Inflatable Ship Launching Bag Durable Layers High Load Capacity Stable Roll
Product Description
The Hongruntong Marine Air Bag represents an advanced, high-capacity inflatable solution engineered for ship launching, ship landing, heavy lifting, and offshore buoyancy applications. Constructed with multiple layers of high-tensile synthetic cords embedded within natural and synthetic rubber matrices, these air bags offer unparalleled load-bearing capacity, controlled deformation, and exceptional durability under dynamic and static stress conditions.
The inner rubber layer ensures airtight containment, while the cord-reinforced middle layers provide high axial and radial strength to withstand shear and bending forces. The outer abrasion-resistant rubber layer protects against rough surfaces, UV degradation, and chemical exposure, extending operational lifespan.
Compared to traditional steel rollers or slipway infrastructure, marine air bags provide adaptable, low-cost, and rapidly deployable solutions that can conform to uneven terrain, tidal variations, and irregular hull geometries. By combining predictable inflation behavior with precise structural engineering, Hongruntong Marine Air Bags deliver safe and efficient ship-handling solutions while minimizing environmental and civil engineering requirements.
These bags are designed, manufactured, and tested according to ISO 14409 standards, ensuring reliable performance, pressure tolerance, and operational safety in the most demanding marine and industrial scenarios.
Case Study
In 2022, a North American shipyard faced the challenge of launching a 120-meter LNG-fueled tanker weighing approximately 8,500 tons from a constrained riverside slipway with limited depth and no permanent dry-dock facilities. Hongruntong Marine supplied a complete rolling-launch solution consisting of 32 high-diameter (2.0 m × 20 m) air bags, arranged to form a load-distributing array capable of compensating for slight longitudinal and lateral hull inclinations.
Ground preparation involved leveling the launch surface to within ±25 mm tolerance. Each air bag was individually pressure-calibrated to 0.18-0.20 MPa to ensure uniform stress distribution. The launch operation included synchronized electric winches, real-time pressure monitoring, and safety observers positioned along the hull perimeter.
As the vessel rolled over the inflated bags, the system accommodated minor ground slope deviations and uneven weight distribution without requiring external supports. The LNG tanker reached the water safely within six hours, with hull integrity fully maintained. This project not only reduced infrastructure costs by over 65% compared with traditional slipway launches but also demonstrated the feasibility of deploying air bags for ultra-heavy vessels in constrained urban waterways.
Specifications
| Product Name |
Marine Air Bag |
| Material |
100% High Tensile NR |
| Dimensions |
Diameter 0.5m - 3.0m, Length 3.0m - 28.0m, or as Request |
| Working Pressure |
0.05-0.25MPA |
| Technology |
Overall Winding, High Pressure, Explosion Proof |
| Metal Parts |
Q355 / SS304 / SS316 |
| OEM |
Supported |
| MOQ |
1 |
| Repair Tools |
Electric Heating Plate, Repair Materials, Glue, Free of Charge |
| Standard |
ISO14409:2011 |
| Certificate |
ABS, BV, KR, LR, GL, NK, RINA, DNV, RMRS |
| Package |
Pallets, Wooden Cases |
| Service Life |
20 Years |
| Warranty |
36 Months |
Capacity Specifications
| Diameter |
Working Pressure |
Working Height |
Bearing Capacity (KN/m) |
Bearing Capacity (Ton/m) |
| D=1.0m |
0.14Mpa |
0.6m |
87.96 |
8.98 |
|
|
0.5m |
109.96 |
11.22 |
|
|
0.4m |
131.95 |
13.46 |
| D=1.2m |
0.12Mpa |
0.7m |
94.25 |
9.62 |
|
|
0.6m |
113.10 |
11.54 |
|
|
0.5m |
131.95 |
13.46 |
|
|
0.4m |
150.80 |
15.39 |
| D=1.5m |
0.10Mpa |
0.9m |
94.25 |
9.62 |
|
|
0.8m |
109.96 |
11.22 |
|
|
0.7m |
125.66 |
12.82 |
|
|
0.6m |
141.37 |
14.43 |
|
|
0.5m |
157.08 |
16.03 |
| D=1.8m |
0.09Mpa |
1.1m |
98.96 |
10.10 |
|
|
1.0m |
113.10 |
11.54 |
|
|
0.9m |
127.33 |
12.98 |
|
|
0.8m |
141.37 |
14.43 |
|
|
0.7m |
155.51 |
15.87 |
|
|
0.6m |
169.65 |
17.31 |
| D=2.0m |
0.08Mpa |
1.2m |
100.53 |
10.26 |
|
|
1.1m |
113.10 |
11.54 |
|
|
1.0m |
125.66 |
12.82 |
|
|
0.9m |
138.23 |
14.11 |
|
|
0.8m |
150.80 |
15.39 |
|
|
0.7m |
163.36 |
16.67 |
|
|
0.6m |
175.93 |
17.95 |
* Other size can be provided follow client's requirements.
Features
Ultra High Load Capacity and Scalability - Designed for vessels exceeding 10,000 tons, air bag dimensions and reinforcement layers can be customized to match specific weight, length, and hull geometry requirements. Multi-layer construction ensures optimal load transfer and prevents deformation-induced stress points on the hull.
Precision-Controlled Inflation and Deformation - Each air bag allows precise pressure calibration and controlled deflection under load, ensuring stable rolling and lifting operations. Real-time monitoring options can be integrated for continuous operational safety verification.
Durability in Extreme Marine Environments - Outer rubber layers resist abrasion, saltwater corrosion, oil, and UV radiation. Reinforced inner layers retain elasticity and strength under repeated inflation/deflation cycles, extending operational life and minimizing maintenance.
Rapid Deployment and Operational Flexibility - Lightweight relative to steel alternatives, these bags can be transported, positioned, and inflated using standard lifting equipment. Deployment is fast, requiring minimal civil infrastructure, making them ideal for constrained shipyards, offshore platforms, and temporary industrial sites.
Applications
Heavy Ship Launching - Suitable for rolling vessels of various sizes from slipways, piers, or shorelines. Air bags adapt to hull curvature and weight distribution for safe, controlled launches.
Marine Salvage and Buoyancy Support - Can be used as temporary flotation devices for submerged or partially damaged vessels, pipelines, or offshore structures. Adjustable inflation provides precise buoyancy control for lifting, positioning, or recovery operations.
Industrial Lifting and Transport - Capable of moving large offshore modules, prefabricated marine structures, or heavy machinery safely across uneven surfaces. Controlled deformation reduces the risk of structural damage during transport.
Why Choose Hongruntong Marine
Comprehensive Engineering Expertise - Offers detailed load calculations, deployment simulations, and structural analysis to ensure optimal bag arrangement, hull protection, and operational efficiency.
Proven Global Experience - Projects successfully executed across Asia, Europe, North America, and the Middle East for vessels ranging from small patrol boats to 10,000+ ton offshore tankers.
Superior Quality Assurance - Bags are manufactured under ISO 14409 and ISO 9001 standards. Each unit undergoes pressure, tensile, and deformation testing to guarantee long-term reliability.
End to End Support and Training - Provides on-site supervision, safety training, operational guidance, and maintenance programs to ensure optimal performance and longevity of the air bags.
FAQ
1. What types of vessels can Hongruntong air bags handle?
Air bags are suitable for vessels of all sizes, including small boats, ferries, offshore supply vessels, and ultra-heavy tankers exceeding 10,000 tons.
2. How do I determine the correct air bag size and quantity?
The company performs a full engineering assessment including vessel weight, hull geometry, ground slope, and intended operation to recommend exact bag specifications and arrangement.
3. Can the air bags operate in harsh weather or marine conditions?
Yes, they are engineered to resist abrasion, saltwater, UV, oil, and chemical exposure. They maintain elasticity and load-bearing capacity under extreme environmental conditions.
4. Is it possible to monitor air bag pressure during operations?
Yes, sensors can be installed to provide real-time pressure and load monitoring, ensuring safe operations and early detection of anomalies.
5. How long is the operational lifespan of a marine air bag?
With proper deployment, inspection, and maintenance, air bags can be used for several years and multiple operations while retaining full load-bearing capacity.
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