Inflatable Lift Bags UV Resistant Eco Friendly Material Saltwater Resistant Long Term Durability

Buoyancy Bags are advanced inflatable lifting devices engineered to provide precise, reliable, and controlled underwater lifting solutions. They are designed for a broad range of subsea operations, including salvage, recovery, construction, and offshore maintenance.

Manufactured using high-strength synthetic fabrics coated with elastomeric polymers, these bags deliver exceptional performance in terms of tensile strength, puncture resistance, and long-term air retention.

Each unit features reinforced lifting points, automatic pressure relief valves, and corrosion-resistant fittings to ensure maximum safety and operational reliability. The open-bottom design allows for self-regulating air release during ascent, preventing sudden pressure buildup and ensuring a smooth, controlled lift.

In 2024, a major renewable energy contractor required a solution for lifting and repositioning a subsea transition piece that had settled unevenly during offshore wind turbine installation. The structure weighed approximately 12 tons and was located 22 meters underwater in a strong current area.

Hongruntong Marine supplied Buoyancy Bags designed specifically for controlled vertical lift and precise orientation control. Eight lifting units with 1.5-ton capacity each were attached evenly along the structure's perimeter using high-strength slings and certified shackles.

The project was completed 30% faster than the initial schedule, with zero incidents or structural damage. Following the success of this project, the contractor standardized Hongruntong Marine's Buoyancy Bags for all subsequent offshore maintenance campaigns.

• Controlled Lift with Self Regulating Air Release: Buoyancy Bags utilize a precision-engineered open-bottom venting system that allows excess air to discharge automatically during ascent.
• High Strength Fabric and Reinforced Seams: Each bag is constructed from multi-layer nylon or polyester fabric coated with neoprene or polyurethane.
• Corrosion Resistant and Diver Friendly Components: All metal fittings, valves, and shackles are manufactured from marine-grade stainless steel or brass.
• Compact, Lightweight, and Portable Design: When deflated, Buoyancy Bags fold into a compact shape for convenient storage and transport.
• Precision Monitoring and Control: Optional features include pressure gauges, relief valves, and inflation manifolds for synchronized multi-bag operation.
• Long Service Life and Reusability: Engineered for repeated deployment cycles, the bags retain air-tight performance through hundreds of uses.

• Marine Salvage and Recovery Operations: Buoyancy Bags are extensively used in ship, boat, and barge recovery where stability and controlled ascent are critical.
• Pipeline and Cable Installation: The bags offer stable lift and precise maneuverability during pipeline laying, repositioning, or maintenance.
• Offshore Construction and Maintenance: Ideal for handling subsea frames, foundations, and components during installation or inspection.
• Equipment Deployment and Retrieval: Buoyancy Bags are frequently used for deploying underwater sensors, instruments, and structures.
• Emergency Response and Rescue: Rapid-deploy Buoyancy Bags can lift sunken vehicles, cargo containers, or submerged infrastructure in accident recovery scenarios.

• Proven Design and Engineering Expertise: Hongruntong Marine combines advanced engineering with field-tested experience.
• Premium Materials and Precision Manufacturing: Every Buoyancy Bag is produced in ISO-certified facilities using marine-grade rubberized fabrics.
• Tailored Solutions for Specialized Operations: Hongruntong Marine provides custom Buoyancy Bags in various capacities.
• Global Support and After Sales Service: With a network of service partners and technical consultants.
• Commitment to Safety and Innovation: Safety is integrated into every design stage.
• Trusted by Industry Leaders: Hongruntong Marine is a preferred supplier for international offshore, salvage, and construction contractors.