Buoyancy Bags High Strength Easy Handling Reliable Performance
Durable Design
Description
Buoyancy Bags are high-performance inflatable devices designed for
underwater lifting, floatation, and subsea support operations.
Constructed from reinforced rubber and high-strength synthetic
fabrics, these bags offer reliable buoyancy, high load-bearing
capacity, and long-term durability. Their cylindrical design
ensures even stress distribution, reducing the risk of deformation
during inflation and extending operational lifespan.
Equipped with precision inflation and deflation valves and
reinforced lifting eyes, Buoyancy Bags provide secure attachment to
slings, chains, or rigging lines. The materials are resistant to
abrasion, UV radiation, and saltwater corrosion, allowing safe
deployment in harsh marine conditions. Compatible with compressed
air or inert gas systems, these bags are highly adaptable for
diverse underwater lifting applications.
Case Study: Submerged Vehicle Recovery in Harbor
In 2023, a coastal harbor faced an emergency when a small cargo
vehicle accidentally slipped into a shallow dock area. Traditional
cranes could not safely reach the vehicle due to limited water
depth and surrounding structures. The engineering team deployed
Buoyancy Bags to lift the vehicle underwater without causing
further damage.
Three Buoyancy Bags, each 1.5 meters in diameter, were attached to
the vehicle using reinforced slings. Controlled inflation allowed a
gradual and stable lift, preventing sudden jolts that could damage
the vehicle or nearby infrastructure. The vehicle was safely
floated to the dockside, where it was retrieved with minimal risk.
This operation highlighted the stability, reliability, and precise
handling of Buoyancy Bags under confined and challenging
conditions. Post-operation inspection confirmed that the bags
retained structural integrity, with no damage to materials or
seams. The success of this project demonstrated that Buoyancy Bags
are an effective solution for emergency salvage and controlled
subsea lifting.
Specifications
| Product Name | Buoyancy Bags |
| Raw Material | PVC coating fabric |
| Type | Cylindrical |
| Size | 500kg, 1000kg, 5000kg 10000kg,etc |
| Thickness | 0.4-1.2mm, or as request |
| Color | Yellow, Blue, Black, etc |
| Density | 0.33-0.9g/cm3 |
| Safety Factor | 7:1 |
Tolerances | +/- 0.03 on densities +/- 0.2 mm on thickness +/- 0 to +3mm on width +/- 0 to +3mm on length |
| Model | Buoyancy | Diameter | Length | Appr. Weight |
| Cylindrical | [kg] | [lbs] | [mm] | [mm] | [kg] |
| HM-ULB01 | 200 | 441 | 500 | 1,000 | 5 |
| HM-ULB02 | 500 | 1,103 | 800 | 1,000 | 8 |
| HM-ULB03 | 1,000 | 2,205 | 1,000 | 1,500 | 11 |
| HM-ULB04 | 2,000 | 4,410 | 1,300 | 1,500 | 20 |
| HM-ULB05 | 4,000 | 8,820 | 1,600 | 2,000 | 50 |
| HM-ULB06 | 6,000 | 13,230 | 2,000 | 2,000 | 66 |
| HM-ULB07 | 8,000 | 17,640 | 2,000 | 2,600 | 75 |
| HM-ULB08 | 10,000 | 22,050 | 2,400 | 2,400 | 80 |
| HM-ULB09 | 15,000 | 33,075 | 2,600 | 3,000 | 110 |
| HM-ULB10 | 20,000 | 44,100 | 3,000 | 3,000 | 130 |
| HM-ULB11 | 30,000 | 66,150 | 3,000 | 4,500 | 170 |
| HM-ULB12 | 50,000 | 110,250 | 4,000 | 4,000 | 220 |
| HM-ULB13 | 70,000 | 154,350 | 4,000 | 5,700 | 310 |
| HM-ULB14 | 100,000 | 220,500 | 4,000 | 8,000 | 450 |
| HM-ULB15 | 150,000 | 330,750 | 5,000 | 8,000 | 660 |
| HM-ULB16 | 200,000 | 441,000 | 5,000 | 10,000 | 900 |
| *Note: Other sizes can be customized according to the requirements. |
Features
High Strength Material Construction
Buoyancy Bags are made from multi-layer reinforced rubber and
synthetic fabrics, providing exceptional tensile strength.
Manufacturing through high-pressure vulcanization ensures uniform
material performance and resilience under both static and dynamic
loads. Reinforced lifting eyes distribute stress evenly, preventing
localized wear and ensuring safe attachment during operations.
Precise Buoyancy Control
Equipped with advanced valves, Buoyancy Bags allow operators to
control lift forces accurately, providing smooth and safe
underwater lifting. The cylindrical design ensures stability and
minimal rotation during inflation, critical for precision in subsea
positioning or salvage work.
Durability in Marine Environments
These bags are engineered for long-term exposure to saltwater, UV
light, and mechanical abrasion. Reinforced seams and high-quality
rubber maintain structural integrity through repeated inflations.
This durability minimizes maintenance needs and ensures reliable
performance in demanding conditions.
Flexible Operational Use
Buoyancy Bags are compatible with compressed air or inert gas
inflation, making them suitable for various lifting scenarios.
Lightweight yet high-capacity, they are easy to transport and
deploy. Multiple bags can be combined for larger lifts, offering
scalable and adaptable solutions for different underwater tasks.
Applications
Marine Salvage
Buoyancy Bags are ideal for lifting sunken vehicles, small vessels,
or cargo containers. Controlled buoyancy allows gradual ascent,
minimizing risk to the load or environment. Their cylindrical shape
ensures balanced and stable lifting, even with uneven or irregular
objects.
Offshore Construction
They assist in positioning subsea structures, pipeline sections, or
modular platforms. Their strength and stability provide safe and
precise deployment in moderate currents or wave action, ensuring
reliable underwater handling.
Underwater Maintenance and Inspection
Buoyancy Bags can lift or stabilize subsea equipment for
maintenance or inspection. Operators can use multiple bags to
target specific sections, allowing divers or ROVs to access
components safely and efficiently.
Advantages
Proven Engineering Expertise
Hongruntong Marine has over 15 years of experience in designing
high-performance underwater lifting solutions. Each Buoyancy Bag
undergoes stress analysis and rigorous testing to meet
international safety and operational standards.
High Quality Materials and Manufacturing
We use only premium rubber and synthetic fabrics, ensuring
resistance to environmental stressors and high tensile strength.
Quality control includes material inspection, seam testing, and
pressure validation, guaranteeing reliability in real-world
operations.
Custom Solutions
We provide tailored sizes, lifting capacities, and attachment
options to meet specific client needs. Whether for light salvage or
large offshore lifting tasks, our Buoyancy Bags are designed to
optimize safety and operational efficiency.
Global Support and Service
Hongruntong Marine offers comprehensive support, including
technical guidance, maintenance advice, and rapid replacement. Our
global network ensures operational continuity and minimal downtime,
enhancing the reliability of our products.
FAQ
Q1: What is the maximum lifting capacity of Buoyancy Bags?
A: Capacity depends on bag size and inflation pressure, typically
ranging from 500 kg to over 10 tons. Custom options are available.
Q2: What gases are suitable for inflation?
A: Compressed air, nitrogen, and other inert gases are compatible
depending on operational requirements.
Q3: Are the bags durable in saltwater?
A: Yes, they are designed with UV and saltwater-resistant materials
to maintain integrity under prolonged marine exposure.
Q4: Can multiple bags be used together?
A: Yes, multiple bags can be linked to lift heavier loads or ensure
balanced buoyancy. Guidance is provided for optimal load
distribution.
Q5: How should I inspect the bags before use?
A: Check for punctures, seam integrity, valve operation, and correct
inflation pressure before each deployment. Follow manufacturer
guidelines for periodic maintenance.
