| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 2680 Pcs Per Month |
| Delivery Time | 5-7 Work Days |
| Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Marine Air Bag |
| Material | High Tensile NR |
| Inner Layer | Natural Rubber |
| Diameter | 0.5M-3.0M or as Request |
| Feature | Safe and Environmentally Friendly |
| Reinforcement | Cord Fabric Layer |
| Length | 3M-28M or as Request |
| Outer Layer | Natural Rubber |
| Working Pressure | 0.05-0.25 MPA |
| Standard | ISO14409:2011 |
| Product Life Expectancy | >20 years |
| Thickness | 5-13Ply, or as Request |
| Application | Vessel Launching and Docking |
| Colour | Black or Customized |
| Brand Name | Hongruntong Marine |
| Model Number | HM-MAB78 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China |
View Detail Information
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 2680 Pcs Per Month |
| Delivery Time | 5-7 Work Days | Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Marine Air Bag | Material | High Tensile NR |
| Inner Layer | Natural Rubber | Diameter | 0.5M-3.0M or as Request |
| Feature | Safe and Environmentally Friendly | Reinforcement | Cord Fabric Layer |
| Length | 3M-28M or as Request | Outer Layer | Natural Rubber |
| Working Pressure | 0.05-0.25 MPA | Standard | ISO14409:2011 |
| Product Life Expectancy | >20 years | Thickness | 5-13Ply, or as Request |
| Application | Vessel Launching and Docking | Colour | Black or Customized |
| Brand Name | Hongruntong Marine | Model Number | HM-MAB78 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS | Place of Origin | China |
| High Light | marine air bag for boat launching ,flexible boat launching airbag ,anti-wear marine air bag | ||
Boat Launching Airbag Flexible Operation Anti Wear Surface Efficient Launching
Description
Hongruntong Marine Air Bags are state-of-the-art inflatable solutions designed to meet the demanding needs of modern shipyards, offshore engineering projects, and heavy-load industrial transport. Constructed from multiple layers of high-strength synthetic fiber cords embedded in a natural and synthetic rubber matrix, these air bags deliver exceptional tensile and shear strength, uniform load distribution, and controlled deformation under both static and dynamic conditions. The inner layers ensure airtight integrity and elasticity, while the middle reinforcement layers bear axial and radial stresses, preventing over-compression and reducing hull damage risk. The outer abrasion-resistant rubber layer protects against mechanical wear, seawater corrosion, oils, and UV exposure, providing extended operational life even in harsh environments.
Unlike traditional slipways or steel roller systems, marine air bags provide a flexible, low-cost, and rapidly deployable solution capable of adapting to uneven terrain, variable hull shapes, and tidal fluctuations. Their design incorporates ISO 14409-certified specifications and has undergone rigorous testing to guarantee pressure tolerance, load-bearing capability, and long-term reliability. With predictable inflation behavior and precise engineering, Hongruntong Marine Air Bags optimize operational safety, reduce infrastructure costs, and enable efficient launching, hauling, or flotation of vessels in constrained or temporary settings.
Case Study
In 2021, a Southeast Asian shipyard faced the challenge of relocating a 3,200-ton container vessel from a riverside construction site to a deep-water dock, where traditional slipway launching was impossible due to space limitations and uneven terrain. Hongruntong supplied 24 marine air bags with a diameter of 1.8 meters and length of 18 meters. The operation required careful load calculation and precise placement to ensure uniform hull support during the roll.
Ground preparation involved leveling a 200-meter transit path and installing a series of guide rails to prevent lateral movement. Each air bag was inflated to a pressure between 0.15–0.18 MPa and tested under simulated vessel weight prior to the launch. Synchronized electric winches moved the vessel along the air bag array, with operators monitoring pressure sensors and hull elevation continuously. The bags absorbed surface irregularities, compensated for slight gradient variations, and maintained stable contact with the hull, ensuring minimal stress on the vessel’s structure.
The operation was completed in 10 hours, achieving a safe, controlled launch into the water with no hull damage. The project highlighted the bags’ ability to handle mid-sized container vessels in constrained environments, demonstrating a cost-effective alternative to permanent slipway construction. By eliminating extensive civil engineering work and reducing manpower requirements, the shipyard saved over 60% in project costs compared to conventional methods.
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 |
| Diameter | Working Pressure | Working Height | Bearing Capacity | |
| KN/m | 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
Optimized Air Retention Liner for Long Term Stability
The interior of our air bags features a specialized low-permeability liner that significantly reduces the rate of air diffusion. This engineering ensures consistent pressure is maintained over extended periods, which is critical for multi-day operations like vessel transfers or long-term quayside support. This eliminates the need for frequent re-inflation, enhances operational safety by preventing unexpected settling, and reduces compressor runtime and energy costs.
Superior Ozone and UV Resistance for Extended Outdoor Service Life
The outer rubber compound is specifically formulated with anti-ozonants and UV stabilizers. This provides robust protection against the degrading effects of sunlight and atmospheric ozone, which can cause cracking and embrittlement in standard rubbers. This feature is essential for bags stored on-site or used in sunny climates, as it preserves the material's integrity and mechanical properties, ensuring long-term reliability and reducing replacement frequency.
Uniform Load Distribution Design to Prevent Hull Stress
The bag's cylindrical shape and reinforced construction are engineered to distribute the vessel's weight over a large, uniform contact area. This design prevents point loading and high-stress concentrations on the hull, which is a critical concern for vessels with complex or thin hull structures. By ensuring even support, we protect the structural integrity of the vessel throughout the launching, landing, or lifting process.
Robust, Corrosion Resistant Fittings for Marine Environments
All external metal components, including air valves and lifting lugs, are constructed from 316-grade stainless steel or heavily galvanized carbon steel. This provides exceptional resistance to corrosion from saltwater spray and high humidity, ensuring the critical connection points remain fully functional and easy to operate even after prolonged exposure to harsh marine conditions, thereby enhancing the overall durability and safety of the system.
Applications
Ship Transfer and Positioning Over Land
Detailed Description: Air bags facilitate the horizontal movement of vessels over land between different locations within a shipyard. This is crucial for transferring a ship from one dry dock to another, moving it to a different painting or outfitting berth, or repositioning it for storage. The bags act as a mobile, flexible cradle, allowing for precise maneuvering and turning, even over long distances and unprepared ground, where rail-based systems are impractical or too expensive to install.
Emergency Salvage and Wreck Removal
Detailed Description: In salvage operations, air bags are deployed underwater by divers and strategically positioned under sunken or grounded vessels. Upon inflation, they generate immense buoyant uplift, used to refloat the vessel or to roll it upright. Their flexibility allows them to conform to uneven seabeds and damaged hulls. In wreck removal, they are used to lift large sections of a wreck for cutting and disposal, providing a powerful and adaptable lifting force in challenging and unpredictable marine environments.
Docking and Fendering Assistance
Detailed Description: Air bags serve as versatile, high-performance fenders and docking aids. They can be used as temporary fendering systems at docks lacking permanent infrastructure, providing superior energy absorption and low reaction force to protect both the vessel and the quay. They are also used in ship-to-ship (STS) transfer operations, acting as a soft, large-contact-area buffer between two hulls. Furthermore, they can be used to assist in pivoting or aligning a vessel during a difficult berthing maneuver.
Why Choose Hongruntong Marine
Unmatched Technical Heritage and Field Expertise
Hongruntong is not merely a manufacturer; we are pioneers and problem-solvers. Our engineers possess decades of collective experience in marine civil engineering and naval architecture. This deep well of knowledge allows us to tackle unique challenges, from launching ships in geographically constrained yards to executing complex salvage operations. When you partner with us, you are leveraging a legacy of successfully completed projects and practical, field-tested solutions that cannot be found in a textbook.
End to End Project Lifecycle Management
We provide a comprehensive partnership that extends far beyond product delivery. Our service encompasses initial feasibility studies, detailed method engineering, on-site operational supervision, and post-project review. We manage the entire technical scope, ensuring that every variable—from soil bearing capacity to tidal patterns—is accounted for. This turnkey approach de-risks your project, guarantees procedural compliance, and delivers peace of mind, ensuring your operation is executed safely, on time, and within budget.
Commitment to RD and Continuous Innovation
Our product line is the result of a continuous investment in research and development. We actively collaborate with material science institutes and leverage advanced computational modeling, such as Finite Element Analysis (FEA), to push the boundaries of performance and safety. This commitment ensures that our clients always have access to the latest technological advancements, from advanced polymer compounds to integrated monitoring systems, giving you a measurable competitive edge in efficiency and safety.
Global Logistics and Localized Technical Support
With a robust global supply chain and a network of technical support partners, we guarantee that the right equipment and expertise are available where and when you need them. We understand the time-critical nature of marine operations. Our ability to rapidly deploy equipment and certified field engineers to any major port worldwide minimizes your project lead times and ensures that you have immediate, expert support throughout the duration of your project.
FAQ
Q1: What is the typical lead time for a standard order of marine air bags?
A: For standard models from our catalog, the lead time is typically 4-6 weeks from order confirmation to shipment. This allows for optimal production scheduling and quality control. Lead times for custom-sized bags or large-volume projects will be confirmed during the project quotation phase.
Q2: How do you ensure the quality and consistency of your raw materials?
A: We implement a rigorous supplier qualification program and source our high-tensile synthetic cords and specialty rubber compounds from a select group of certified partners. Every batch of raw material undergoes incoming inspection and testing, including tensile strength, elongation, and adhesion tests, to ensure it meets our strict specifications before entering production.
Q3: What is included in your standard technical support package?
A: Our standard package includes a detailed Launching/Landing Procedure Manual tailored to your project, which covers bag layout, pressure calculations, and a step-by-step operational guide. We also provide comprehensive technical data sheets and access to remote engineering consultation via email or video conference to assist with planning and troubleshooting.
Q4: Can your air bags be repaired in the field, and do you offer a repair service?
A: Minor external abrasions can be addressed with field repair kits. However, for significant damage, such as deep cuts or suspected internal cord damage, we strongly recommend returning the bag to our factory for a professional assessment and vulcanized repair. We offer a dedicated repair service to restore bags to their original performance standards, which is often more cost-effective than replacement.
Q5: How do we determine the correct size and quantity of air bags for our specific vessel?
A: Bag selection is based on a technical calculation that considers the vessel's launching weight, hull form, and the specific conditions of your shipyard (e.g., gradient, ground bearing capacity). This analysis is a core part of our pre-sales engineering service. We require key vessel parameters, and our engineering team will then provide a recommended bag configuration and launch plan.
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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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