Safety – Professionalism – Efficiency
Big Sea Company has successfully replaced a damaged steel plate at the bow section of a cargo vessel anchored in Vietnam. This was a critical repair work, carried out to ensure the structural integrity of the hull and the vessel’s stable operation during long sea voyages.
According to a Big Sea representative, the hull breach at the bow, if not addressed in time, could directly affect the vessel’s ability to withstand rough seas and reduce overall maritime safety. Therefore, immediately after receiving the request, the technical team promptly conducted inspection, measurement, and proposed the most effective replacement solution.
The entire repair process was executed in strict compliance with international safety standards: from cutting out the damaged plate, fabricating a new steel plate matching the ship’s size and structure, to welding, conducting watertightness testing, and applying anti-corrosion surface treatment. All procedures were carried out by highly skilled shipyard workers, using modern specialized equipment.
1. Survey & measure damaged area and prepare & transport equipment and materials onto ship
As soon as the vessel docked, Big Sea’s engineers conducted a thorough inspection of the bow section where the hull was damaged. Every crack and sign of corrosion was carefully noted and measured. This precise survey allowed the team to define the scope of the damage and determine the safest and most cost-effective repair plan.
After the initial assessment, specialized machinery such as cutting tools, welding machines, lifting devices, and protective gear were fully prepared. Certified steel plates were also transported onboard. Every step followed strict safety protocols to ensure smooth and secure operations.
2. Cutting steel broken
Skilled workers used advanced cutting equipment to completely remove the damaged plate. A new steel plate was then fabricated on-site, cut precisely to match the dimensions and contours of the affected area. This step required a high degree of accuracy to ensure a perfect fit with the vessel’s hull structure.
3. Edges of the new plate
To strengthen the welding joints, the edges of the new plate were beveled and smoothed. Though it may seem like a minor task, this process is crucial for weld quality, ensuring the new plate bonds firmly with the hull and withstands the harsh pressure of open seas.
4. Welding new plate
Once positioned correctly, the new steel plate was secured and welded into place. Welders executed thick, consistent weld lines in multiple layers to ensure complete watertightness. Every action was closely supervised by responsible engineers to comply with international maritime safety standards.
5.NDT by conum
After welding was completed, the vessel underwent NDT testing to confirm watertightness. Once the results met the standards, the repaired area was coated with multiple layers of anti-corrosion paint, protecting the hull from the harsh effects of seawater and weather conditions.
6. Completion & handover
Finally, the worksite was cleaned, and all equipment was removed in an orderly manner. The supervising engineer performed a final inspection before handing the vessel back to the owner. The ship was now ready to resume its journey with a reinforced structure and absolute safety.
After welding was completed, the vessel underwent leak testing to confirm watertightness. Once the results met the standards, the repaired area was coated with multiple layers of anti-corrosion paint, protecting the hull from the harsh effects of seawater and weather conditions.
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