Marine steel doors are a large category of doors specially used for ships, or with wind, rain, sealing and other functions. It is made of steel material with high strength and corrosion resistance and can be used in harsh Marine environments. This type of door is manufactured according to the CB751-68 standard, and different specifications of steel doors have different densities, and their resistance to external factors such as seawater, wind and rain, and wind and sand entering the interior of the cabin is also different. This kind of steel door is mostly suitable for work cabin and inland ships.