Hongruntong Marine LLC.
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Underwater Lift Bags Lightweight Buoyancy Bag for Subsea Construction Projects
Description
Underwater lift bags are essential buoyancy devices designed for lifting, recovering, and transporting submerged objects in marine environments. Manufactured using heavy duty, coated nylon or PVC, these bags provide controlled and efficient buoyancy for operations such as salvage, underwater construction, offshore maintenance, and military recovery. Our lift bags come in various designs, including open bottom, enclosed, and pillow-type bags, catering to different lifting requirements. Equipped with reinforced load bearing straps, stainless steel hardware, and automatic overpressure relief valves, they ensure safe and stable ascent. With over 30 years of manufacturing expertise, we produce high-quality, durable, and internationally certified lift bags that perform reliably in harsh underwater conditions.
Specifications
| Product Name | Underwater Lift 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
Wide Range of Buoyancy Capacities
Available in various sizes, from 50 kg to over 50,000 kg, our lift bags cater to small-scale recovery tasks and large offshore lifting projects, offering versatility for different applications.
Lightweight, Compact, and Easy to Transport
Our lift bags are foldable and lightweight, allowing for easy transportation, storage, and rapid deployment, making them ideal for emergency salvage and professional diving operations.
Certified and Industry Compliant
Our products meet or exceed IMCA, ABS, Lloyd’s Register, and DNV standards, ensuring reliable performance and compliance with global marine industry safety regulations.
Versatile Applications Across Industries
Ideal for marine salvage, offshore construction, shipwreck recovery, pipeline installation, and military operations, our lift bags are trusted by professional divers, salvage experts, and offshore engineers worldwide.
Applications
● Underwater cable deployment
● Oil and gas equipment recovery
● Military underwater recovery missions
● Harbor and dock maintenance
● Bridge construction support
● Subsea construction projects
Advantages
Over 30 Years of Manufacturing Expertise
With three decades of experience, we have developed industry-leading technology and production capabilities, ensuring high-quality and reliable lift bags.
High Quality, Durable Materials
Our lift bags are made from heavy-duty, coated nylon or PVC, offering superior resistance to abrasion, UV exposure, and saltwater corrosion for long-lasting performance.
Advanced Safety Features
Equipped with automatic overpressure relief valves, our lift bags prevent overinflation, ensuring safe and controlled lifting operations in any underwater environment.
Wide Range of Buoyancy Capacities
We manufacture lift bags with capacities ranging from 50 kg to over 50,000 kg, making them suitable for various underwater applications, from small scale recovery to large industrial lifting.
FAQ
1. What are the key advantages of your lift bags?
Our lift bags feature high-strength materials, reinforced straps, overpressure relief valves, and compliance with global safety standards.
2. What sizes and buoyancy capacities do you offer?
We offer lift bags ranging from 50 kg to over 50,000 kg of buoyancy capacity.
3. What materials are used in your lift bags?
Our lift bags are made from heavy duty, coated nylon or PVC, ensuring abrasion, UV, and saltwater resistance.
4. Are your lift bags resistant to saltwater and UV exposure?
Yes, they are designed to withstand harsh marine environments for long-term durability.