Inflatable Ship Launching Bag Durable Layers High Load Capacity Stable Roll

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.

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.

* Other size can be provided follow client's requirements.