Pillow Underwater Lifting Bags are high-strength inflatable devices designed for heavy-duty underwater lifting, sunken vessel recovery, subsea equipment relocation, and controlled buoyancy operations in challenging marine environments. Constructed using multi-layer synthetic reinforcement fabrics encapsulated in marine-grade rubber, these airbags deliver exceptional tensile strength, hydrostatic pressure resistance, and abrasion durability.

Their pillow-shaped design ensures uniform load distribution, enabling safe lifting of irregular or partially damaged structures. Available in sizes ranging from 1 m × 2 m up to 4 m × 6 m, and capable of lifting loads from 5 tons to over 200 tons, these lifting bags are engineered for both deep-water salvage and offshore engineering applications.

A North Atlantic salvage company successfully recovered a 4,500-ton cargo vessel that had partially sunk at a depth of 20 meters following a severe storm. Using our Pillow Underwater Lifting Bags, the operation involved precise, gradual lifting to refloat the vessel without exacerbating structural damage.

Divers installed the airbags at critical hull points to ensure balanced lifting and stress distribution. The pillow design allowed the airbags to conform to hull contours and uneven seabed conditions, reducing torsional stress and ensuring structural integrity. The refloating operation was completed successfully within 18 hours, with the airbags subsequently redeployed for lifting and repositioning offshore platform modules.

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

• High Load Capacity for Deep Water Operations: Engineered for extreme lifting tasks with multi-layer synthetic reinforcement ensuring high tensile strength and hydrostatic pressure resistance
• Precision Buoyancy Control: Staged inflation allows gradual buoyancy increase for controlled lifting and positioning of submerged assets
• Reinforced Material Durability: Outer rubber layer resists seawater corrosion, microbial attack, UV exposure, and abrasion
• Flexible Deployment and Reusability: Designed for compact transport and rapid underwater deployment across multiple projects

• Sunken Vessel Recovery: Refloating grounded or sunken vessels in deep-water scenarios with controlled staged lifting
• Heavy Subsea Module Relocation: Supporting underwater repositioning of large equipment and offshore platform components
• Emergency Buoyancy Support: Providing rapid deployment for temporary flotation or stabilization of submerged assets

• Expertise in Deep Water Lifting Technology: Specialized inflatable lifting solutions with precise load calculations and operational guidance
• Advanced Multi Layer Manufacturing: Reinforced synthetic fabrics and marine-grade rubber with strict pressure testing and quality inspection
• Custom Design for Large Scale Projects: Tailored designs including airbag dimensions, reinforcement configurations, and staged inflation strategies
• Comprehensive Technical Support: Deployment guidance, maintenance recommendations, inspection protocols, and troubleshooting assistance

• What is the maximum lifting capacity of Pillow Underwater Lifting Bags?
  Capacity depends on size, volume, inflation pressure, and deployment configuration. Custom engineering ensures suitability for specific deep-water salvage operations.
• Can these airbags be reused for multiple heavy-duty operations?
  Yes. Proper cleaning, inspection, and storage maintain durability and performance across multiple deep-water lifting projects.
• Are they suitable for operations at depths beyond 20 meters?
  Yes. Reinforced multi-layer construction provides hydrostatic pressure resistance, making them suitable for deep-water lifting tasks.
• How are airbags installed under a sunken vessel?
  Divers or remotely operated vehicles place airbags at critical hull points. Proper positioning ensures balanced lifting and minimizes structural stress.
• Does Hongruntong Marine provide operational guidance for deep-water projects?
  Yes. We offer engineering consultation, buoyancy calculations, staged inflation guidance, and operational protocols for safe and efficient underwater lifting.