Watertight Door for Boats and Ships GJB2805B-2021

The marine-type waterproof airtight door is a specialized door primarily used in vessels, offshore platforms, storage facilities, and other locations to prevent the ingress of humid air, water, fire, toxic gases, etc., while also offering certain anti-theft functions. Below are its relevant features and specifications:

Material and Structure

• Door Body Material: Typically made of stainless steel, aluminum alloy, or steel materials, offering excellent corrosion resistance and high strength to withstand humid environments and marine climate erosion.

• Door Frame Structure: The door frame is constructed from steel plates or profiles, such as Q235A 8mm-10mm steel plates. The door panel may adopt a composite structure, such as 3mm steel plate + insulation layer + 3mm steel plate, with surface anti-corrosion treatments like epoxy zinc-rich paint to enhance corrosion resistance.

• Sealing Design: The door leaf is embedded with sealing strips, such as EPDM rubber seals, and equipped with 304 stainless steel联动压紧机构 (linkage compression mechanism) to ensure sealing performance between the door leaf and frame, making the door light-proof, airtight, and watertight when closed.

Sealing Performance

• Sealing Strips: High-quality sealing strips, such as EPDM rubber seals, are used, offering good elasticity and weather resistance to maintain effective sealing over extended periods, effectively blocking external moisture, air, and pollutants from entering the interior.

• Compression Mechanism: Equipped with a linkage compression mechanism, such as eccentric handles or gear linkage locking mechanisms, which achieve tight contact between the door leaf and frame through mechanical transmission, enhancing sealing performance while making door operation more convenient and efficient.

Lock Configuration

• Lock Types: Options include mechanical combination locks, electronic combination locks, facial recognition, iris scanning, and other intelligent unlocking methods, meeting first-class anti-theft standards and catering to the security needs of various locations.

• Lock Requirements: Major components of the lock should be made of corrosion-resistant metal materials, such as brass, bronze, stainless steel, or other metals with anti-corrosion coatings. Mechanical components should have a working life of over 60,000 cycles, key torque not less than 3 Nm, lock key capacity not less than 60,000, pin tumbler lock pin step difference not less than 0.5mm, and lock interchangeability rate not exceeding 0.03%.

Explosion and Pressure Resistance

The door body structure and manufacturing process are specially designed and produced, offering high strength and strong deformation resistance. The designed explosion and pressure resistance typically range between 0.6-1.0 MPa, effectively withstanding external impacts such as explosion shock waves to ensure the safety of the internal space.

Manufacturing Process

• Welding Process: The entire production process employs advanced one-time mold pressing and welding成型 (forming), resulting in small welds and high welding strength. For customers with special requirements, new processes can be adopted, such as整板压模成型后折弯 (whole plate mold pressing and then bending), achieving a door leaf surface without welds, an overall door leaf without焊缝 (welds), an aesthetically pleasing appearance, high strength, and excellent sealing performance.

• Surface Treatment: In addition to常规处理 (conventional treatments) like anti-corrosion paint spraying, special surface treatment processes are used for high-demand locations, such as brushing treatment on stainless steel surfaces to improve the door's appearance quality and corrosion resistance.

Application Scope

Widely used in shipbuilding, offshore oil platforms, cold chain logistics, power facilities, storage, and other fields. For example, in shipbuilding, they are used for cabin doors on various vessels and merchant ships; in cold chain logistics, for moisture-proof sealing in cold storage and containers; in power facilities, for equipment protection in power stations and substations, etc.