Pneumatic Buoyancy Lifting Rubber Ship Salvage air Bags Are Used for Shipwrecks,sunken Ships,sunken Barge

Pneumatic Buoyancy Lifting Rubber Ship Salvage air Bags Are Used for Shipwrecks,sunken Ships,sunken Barge

Pneumatic Buoyancy Lifting Rubber Ship Salvage Air Bags, also known as rubber ship salvage air bags, are essential heavy - duty pneumatic buoyancy equipment in marine salvage projects. They rely on inflated air to generate buoyancy for salvaging sunken ships, lifting underwater structures and other operations. Below is a detailed introduction to their core features, manufacturing process and typical applications:

Product Description:

Material Advantages:

1. Primary Rubber Material: Tough and damage-resistant, suitable for salvage operations
Formulated with a blend of natural rubber and styrene-butadiene rubber (total rubber content ≥72%), combining the high elasticity of natural rubber with the wear and aging resistance of styrene-butadiene rubber. Shore hardness controlled at 60-75HA, with a rebound rate exceeding 90% after compression deformation, enabling repeated endurance of stretching and compression during salvage operations.
High-proportion carbon black (reinforcing agent) and specialized tear-resistant additives enhance tensile strength ≥18MPa and tear strength ≥35kN/m. This construction resists punctures and abrasion from underwater reefs and gravel, preventing operational damage and air leaks.
2. Reinforcement Materials: High-Strength Support for Enhanced Load Capacity
1400D/2 or 1870D/2 nylon cord fabric serves as the reinforcement layer, with a breaking strength ≥2800N/5cm. This provides over 40% greater load capacity than standard synthetic cord fabric, effectively distributing radial tension when the bladder is inflated.
The fabric is impregnated with specialized rubber adhesive, achieving bond strength ≥3.5kN/m with the rubber layer. This eliminates interlayer delamination risks. Combined with cross-winding technology, it ensures uniform pressure distribution across the entire airbag. Maximum buoyancy per unit exceeds 100 tons, meeting large-scale shipwreck salvage requirements.
3. Sealing Layer Material: Ultimate Airtightness for Operational Safety
The built-in butyl rubber sealing layer offers 5-10 times the airtightness of standard rubber, effectively preventing gas permeation. It delivers excellent pressure retention after inflation, with a 24-hour leakage rate ≤2%, preventing buoyancy loss during salvage operations.
The sealing layer is integrally vulcanized with the main rubber body and skeleton layer, eliminating seams and preventing leakage risks at the source. Combined with leak-proof inflation valves, this further enhances operational safety.
4. Auxiliary Material Properties: Corrosion-Resistant and Durable for Marine Environments
Inflation valves and nozzles utilize hot-dip galvanized Q235 steel or 316L stainless steel, resisting seawater corrosion. Threaded connections feature nitrile rubber seals for stable sealing performance, preventing rust or failure during prolonged immersion.
The accompanying sling nets utilize high-strength polyester fiber with a breaking strength ≥15kN. Their surfaces are covered with wear-resistant rubber sleeves, ensuring secure attachment to the airbags while preventing friction damage to the airbag surfaces. This design is suitable for complex underwater operational environments.

Manufacturing Process:

Raw Material Preparation & Formula Mixing: The main rubber material is mixed with curing agents, accelerators and anti - aging agents. Then it is put into an internal mixer for mixing to form a rubber compound with good wear resistance and air tightness. The skeleton material selects nylon cord fabric for automobile tires, and the cord fabric is dipped in glue to enhance its bonding force with the rubber layer.
Calendering & Cutting: The mixed rubber is processed into uniform thin rubber sheets by a calender. The glued cord fabric is also calendered to form a "rubber - fabric - rubber" sandwich structure. After that, the rubber sheets and reinforced cord fabric are cut into corresponding sizes according to the designed specifications of the airbag.
Overall Winding Molding: The cut rubber sheets and reinforced layers are alternately wound around the mandrel layer by layer. The layers are cross - arranged at a certain slope, and mechanical rolling is carried out to ensure that there is no gap or bubble between the layers. The conical bag body and the cylindrical bag body are wound into a whole to wrap the nozzle, laying a foundation for the airbag's bearing capacity and air tightness.
Vulcanization & Fitting Installation: The wound airbag blank is put into a vulcanization chamber. It is heated and pressurized for vulcanization treatment to improve the rubber's elasticity, strength and aging resistance. After vulcanization and cooling, corrosion - resistant metal nozzles (such as hot - dipped galvanized Q235 material) and inflation valves are installed. These parts adopt threaded or snap - fit designs to ensure air tightness during inflation and deflation.
Strict Inspection & Finalization: The finished airbag is inflated for air tightness testing, such as observing whether there are air bubbles on the surface or detecting pressure changes with a pressure gauge. At the same time, dimensional inspection and puncture resistance tests are carried out. The products that meet the ISO 14409 standard and pass certifications such as CCS and BV can leave the factory after being qualified.

Features:

Technical Parameters:

Applications:

Shipwreck Salvage: Multiple airbags are evenly fixed on the sunken ship's hull. By inflating them synchronously, the buoyancy is gradually increased to lift the sunken ship from the seabed to the water surface, which is applicable to the salvage of various ships such as cargo ships and fishing boats in both shallow and deep waters.
Underwater Structure Lifting: In offshore engineering, it is used to lift submerged structures such as underwater pipelines, box culverts and caissons. It can provide adjustable buoyancy to assist in the installation and position adjustment of these structures, reducing the difficulty of underwater operation.
Auxiliary Ship Launching & Berthing: When the water depth at the dock is insufficient, the airbags can be placed under the ship to reduce the draft of the ship and assist the ship to launch smoothly. It can also be used to stabilize the ship during the launching process and avoid collision damage.
Emergency Marine Rescue: In emergency situations such as ship grounding and hull damage, the airbags can be quickly deployed to provide temporary buoyancy for the distressed ship, prevent it from sinking further, and win time for subsequent rescue operations.

Support and Services:

After-sales consultation: We provide 24/7 customer service to answer customer questions , such as specification selection, usage methods, and maintenance points.
Regular follow-up visits: The manufacturer may conduct regular follow-up visits to customers to understand the usage and collect customer feedback in order to continuously improve product quality and service levels.
Maintenance guidance: The manufacturer or professional organizations will provide customers with maintenance guidance, including regularly checking for deformation, rust, ; applying rust-preventive oil or corrosion inhibitors after cleaning; and lubricating .
 
 
with its excellent quality and attentive service, builds a solid guarantee for your maritime career. Choosing us means choosing safety, efficiency, and worry - free operation. Embark on a new journey of navigation, starting from choosing our product!
Any question please let us know ,our JinCheng maritime will provide you the best service with 7*24 hours ~