Reinforced Nylon Fabric Marine Buoyancy Bags with 200kg to 50 Tons Lifting Capacity and PVC Coating
Hongruntong Marine Buoyancy Bags are professional underwater lifting systems engineered for offshore recovery operations, submerged vessel stabilization, underwater construction support, and marine emergency response applications requiring reliable buoyancy performance under demanding operational conditions.
The product is manufactured using reinforced industrial composite fabric integrated with high-strength internal load-bearing structures, providing stable lifting capability and long-term structural durability during repeated subsea deployment.
A large offshore ship repair facility in East Asia experienced an emergency operational incident involving a partially flooded maintenance barge positioned inside a restricted dry dock transition zone during severe weather conditions.
Hongruntong Marine Buoyancy Bags were deployed as part of the emergency stabilization procedure. Multiple buoyancy units were installed along the affected section of the partially submerged vessel while commercial divers coordinated underwater attachment operations under restricted visibility conditions.
The buoyancy-assisted stabilization process enabled the engineering team to maintain controlled vessel positioning while emergency dewatering systems and temporary structural reinforcement procedures were performed simultaneously.
| Product Name | Buoyancy Bags |
| Raw Material | PVC coating fabric |
| Type | Cylindrical |
| Size | 500kg, 1000kg, 5000kg, 10000kg, etc |
| Thickness | 0.4-1.2mm, or as request |
| Color | Yellow, Blue, Black, etc |
| Density | 0.33-0.9g/cm³ |
| Safety Factor | 7:1 |
| Tolerances | +/- 0.03 on densities +/- 0.2 mm on thickness +/- 0 to +3mm on width +/- 0 to +3mm on length |
| Model | Buoyancy [kg] | Buoyancy [lbs] | Diameter [mm] | Length [mm] | Appr. Weight [kg] |
|---|---|---|---|---|---|
| HM-ULB01 | 200 | 441 | 500 | 1,000 | 5 |
| HM-ULB02 | 500 | 1,103 | 800 | 1,000 | 8 |
| HM-ULB03 | 1,000 | 2,205 | 1,000 | 1,500 | 11 |
| HM-ULB04 | 2,000 | 4,410 | 1,300 | 1,500 | 20 |
| HM-ULB05 | 4,000 | 8,820 | 1,600 | 2,000 | 50 |
| HM-ULB06 | 6,000 | 13,230 | 2,000 | 2,000 | 66 |
| HM-ULB07 | 8,000 | 17,640 | 2,000 | 2,600 | 75 |
| HM-ULB08 | 10,000 | 22,050 | 2,400 | 2,400 | 80 |
| HM-ULB09 | 15,000 | 33,075 | 2,600 | 3,000 | 110 |
| HM-ULB10 | 20,000 | 44,100 | 3,000 | 3,000 | 130 |
| HM-ULB11 | 30,000 | 66,150 | 3,000 | 4,500 | 170 |
| HM-ULB12 | 50,000 | 110,250 | 4,000 | 4,000 | 220 |
| HM-ULB13 | 70,000 | 154,350 | 4,000 | 5,700 | 310 |
| HM-ULB14 | 100,000 | 220,500 | 4,000 | 8,000 | 450 |
| HM-ULB15 | 150,000 | 330,750 | 5,000 | 8,000 | 660 |
| HM-ULB16 | 200,000 | 441,000 | 5,000 | 10,000 | 900 |
Note: Other sizes can be customized according to the requirements.
- Rapid Emergency Deployment Performance: Engineered for emergency marine operations requiring fast transportation, efficient underwater installation, and rapid lifting system activation.
- High-Efficiency Pressure Retention System: Reinforced inflation valves and precision pressure-sealing structures maintain stable internal air pressure during prolonged subsea deployment.
- Adaptability for Complex Marine Conditions: Maintains operational stability under diverse marine conditions including unstable seabed, restricted access, and variable tidal movement.
- Extended Service Life Under Industrial Use: Reinforced synthetic industrial fabric with marine-grade protective coating systems for long-term operational durability.
- Vessel Stabilization and Marine Recovery: Emergency vessel stabilization, submerged ship recovery, floating assistance operations, and underwater repositioning procedures.
- Offshore Oil and Gas Infrastructure Maintenance: Subsea equipment handling, underwater structural repair, offshore platform maintenance, and marine operational support.
- Underwater Construction and Structural Positioning: Submerged assembly operations, underwater module alignment, infrastructure installation, and controlled lifting procedures.
- Efficient Marine Equipment Manufacturing System: Specialized production capability with controlled fabrication procedures and industrial quality management systems.
- Operational Reliability Under Severe Offshore Conditions: Engineered for dependable performance within offshore environments involving fluctuating pressure and strong currents.
- Comprehensive Marine Industry Engineering Experience: Extensive experience supporting offshore construction contractors, shipyards, and marine salvage operators.
- Responsive International Technical Support Capability: Coordinated manufacturing scheduling, export logistics support, and technical consultation for global marine customers.
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