QINGDAO SHUNHANG MARINE SUPPLIERS CO., LTD.
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Barge Docking Lifting Pneumatic Rolling Marine Rubber Airbag
Product Introduction:
History of marine rubber airbags.
The airbags is invented in China in about 1986 by some experienced engineers, to help launching small boats in rivers. After years of development of technology, the airbags are adopted to launch huge ship weigh up to 9000 tons or more.
Material: an airbag contains several layers of rubber-dipped Nylon fabric+1 layer of rubber. For example,
7 layers of airbag, means 7 layers of rubber-dipped Nylon fabric + 1 layer of outer rubber.
Every two layers are stick with glue solution and pressed together. The body of airbag is integrate wrapped.
Different layers
The layers varies with the weight and size of ship, as well as the condition of ship launching.
But generally speaking, we will give our suggestion first, and we will produce as the requirement of clients.
Specifications:
| Some common sizes of our ship launching airbags, customized sizes are also available | |||
| Diameter(m) | Effective Length(m) | Layer | Pressure(MPa) |
| 1.0 | 10 | 5~6 | 0.07~0.10 |
| 1.0 | 12 | 5~6 | 0.07~0.10 |
| 1.0 | 15 | 5~6 | 0.07~0.10 |
| 1.2 | 10 | 5~6 | 0.08~0.12 |
| 1.2 | 12 | 5~6 | 0.08~0.12 |
| 1.2 | 15 | 5~6 | 0.08~0.12 |
| 1.5 | 12 | 5~8 | 0.08~0.16 |
| 1.5 | 15 | 5~8 | 0.08~0.16 |
| 1.5 | 18 | 5~8 | 0.08~0.16 |
| 1.5 | 20 | 4~8 | 0.08~0.16 |
| 1.5 | 24 | 5~8 | 0.08~0.16 |
| 1.8 | 12 | 5~8 | 0.08~0.15 |
| 1.8 | 15 | 5~8 | 0.08~0.15 |
| 1.8 | 18 | 5~8 | 0.08~0.15 |
| 1.8 | 20 | 5~8 | 0.08~0.15 |
| 1.8 | 24 | 5~8 | 0.08~0.15 |
| 2.0 | 18 | 6~10 | 0.08~0.18 |
| 2.0 | 20 | 6~10 | 0.08~0.18 |
| 2.0 | 24 | 6~10 | 0.08~0.18 |
| 2.5 | 18 | 7~10 | 0.07~0.13 |
| 2.5 | 20 | 7~10 | 0.07~0.13 |
| 2.5 | 24 | 7~10 | 0.07~0.13 |
As a soft flexible body, airbag’s shape depends on various factors, such as the shape of ship bottom, ramp shape, width of ship bottom, length of airbag, position of airbag under the ship, etc.
Users should calculate the bearing capacity of airbags basing on above factors, correct bearing capacity accordingly.
Caculation of performance of airbags
Formula: Bearing capacity F=PS
P=pressure in the airbag(MPa)
S=contacting area between ship bottom and airbag(M²)
S= π*(D1-D2)/2
Application:
For ship upgrading, conversion or new/repair launching
For hoisting and transporting heavy structures up to 10,000 metric tons
For floating use purpose as improve the draft.
For salvaging sunken ship or heavy immersed steel structure
Culvert making for architecture engineering
FAQ:
Q1: The length you marked is effective or total length ?
Answer: All the size we marked is effective length, not include the cone head parts.
2Q: What's the MOQ of your marine rubber airbag?
Answer: Our MOQ is 1pc.
Q3: What's the lifespan of your marine rubber airbag?
Answer: Designed lifespan of our marine rubber airbag is 6 to 10 years
Q4: What's your warranty period?
Answer: Our warranty period is 2 years. we will responsible for the repairment or replace the new ones for you if it proved to be our quality problem.
Q5: What kind certificate you can provide.
Answer: BV,ABS,CCS,SGS etc.certificates are available
Q6: Can you suffest suitable marine rubber airbags size and quantity ?
Answer: We have more than 20 years' experience. Pls tell us your ship information, we can suggest suitable size and quantity for you.
Q7: I want to try your marine rubber airbags, but I don't know how to use, can you help ?
Answer: Yes, we will send instruction book together with the marine rubber airbags.