Marine Airbag
The marine airbag is made of synthetic-tire-cord reinforcement layers and rubber layers. Including Ship launching airbag, Heavy lifting airbag, Marine salvage airbag. Ship launching airbags are specialized marine airbags that are used for launching marine vessels,and are also known as marine airbags.Ship launching airbags can be used for the ship launching or ship landing of tanker, tugboat or barges, carrying vessel, carrier, ferry and other special vessels (AHTS, DSV) and so on. The biggest vessel launched by ship launching airbags up to 100,000 DWT.
Ship launching relying on ship launching airbags is a innovative ship launching technology, comparing with “end-on launching”, “side ship launching”, “float-out”. This ship launching technology overcomes the restrictions of fixed launching track of side-launch. Ship launching airbags are accepted by more shipyards worldwide because of its advantages of saving time, saving investment, flexible, safety.
Nanjing Deers Industrial Co., Ltd is the leading supplier of marine airbags in China for over 10 years now. Our airbags have been widely used in Southeast Asia, Europe, Middle-East, North America, Africa, South America. Our expertise, excellent quality and service, flexibility and competitive price satisfy many of our clients.
Ship Launching Airbag
Ship Launching Airbag, a long cylindrical roller bags with hemispherical heads at both ends, is generally considered to be innovative technology with utmost bright prospect in shipbuilding. Comparing with traditional ship-launching methods such as side-way launching, this one requires less permanent infrastructure and lower cost.
Marine Airbag Structure
1. Mouth 2. Head 3. Body D: Bag Diameter LOA: Effective Length L: Total Length
Ship launching airbags are constructed of an outer rubber layer, multilayer synthetic-tire-cord layers, and inner rubber layer vulcanized firmly. In addition, the rubber airbags are cylindrical balloon body, with two conical head and end mouth. Swivels and air inlet kits are screwed with end mouth.
Rubber Airbags End Fittings
1. The end of airbag body
2. End flange (Q235 H.D.G)
3. Sealing Washer to strength the tightness
4. Three-direction connector at the inflate end (Q235 H.D.G)
5. 3/4’Ball Valves at the inflate end (Brass)
6. Hose connection at the inflate end (Q235)
7. High quality Pressure Gauge at the inflate end.
8. End plug at the tightness end (Q235 H.D.G)
Rubber Material Performance
Physical property or rubber material: (comply with ISO 14409: 2011)
Prior to the air bag production, the outer and inner rubber layers shall be tested to meet the criteria in accordance with the test methods given in the International Standards listed below.
The outer rubber layer covers the outside of ship launching airbags. To protects the cord layers from abrasion and other external forces. This compound has sufficient tensile and tear strength to withstand any weather condition and hard usage.
| No | Test item | Required value | Test method | |
| 1 | Tensile strength, MPa | ≥18 | ISO37 | |
| 2 | Elongation at break, % | ≥400 | ISO37 | |
| 3 | Hardness ,°(Shore A ) | 60±10 | ISO7619-1 | |
| 4 | Tear strength, N/cm | ≥400 | ISO34-1 | |
| 5 | Compression set ,%(70°C±1°C,22h) | ≤30 | ISO815-1 | |
| 6 | After thermal ageing at 70°C±1°C96h | Holding of pull lengthening, % | ≥80 | ISO188 |
| 7 | Holding of elongation at break, % | ≥80 | ISO188 | |
| 8 | Change of hardness, °(Shore A) | ≤8 | ISO7619-1 | |
| 9 | Static ozone ageing at 40°Cx 96 h [ozone concentration(50± 5) x10-8] , extension 20 | No crack | ISO1431-1 | |
Ship launching airbags specification
The below”ND-4 and ND-5’’ refer to the number of layers of the synthetic tire cord reinforcement layer. The commonly used air bag layers are 4, 5, 6, 7 and 8 layers. Other layers can also be produced on demand.
Synthetic-tire-cord layer is reinforcement layer of the ship launching airbags which are made of rubber coated synthetic-tire-cord fabrics. Many synthetic-tire cord layers are twined at ideal angles by unique and patented “Holistic Wrapping Technology“. To hold the internal pressure and to distribute the stress evenly. DOOWIN use the 1870 dtex/2 type synthetic-tire-cord fabric. The warp is over 95 cords per 100 mm in width. The breaking strength is more than 310 N per cords.
| NanjingDeers ND-4 Intensive Air Bag for Ship Launching | ||||
| 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 | 113.1 | 11.54 | ||
| 0.5m | 131.95 | 13.46 | ||
| 0.4m | 150.8 | 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 | 10.1 |
| 1.0m | 113.1 | 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 | 113.1 | 11.54 | ||
| 1.0m | 125.66 | 12.82 | ||
| 0.9m | 138.23 | 14.11 | ||
| 0.8m | 150.8 | 15.39 | ||
| 0.7m | 163.36 | 16.67 | ||
| 0.6m | 175.93 | 17.95 | ||
| NanjingDeers ND-5 Intensive Air Bag for Ship Launching | ||||
| Diameter | Working pressure | Working height | Bearing capacity | |
| KN/m | Ton/m | |||
| D=1.0m | 0.18Mpa | 0.6m | 113.1 | 11.54 |
| 0.5m | 141.37 | 14.43 | ||
| 0.4m | 169.65 | 17.31 | ||
| D=1.2m | 0.15Mpa | 0.7m | 117.81 | 12.02 |
| 0.6m | 141.37 | 14.43 | ||
| 0.5m | 164.93 | 16.83 | ||
| 0.4m | 188.5 | 19.23 | ||
| D=1.5m | 0.12Mpa | 0.9m | 113.1 | 11.54 |
| 0.8m | 131.95 | 13.46 | ||
| 0.7m | 150.8 | 15.39 | ||
| 0.6m | 169.65 | 17.31 | ||
| 0.5m | 188.5 | 19.23 | ||
| D=1.8m | 0.10Mpa | 1.1m | 109.96 | 11.12 |
| 1.0m | 125.66 | 12.82 | ||
| 0.9m | 141.37 | 14.43 | ||
| 0.8m | 157.08 | 16.03 | ||
| 0.7m | 172.79 | 17.63 | ||
| 0.6m | 188.5 | 19.23 | ||
| D=2.0m | 0.09Mpa | 1.2m | 113.1 | 12.54 |
| 1.1m | 127.23 | 12.98 | ||
| 1.0m | 141.37 | 14.43 | ||
| 0.9m | 155.51 | 15.87 | ||
| 0.8m | 169.65 | 17.31 | ||
| 0.7m | 183.78 | 18.75 | ||
| NanjingDeers ND-5 Intensive Air Bag for Ship Launching | ||||
| Diameter | Working pressure | Working height | Bearing capacity | |
| KN/m | Ton/m | |||
| D=1.0m | 0.21Mpa | 0.6m | 131.95 | 13.46 |
| 0.5m | 164.93 | 16.83 | ||
| 0.4m | 197.92 | 20.2 | ||
| D=1.2m | 0.18Mpa | 0.7m | 141.37 | 14.43 |
| 0.6m | 169.65 | 17.31 | ||
| 0.5m | 197.92 | 20.2 | ||
| 0.4m | 226.2 | 23.08 | ||
| D=1.5m | 0.14Mpa | 0.9m | 131.95 | 13.46 |
| 0.8m | 163.94 | 15.71 | ||
| 0.7m | 175.93 | 17.95 | ||
| 0.6m | 197.92 | 20.2 | ||
| 0.5m | 219.91 | 22.44 | ||
| D=1.8m | 0.12Mpa | 1.1m | 131.95 | 13.46 |
| 1.0m | 150.8 | 15.39 | ||
| 0.9m | 169.65 | 15.31 | ||
| 0.8m | 188.5 | 19.23 | ||
| 0.7m | 207.35 | 21.16 | ||
| 0.6m | 226.2 | 23.08 | ||
| D=2.0m | 0.11Mpa | 1.1m | 155.51 | 15.87 |
| 1.0m | 172.79 | 17.63 | ||
| 0.9m | 190.07 | 19.39 | ||
| 0.8m | 207.35 | 21.16 | ||
| 0.7m | 224.62 | 22.92 | ||
| 0.6m | 241.9 | 24.68 | ||
Heavy Lifting Airbag
Heavy lifting
airbags are the most tough pneumatic bags that are used to provide
excellent land transport of various heavy & huge structures such as large
vessels and heavy loads comparied with marine salvage airbags. They are more flexible and economical than traditional lifting methods
like trolley without need of spillway construction.
Marine Salvage Airbag
Marine salvage airbags have similar structures to ship launching airbags but feature some optimal designs for salvage and flotation applications taking advantage of stiff and lightweight structure, lifting belts and buckles. Rubber belts are usually used to fasten airbags together and buckles make the binding much easier. Safe valves, mounted to the ends of airbags, are ideal for releasing inner pressure automatically when marine salvage airbags are applied in deep water.
Why choose us
Nanjing Deers marine airbags use the enlacing technology which achieves no joints or seams of whole airbag structure. Also two conical ends of airbag are reinforced with extra two layers. The innovative design improves the safety and performance of the marine airbags.
The commitment to quality is our top priority. From the raw materials to the highly skilled production process, our engineering team constantly improves. We make sure all the airbags will be tested according to ISO14409:2011 before delivery. Also if clients request, we can also accept any third party testing before the shipment.
Nanjing Deers controls the cost by advanced management system. We equip the rubber material mixing machine, production facilities, vulcanizing tank and whole set of testing facilities, which help us to keep our costs to a minimum.
We can response to your questions with 7/24. Our professional technical team can design the airbags according to your vessel/ship/dredger information.
In addition to the daily tracking of the orders, we can also give our clients technical support on launching instructions, repair, storage and so on.
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