Customized Sizes ISO 9001 Certifiied Inflatable Rubber Ship
Launching Airbags
Product Introduction:
History of Ship Launching 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.
Technical Requirement
According to CB/T 3795--1996, ship launching airbags should meet
the following requirements.
1. Dimensional Deviation
Diameter & Effective Length Deviation: ±2%
Total Length Deviation: ±4%
2. Amount of Elastic Deformation: diameter deformation amount ≤ 5%
under 1.2 times working pressure.
3. Safety Factor: >4.5
4. Air Tightness: depressurization < 5% after 1hour inflation
5. Surface Quality: fairing line shape, no crack, no bubble, no
double skin, no impurities, no distinct dirt and other apparent
defect.
6. end part anti-explosion design
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 |
Caculation of performance of airbags
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.
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
Attention During Application
1)Working pressure must be controlled strictly, it is not allowed
to exceed the working pressure.
2)No sharp and protruding hard object on the contacting surface of
the airbags, to avoid the puncture on the skin of airbags.
3)Avoid the distortion along the length of airbag.
4)Empty inflating test must be performed if the airbags were not
used for a long time or after reparation. The pressure should be as
same as the testing pressure of our company. Inspectors must be at
least 3 meters away from the airbags. For repaired airbag which was
damaged in large scale, its working pressure should be lowered
reasonably. Besides, annual check should be conducted on airbags
which are used frequently.
5)Don’t drag the airbags on the ground.
Storage of The Ship Launching Airbags
1)If the airbags won’t be used for quite a long time, it shall be
washed and dried, filled with talcum powder inside and coated with
talcum powder outside, place it in dry, shady and ventilated place
in the warehouse.
2)Place string the airbags should be far away from the heat source.
3)The temperature of the warehouse should be kept no more than 30℃.
4)Keep the airbags away from acid, alkali, grease and organic
solvent.
5)The airbags should be stretched flat when not used. It is not
allowed to pile up and stack heavy object on the airbag.
Application:
