The cylindrical Underwater Air Lift Bag is a specialized buoyancy solution engineered for offshore construction, subsea installation, and heavy-duty marine lifting operations. Manufactured using high-tenacity synthetic polyester fabric reinforced with multiple layers of abrasion-resistant elastomer coating, ensuring exceptional durability in aggressive marine environments.
The material structure provides superior resistance to saltwater corrosion, ultraviolet radiation, hydrostatic pressure, and temperature fluctuations ranging from -30°C to +70°C. The cylindrical design delivers uniform buoyancy distribution and improved vertical lift efficiency, minimizing lateral movement during operation.
In a large-scale offshore pipeline installation project in the Persian Gulf, Hongruntong cylindrical underwater air lift bags were deployed along multiple sections of the pipeline to provide controlled buoyancy. By carefully adjusting internal air pressure, the pipeline was gradually lifted, aligned, and stabilized during installation.
This method minimized seabed friction and prevented structural stress on the pipeline. The use of air lift bags reduced dependence on heavy-lift vessels and shortened the installation timeline by approximately 38%, while significantly decreasing diver workload and improving operational safety.
| 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 requested |
| 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, ±0.2mm on thickness, ±0 to +3mm on width, ±0 to +3mm on length |
| Model | Buoyancy (kg) | Buoyancy (lbs) | Diameter (mm) | Length (mm) | Approx. 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 |
Note: Other sizes can be customized according to requirements.
