Safety Factor > 5.0
ISO 14409 Certified
Superior Performance
Extended Service Life
Evergreen marine salvage airbags (also known as underwater lift bags) are high-performance buoyancy devices designed for demanding marine operations. These heavy-duty airbags provide reliable lifting force and stability across a wide range of marine engineering applications.
Key Applications
1. Marine Salvage Operations
Underwater lifting: Serve as primary lift bags for shipwreck recovery and submerged object retrieval
Load handling: Function as heavy-duty pneumatic rollers for positioning and transporting massive structures
2. Ship/Structure Launching
Draft reduction: Compensate for insufficient water depth during launch operations
Stabilization: Enhance balance during critical launching phases through strategic airbag placement
3. Offshore Installation & Towing
Pipeline buoyancy control: Provide adjustable flotation support during subsea pipe laying
Shallow-water navigation: Increase freeboard for floating structures to ensure safe passage
Rubber Salvage Airbags vs PVC Salvage Airbags
Evergreen manufactures rubber salvage airbags and PVC salvage airbags, designed for different salvage and buoyancy applications.
Rubber Salvage Airbags – Advantages
- Highly resistant to puncture and abrasion, ideal for underwater salvage in complex and harsh environments
- High working pressure, suitable for deep-water operations
- Large single-unit buoyancy, exceeding 100 tons
- Flexible installation, can be mounted both horizontally and vertically
Disadvantage:
- Heavier weight, installation requires auxiliary equipment
PVC Salvage Airbags – Advantages
- Light weight, easy to transport
- Simple installation, can be handled manually
- Best suited for shallow-water salvage operations
Disadvantage:
- Lower puncture resistance and lower working pressure
Customizable & Technical Support
No matter whether it is rubber or PVC salvage airbags, customization is available in terms of size, shape, safe working pressure, and installation method to meet customer requirements. Our professional technical team ensures fast execution from product design to production.
Rubber cylindrical salvage airbag with the net
PVC salvage airbags
Regular rubber salvage airbags’ performance
| Airbag Diameter(m) | Length(m) | Net Buoyancy(Tons) | Shipping Weight(Tons) | Working pressure(MPa) | Minimum Bursting(MPa) |
| 1 | 12 | 9.1 | 0.294 | 0.15 | 0.5 |
| 1.5 | 12 | 20.7 | 0.458 | 0.11 | 0.4 |
| 1.8 | 18 | 45 | 0.806 | 0.09 | 0.3 |
| 2 | 18 | 55.6 | 0.904 | 0.08 | 0.3 |
| 3 | 18 | 127.2 | 1.483 | 0.05 | 0.2 |
| 3 | 20 | 141.3 | 1.625 | 0.05 | 0.2 |
Regular PVC salvage airbags’ performance
| Model | Lift Capacity | Diameter | Length | Package Size | Appr. Weight | |
| kg | lb | m | m | m | kg | |
| YTCEB-2 | 2000 | 4400 | 1.2 | 2.3 | 1.10*0.40*0.40 | 30 |
| YTCEB-6 | 6000 | 13200 | 1.6 | 3.6 | 1.35*0.50.0.50 | 73 |
| YTCEB-8 | 8000 | 17600 | 1.8 | 3.8 | 1.30*0.60*0.60 | 85 |
| YTCEB-10 | 10000 | 22000 | 2.1 | 3.6 | 1.30*0.80*0.60 | 100 |
| YTCEB-20 | 20000 | 44000 | 2.4 | 5.6 | 1.30*0.80*0.75 | 150 |
| YTCEB-30 | 30000 | 66000 | 2.7 | 6.1 | 1.60*0.90*0.80 | 308 |
