Pillow Underwater Lifting Bags are high-performance inflatable marine devices designed for underwater lifting, vessel refloating, subsea equipment repositioning, and buoyancy-assisted operations in complex marine environments. Engineered using multi-layer synthetic fabric reinforcement encapsulated in marine-grade rubber, these airbags provide superior tensile strength, controlled elasticity, and exceptional durability against seawater, abrasion, and hydrostatic pressure.

Available in custom sizes ranging from 0.5 m × 1 m up to 3 m × 5 m, Pillow Underwater Lifting Bags can support load capacities from 1 ton to over 100 tons, depending on configuration, inflation pressure, and deployment arrangement. Their pillow-shaped design ensures uniform stress distribution, preventing localized deformation and providing stable buoyancy even in uneven or rugged seabed conditions.

The airbags are suitable for both small-scale salvage and heavy subsea engineering applications. Their flexible design allows precise buoyancy control, enabling operators to lift, stabilize, or reposition submerged vessels and equipment with minimal structural stress. Compared with rigid pontoons or crane-based lifting, Pillow Underwater Lifting Bags reduce mobilization costs, accelerate operations, and provide reusable, adaptable solutions for shipyards, salvage operators, and offshore contractors.

A Southeast Asian salvage contractor was tasked with recovering a 350-ton fishing vessel that had partially sunk in shallow coastal waters following a severe storm. The vessel was lying on a muddy seabed with uneven support points, making conventional crane recovery impractical. The client required a solution capable of providing gradual, controlled lift while minimizing stress on the hull and ensuring diver safety.

Hongruntong Marine supplied a set of Pillow Underwater Lifting Bags designed for high-precision lifting. Each airbag was strategically positioned beneath the hull at key structural points to evenly distribute the lifting load. Prior to deployment, detailed buoyancy calculations and staged inflation procedures were provided to the operator, ensuring smooth refloating without sudden shifts or tilting.

During the operation, airbags were inflated incrementally to gradually lift the vessel from the seabed. The pillow shape allowed even stress distribution along the hull, adapting to the irregular underwater terrain. The operation was completed safely within 12 hours, and the same airbags were subsequently reused for additional vessel refloating tasks in nearby waters. The client reported enhanced safety, reduced operational cost, and high repeatability, confirming the effectiveness of Pillow Underwater Lifting Bags in salvage operations.

Note: Other sizes can be customized according to the requirements.

• Controlled Buoyancy for Precision Lifting: Pillow Underwater Lifting Bags allow operators to finely adjust buoyancy through staged inflation, ensuring stable and predictable lift of submerged vessels or equipment. This control minimizes structural stress and reduces the risk of tilting or sudden movements.
• Multi Layer Reinforced Structure: The airbags consist of high-tensile synthetic fabric layers bonded with marine-grade rubber. This multi-layer construction provides resistance to hydrostatic pressure, repeated inflation cycles, and mechanical abrasion.
• Marine Grade Material Durability: Outer rubber layers are designed to resist corrosion, UV exposure, and microbial attack. High puncture and tear resistance protect the airbags from rough surfaces and marine debris.
• Flexible Deployment and Reusability: These airbags can be transported compactly, deployed quickly by divers, and inflated underwater for precise buoyancy control. Their adaptability allows multiple reuses across various projects.

• Vessel Recovery and Salvage Operations: Pillow Underwater Lifting Bags are ideal for refloating grounded, partially submerged, or sunken vessels. Staged inflation allows gradual lift, reducing structural stress while ensuring diver safety.
• Subsea Equipment Relocation: These airbags support the controlled movement of heavy subsea modules, anchors, or offshore structures. Adjustable buoyancy allows precise placement and stabilization during installation tasks.
• Offshore and Emergency Operations: Pillow Underwater Lifting Bags can provide rapid deployment for emergency flotation, temporary stabilization, or subsea asset repositioning in offshore environments.

• Expertise in Subsea Lifting Technology: Specializing in underwater lifting solutions, providing engineering design, load calculations, and operational guidance for marine salvage and offshore projects.
• Advanced Manufacturing and Material Quality: Each airbag is produced using reinforced multi-layer fabrics and marine-grade rubber with rigorous pressure testing and quality control.
• Custom Engineering for Complex Applications: Tailored designs including optimized dimensions, reinforcement configurations, and staged inflation strategies for maximum safety and efficiency.
• Comprehensive Technical Support: Services extend beyond manufacturing to include deployment guidance, maintenance advice, inspection protocols, and troubleshooting support.