Qingdao Luhang Marine Airbag and Fender Co., Ltd
Qingdao Luhang Marine Airbag and Fender Co., Ltd We are devoted to supplying guaranteed marine airbags and fenders.
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Our Inflatable Marine Airbags have an innovative inflatable structure for easy inflation and deflation, being highly versatile. Suitable for ship launching, docking, and undocking, they adapt to various marine applications and provide necessary support.
Key selling points: can withstand heavy weights for ship safety, simple inflation and deflation for convenience, made of high-strength materials for puncture and wear resistance.
Operate within a pressure range of 0.2-0.4Mpa for safety and stability. Cylindrical shape for optimal performance and support for diverse vessel sizes. Choose our airbags for better quality, performance, and safety in marine operations. Upgrade with the best in the industry.
Lay uninflated cylindrical airbags at the bottom of the boat. Inflate to lift the boat, remove obstacles below, then release some air bags at the back and push the boat a bit. This is how a ship is launched. Ship launching in the shipbuilding industry is complex. Inland and coastal ships are launched by rail sliding or air bag rolling. Rail sliding needs a slipway or dock and is only for large shipyards due to high cost.
Marine air bags are popular with small and medium shipyards for low investment and wide application. They are widely used for ship launching and docking in Asian and American countries. More than 80% of new ships under 60,000 DWT are launched by marine airbags. Launching with air balloons is flexible. Any flat ground with a slight decline can be a slipway. Airbags can launch a ship even on a bank 1 or 2 meters above water level.
Marine Airbags Material and Structure
Luhang marine airbag for ship launching has a designed structure with five functional rubber membranes. It's made by patented whole enlacing technology with no joints on the cylindrical body and hemispherical heads.
- Outer and inner rubber layer: The outer layer protects underlying layers from abrasion and external forces. It has sufficient tensile and tearing strength.
- Synthetic-tire-cord layer for reinforcement: Reinforcement cord layers made of synthetic-tire-cord are arranged at ideal angles to hold internal pressure and distribute stress evenly for strong reinforcement.
- End fittings: Include air tightness swivel and safety air inlet. The airbag has a cylindrical body and two conical heads with metal bushings and plugs for air inflation.
Refer to the drawing below for structure and accessories.
Why Choose us and Marine Airbags?
We are a leading professional manufacturer of marine airbags with over 20 years of experience. With mature technology, experienced workers and strict quality control, we guarantee high-quality airbags, especially in air tightness. Here's the production flow.
We are a credible company making marine air bags with optimized rubber material, various sizes and layers. ISO certified with many product patents. Airbags are inspected and approved by third parties like BV, SGS, V-Trust, etc., with excellent high pressure and airtightness performance.
Size and Performance of our Marine Airbag
Ship launching airbags can be customized in various sizes and layers based on ship size, weight, and launching or docking conditions.
- Effective length: Ideally, it should be equal to the ship's breadth or 1 meter shorter. We can produce airbags ranging from 5m to 24m in length.
- Diameter: Choose diameter according to ship size and work requirements. Larger ships need bigger airbags, while small boats can use smaller ones. For ship bottom cleaning or repair, bigger airbags allow workers to work more comfortably. Diameters of 1.5m, 1.8m, 2m, or 2.5m are suitable for large ships.
- Number of layers: More layers mean greater bearing capacity. To lift a ship to a certain height, sufficient airbags with enough layers are required. Generally, 6-layer airbags are sufficient for most projects. In some demanding situations, 7-8 layers may be needed for enhanced performance, such as when lifting heavy caissons with limited contact area, requiring higher pressure and more plies for safety.
Proper selection of marine airbags is crucial for the success of marine projects. Gaining basic knowledge of airbag selection and consulting with manufacturers can help complete projects in the shortest time.
Here is a chart for the bearing capacity of several sizes.
| Size | Diameter | 1.0m, 1.2m, 1.5m, 1.8m, 2.0m, 2.2m, 2.5m, 2.8m, 3.0m |
| Effective Length | 6m, 10m, 12m, 15m, 18m, 20m, 22m, 24m, etc | |
| Layers | 4 layers, 5 layers, 6 layers, 8 layers, 10 layers, 12 layers |
| Model | Dia | Effective Length | Overall Length | Cord Layer | Rubber Plate | Thickness | Working Pressure | Bursting Pressure | Lifting Height | Bearing Capacity | |
| M | M | M | Layer | Layer | mm | MPa | MPa | M | Ton/meter | Ton/airbag | |
| LH-6 | 1.2 | 12 | 14 | 6 | 1 | 7.2 | 0.17 | 0.75 | 0.90 | 7.85 | 94.20 |
| 1.00 | 5.23 | 62.76 | |||||||||
| 1.10 | 2.62 | 31.44 | |||||||||
| LH-7 | 1.5 | 15 | 17 | 7 | 1 | 8.2 | 0.16 | 0.70 | 1.00 | 12.21 | 183.15 |
| 1.10 | 9.77 | 146.55 | |||||||||
| 1.20 | 7.33 | 109.95 | |||||||||
| 1.30 | 4.89 | 73.35 | |||||||||
| LH-8 | 1.8 | 18 | 20.5 | 8 | 1 | 9.2 | 0.15 | 0.67 | 1.20 | 13.96 | 251.28 |
| 1.30 | 11.63 | 15.12 | |||||||||
| 1.40 | 9.31 | 167.58 | |||||||||
| 1.50 | 6.98 | 125.64 | |||||||||
| 1.60 | 4.65 | 83.70 | |||||||||
| LH-10 | 2.0 | 20 | 23 | 10 | 1 | 11.2 | 0.17 | 0.75 | 1.30 | 18.32 | 366.40 |
| 1.40 | 15.70 | 21.98 | |||||||||
| 1.50 | 13.09 | 261.80 | |||||||||
| 1.60 | 10.47 | 209.40 | |||||||||
| 1.70 | 7.85 | 157.00 | |||||||||
Please do not hesitate to contact us for any inquiry.
. In case you are not sure of the suitable sizes and sufficient layers of a launching project or ships, you are welcome to consult us for information. You need provide us with following information:
-Ship size: breadth (width) and Length
-Ship weight: weight of vessel without cargo is better
-Lifting height: the maximum height to lift the ship from the ground
-The slipway condition: the declining angel, the ground condition etc