steel Coil Preparation: The process begins with large steel coils, which are unrolled and flattened to the desired thickness. These coils are usually made from high-quality steel with specific properties to meet industry standards.
- Cutting and Forming: The flattened steel sheets are then cut into panels of precise dimensions using large hydraulic shears or laser cutting machines. These panels will form the sides, roof, and floor of the container. Some panels may also undergo additional forming processes to create corrugations for added strength and rigidity.
- Welding: The panels are welded together to form the basic structure of the container. Specialized welding techniques, such as MIG (Metal Inert Gas) or TIG (Tungsten Inert Gas) welding, are used to ensure strong and durable seams. Corner posts and door frames are welded into place to reinforce the structure.
- Floor Assembly: The container floor is constructed separately from the walls and roof. It typically consists of steel cross members with marine-grade plywood or bamboo flooring. The floor assembly is then welded to the bottom of the container frame.
- Surface Treatment: Once the container structure is assembled, it undergoes surface treatment to enhance durability and corrosion resistance. This may include sandblasting to remove rust and contaminants, followed by priming and painting with marine-grade coatings.
- Door Installation: Container doors, which are usually made from corten steel, are installed into the door frame openings. Heavy-duty locking mechanisms are added to secure the doors during transit and storage.
- Quality Control and Testing: Throughout the manufacturing process, rigorous quality control measures are implemented to ensure that the containers meet industry standards and specifications. This may involve visual inspections, dimensional checks, and non-destructive testing methods such as ultrasonic testing.
- Final Inspection and Certification: Once the container is fully assembled and tested, it undergoes a final inspection to verify compliance with relevant regulations and standards, such as those set by the International Organisation for Standardisation (ISO). Upon passing inspection, the container is certified for use in international shipping and transportation.
By following these steps, manufacturers produce shipping containers that are strong, durable, and suitable for the demanding conditions of global logistics and transportation.
