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Inflatable Airbag Landing Heavy Lifting Rubber Airbag Boat Lift Air Bags
Heavy lifting air bags, known as marine rubber airbags or ship launching balloons, are made of heavy-duty synthetic-tire-cord layers with inner and outer rubber layers in a long cylindrical balloon shape.
The heavy lifting airbag is updated based on the ship launching airbags, making them more suitable for heavy lifting and moving work. These airbags have a different structure from ship launching airbags and can roll steadily when taking the load, unlike inferior products which are prone to twisting.
As one of the toughest pneumatic lifting airbags available, they can be used for heavy lifting and moving of huge structures, caissons, buildings, and more. Each heavy lifting airbag can reach a lifting capacity of over 1,000 tons.
Why Choose Marine Heavy Lifting Air Bags
Superior manufacturing and quality control processes from raw material selection through the highly skilled production process ensure reliable performance.
Heavy Lifting Airbags Performance
Lifting Capacity Principle
The bearing capacity of ship launching airbags is calculated based on working pressure and contact area, with working pressure determined by burst pressure and safety working factor.
Due to the flexibility of rubber airbags, contact area is affected by various factors including carried ship condition and position relative to gravity center during launching and landing, causing bearing capacity to vary.
F=PS S=π x (D-H)/2
Where: F = bearing capacity P = working pressure S = contact area P = percentage of deformation (%) D = original diameter of the air bag (m) H = height of the compressed air bag (m)
Performance Parameters of Heavy Lifting Airbags
Type No.
Diameter (m)
Initial Internal Pressure for Test (kPa)
Rated Working Pressure (kPa)
Bearing Capacity at 70% compress deformation (KN/m)
Minimum Burst Pressure (kPa)
QP5
0.8
48
210
184
630
1.0
35
170
186
510
1.2
28
140
185
420
1.5
20
110
181
330
1.8
16
90
178
270
2.0
14
80
176
240
Heavy Lifting Air Bags Classification
Our engineering team constantly improves the Structure of Typical Air Bags
Standard Heavy Lifting Airbag Components
The end of the airbag body
End flange (Q235 H.D.G)
Sealing Washer
Three-direction connector at the inflate end (Q235 H.D.G)
3/4′ Ball Valves at the inflate end (Brass)
Hose connection at the inflate end (Q235)
High-quality Pressure Gauge
End plug at the tightness end (Q235 H.D.G)
Classification of Heavy Lifting Airbags
Heavy lifting airbags are categorized by bearing capacity per meter in length, with layer count determining Safety Working Pressure. Custom types are available upon request.
QP - Ordinary airbag with 3, 4 or 5 layers of cord fabric
QG - High-bearing capacity with 6, 7, or 8 layers of cord fabric
QS - Superhigh-bearing capacity with 9, 10, or more layers of cord fabrics
Example: QG6/1.5*15 QG6: 6 layers cord fabric 1.5: diameter is 1.5m 15: length is 15m
Doowin Marine is a professional manufacturer of ship launching airbags, pneumatic rubber fenders, foam-filled fenders, inflatable pipe plugs, and offshore foam buoys.
Doowin Marine is the leading manufacturer of ISO 14409:2011 or CB/T 3795 rubber airbags/marine inflatable airbags. Marine rubber airb... Doowin Marine is a professional manufacturer of ship launching airbags, pneumatic rubber fenders, foam-filled fenders, inflatable pipe plugs, and offshore foam buoys.
Doowin Marine is the leading manufacturer of ISO 14409:2011 or CB/T 3795 rubber airbags/marine inflatable airbags. Marine rubber airb...
