Hongruntong Marine LLC.
| Supply Ability | 2140 Pcs Per Month |
| Color | Black, Yellow, Orange, or as Request |
| Material | PVC Coating Fabric |
| Delivery Time | 5-7 Work Days |
| Lifting Capacity | 200kg to 50 tons |
| Reinforcement | Nylon Fabric |
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram |
| Application | Structural Load Testing, Proof Load Testing |
| MOQ | 1 |
| Feature | Durable Construction, Easy Filling and Emptying |
| Layers | 1-6Ply, or as Request |
| Thickness | 0.4mm-2.5mm, or as Request |
| Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Boat Air Bags |
| Model Number | HM-BAB68 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Brand Name | Hongruntong Marine |
| Place of Origin | China |
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Product Specification
| Supply Ability | 2140 Pcs Per Month | Color | Black, Yellow, Orange, or as Request |
| Material | PVC Coating Fabric | Delivery Time | 5-7 Work Days |
| Lifting Capacity | 200kg to 50 tons | Reinforcement | Nylon Fabric |
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram | Application | Structural Load Testing, Proof Load Testing |
| MOQ | 1 | Feature | Durable Construction, Easy Filling and Emptying |
| Layers | 1-6Ply, or as Request | Thickness | 0.4mm-2.5mm, or as Request |
| Packaging Details | Wooden Pallets, Wooden Box | Product Name | Boat Air Bags |
| Model Number | HM-BAB68 | Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Brand Name | Hongruntong Marine | Place of Origin | China |
| High Light | Durable Construction Boat Air Bags ，Corrosion Resistant Underwater Air Lifting Bags ，Low Maintenance Inflatable Buoyancy Bags | ||
Engineered pneumatic flotation devices designed for underwater salvage, controlled vessel refloating, submerged equipment recovery, temporary buoyancy, marine construction, and underwater positioning operations.
The cylindrical structure provides a longitudinal lifting body capable of generating buoyancy beneath a defined section of a submerged load. Through controlled inflation with compressed air, the bag increases its submerged volume and displaces water, creating an upward buoyant force that can be regulated according to the requirements of the lifting procedure.
Manufactured from reinforced rubber incorporating high-strength synthetic cord fabric, these lifting bags offer exceptional durability and performance in demanding marine environments.
A marine salvage company in Northern Europe successfully recovered a 145 tonne steel fishing vessel that had grounded in a shallow tidal harbor. Using multiple cylindrical underwater lifting bags, the recovery team restored sufficient buoyancy while maintaining the vessel's transverse stability during changing tidal conditions.
The staged lifting sequence allowed the recovery contractor to work within a restricted operational window, demonstrating the value of controlled pneumatic buoyancy in challenging marine environments.
| Product Name | Boat Air 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) | 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.
Yes, they can be used in suitable tidal recovery operations. However, the lifting plan should account for changes in water level, vessel draft, seabed contact, current, and vessel stability. Inflation should be controlled according to the actual recovery condition.
The elongated body distributes displacement along its effective length, allowing upward force to act over a larger supporting area. When several bags are installed at different locations, the overall buoyancy can be distributed according to the vessel's structural arrangement.
They are designed for marine environments and can operate in seawater and normal sedimentary conditions. However, sharp rocks, exposed metal, cutting edges, and severe abrasion points should be removed or protected before installation.
The external rubber surface, reinforcement exposure, end sections, valves, fittings, connection points, and overall shape should be inspected. Cuts, punctures, abnormal deformation, severe abrasion, or other structural damage should be evaluated before returning to service.
Yes. Diameter and effective length can be configured according to available installation space and required buoyancy. Valve positions, end fittings, reinforced connection areas, and other components can also be specified according to engineering requirements.
Company Details
Business Type:
Manufacturer
Year Established:
1990
Total Annual:
5,256,780-5,593210
Employee Number:
220~360
Ecer Certification：
Verified Supplier
Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma... Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma...
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