Marine Grade PVC Underwater Air Lift Bags with Anti Abrasion and Stable Load Support for Salvage Operations
The cylindrical Underwater Air Lift Bag is a robust and versatile buoyancy device specifically engineered for high-frequency marine operations in demanding environments such as ports, river engineering sites, and dredging projects. Constructed from high-strength polyester fabric with multi-layer wear-resistant coating, the bag delivers exceptional durability against abrasion, puncture, and mechanical impact.
Its cylindrical configuration ensures stable lifting performance and consistent buoyancy distribution, even under uneven loading conditions. The bag is equipped with reinforced lifting belts, heavy-duty shackles, and industrial-grade inflation valves, allowing for safe and efficient handling during repeated deployment cycles.
Available in a wide range of capacities from 3 tons to over 250 tons, the product is ideal for continuous-use applications where reliability and operational efficiency are critical. It is particularly suited for projects requiring rapid deployment, repetitive lifting, and minimal downtime.
In a major port expansion project in South America, contractors needed to frequently lift and reposition submerged dredging pipelines and heavy sediment equipment in shallow and debris-filled waters. The operating environment included high turbidity, uneven seabed conditions, and continuous daily usage requirements.
Hongruntong cylindrical underwater air lift bags were selected due to their superior abrasion resistance and reliability under repetitive operations. The bags were used to lift and stabilize pipeline sections during dredging and relocation processes.
Over a three-month period, the air lift bags were deployed in over 120 lifting cycles without significant wear or performance degradation. The operation efficiency increased by approximately 40%, as the need for heavy lifting cranes was minimized. The client reported reduced maintenance costs and highlighted the product's durability as a key advantage for long-term projects.
| Product Name | Underwater Air Lift Bags |
|---|---|
| Raw Material | Superior PVC Coating Fabric |
| Type | Cylindrical |
| Size | 500kg, 1000kg, 5000kg, 10000kg, etc |
| Thickness | 0.4mm-2.5mm, or as request |
| Color | Yellow, Blue, Black, etc |
| Density | 0.33-0.9g/cm³ |
| Safety Factor | 7:1 |
| Accessories | Valve, Inflatable Tube, Repair Material |
| OEM | Welcome |
| Warranty | 3 Years |
| 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-C01 | 200 | 441 | 500 | 1,000 | 5 |
| HM-C02 | 500 | 1,103 | 800 | 1,000 | 8 |
| HM-C03 | 1,000 | 2,205 | 1,000 | 1,500 | 11 |
| HM-C04 | 2,000 | 4,410 | 1,300 | 1,500 | 20 |
| HM-C05 | 4,000 | 8,820 | 1,600 | 2,000 | 50 |
| HM-C06 | 6,000 | 13,230 | 2,000 | 2,000 | 66 |
| HM-C07 | 8,000 | 17,640 | 2,000 | 2,600 | 75 |
| HM-C08 | 10,000 | 22,050 | 2,400 | 2,400 | 80 |
| HM-C09 | 15,000 | 33,075 | 2,600 | 3,000 | 110 |
| HM-C10 | 20,000 | 44,100 | 3,000 | 3,000 | 130 |
| HM-C11 | 30,000 | 66,150 | 3,000 | 4,500 | 170 |
| HM-C12 | 50,000 | 110,250 | 4,000 | 4,000 | 220 |
| HM-C13 | 70,000 | 154,350 | 4,000 | 5,700 | 310 |
| HM-C14 | 100,000 | 220,500 | 4,000 | 8,000 | 450 |
| HM-C15 | 150,000 | 330,750 | 5,000 | 8,000 | 660 |
| HM-C16 | 200,000 | 441,000 | 5,000 | 10,000 | 900 |
- Exceptional Abrasion Resistance for Harsh Environments
The outer layer is engineered with reinforced polymer coating designed to withstand continuous friction from sand, rocks, and debris commonly found in dredging and port environments. - High Durability for Repeated Use Cycles
Specifically designed for high-frequency deployment with multi-layer fabric construction and reinforced seams that maintain structural integrity even after hundreds of inflation and deflation cycles. - Stable Lifting Performance under Variable Loads
Cylindrical shape maintains stability even when handling uneven or shifting loads, with internal pressure distribution ensuring consistent buoyancy. - User-Friendly Operation and Rapid Deployment
Lightweight construction with quick-connect air valves and simple rigging systems enable fast setup and operation, reducing labor requirements.
- Port Maintenance and Dredging Support
Used for lifting pipelines, sediment equipment, and underwater structures during dredging operations, improving efficiency and reducing equipment dependency. - River Engineering and Inland Waterway Projects
Supports construction and maintenance tasks such as bridge foundation work, pipeline placement, and debris removal in shallow or confined waters. - Pipeline Handling and Repositioning
Facilitates lifting, alignment, and relocation of pipelines in both offshore and inland environments with controlled buoyancy.
- Specialized Solutions for High-Frequency Operations
Products designed specifically for intensive use scenarios, ensuring durability and performance stability even under continuous operation. - Advanced Wear-Resistant Material Technology
Cutting-edge coating technologies enhance abrasion resistance and extend product lifespan for projects involving sand, gravel, and rough seabed conditions. - Strict Quality Control for Long-Term Reliability
Comprehensive testing including repeated inflation cycles, load testing, and material durability assessments ensures consistent performance. - Efficient Logistics and Global Delivery Capability
Fast production turnaround and reliable global shipping ensure timely delivery for critical project schedules.
Under normal conditions, the bags can be reused for hundreds of cycles with proper maintenance.
Yes, they are highly effective in shallow and confined environments such as rivers and ports.
They are constructed with multi-layer coated fabric specifically designed to resist friction from sand and debris.
With proper preparation, setup and inflation can be completed within minutes.
Avoid contact with sharp objects, monitor air pressure, and ensure proper rigging before lifting operations.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.