Hongruntong Marine LLC.
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram |
| Material | TOP-Grade PVC Coating Fabric |
| Feature | Durable and reliable construction |
| Lifting Capacity | 200kg to 50 tons |
| OEM | Warmly Welcomed |
| Packaging Details | Wooden Pallets, Wooden Box |
| Thickness | 0.4mm-2.5mm, or As Request |
| Reinforcement | Nylon Fabric |
| Delivery Time | 5-8 Work Days |
| Packaging | Pallets, Wooden Box |
| Standard | IMCA-D-016 |
| Layers | 1-6Ply, or As Request |
| Application | Salvage operations, Underwater construction |
| Color | Black, Yellow, Orange, or As Request |
| Type | Cylindrical, Parachute, Pillow |
| Usage | Underwater air lifting, Salvage, Large buoyancy |
| Supply Ability | 1580 Pcs Per Month |
| Certificate | BV, ABS, DNV, LR, SGS, CCS |
| Warranty | 36 Months |
| Valve | Inflation and Pressure release |
| Brand Name | Hongruntong Marine |
| Model Number | HM-AL12 |
| Place of Origin | China |
| Certification | BV, ABS, DNV, LR, SGS, CCS, RMRS |
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Product Specification
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram | Material | TOP-Grade PVC Coating Fabric |
| Feature | Durable and reliable construction | Lifting Capacity | 200kg to 50 tons |
| OEM | Warmly Welcomed | Packaging Details | Wooden Pallets, Wooden Box |
| Thickness | 0.4mm-2.5mm, or As Request | Reinforcement | Nylon Fabric |
| Delivery Time | 5-8 Work Days | Packaging | Pallets, Wooden Box |
| Standard | IMCA-D-016 | Layers | 1-6Ply, or As Request |
| Application | Salvage operations, Underwater construction | Color | Black, Yellow, Orange, or As Request |
| Type | Cylindrical, Parachute, Pillow | Usage | Underwater air lifting, Salvage, Large buoyancy |
| Supply Ability | 1580 Pcs Per Month | Certificate | BV, ABS, DNV, LR, SGS, CCS |
| Warranty | 36 Months | Valve | Inflation and Pressure release |
| Brand Name | Hongruntong Marine | Model Number | HM-AL12 |
| Place of Origin | China | Certification | BV, ABS, DNV, LR, SGS, CCS, RMRS |
| High Light | Quick Dump Valve Underwater Air Lift Bags ，Heavy Load Capacity Pillow Underwater Air Lift Bags ，Corrosion Resistant Marine Air Lift Bags | ||
Pillow Underwater Air Lift Bags are flexible buoyancy systems engineered for underwater lifting, temporary flotation, subsea positioning, marine maintenance and controlled handling of submerged structures and equipment. Their pillow-shaped configuration combines a large effective buoyancy volume with a low-profile installation form, making them suitable for operations where underwater clearance is limited and rigid lifting equipment cannot be positioned efficiently.
An offshore engineering contractor in the Arabian Gulf successfully used multiple Pillow Underwater Air Lift Bags to install a 420-ton steel support frame in shallow offshore construction zone. The distributed buoyancy arrangement allowed precise control over the frame's irregular geometry and uneven center of gravity.
The operation demonstrated the practical benefit of using multiple independently controlled buoyancy units, allowing the installation team to manage the vertical response of separate sections and compensate for uneven load distribution. The bags were progressively inflated while monitoring the frame's inclination and vertical movement, providing flexible control in restricted water depth.
| Product Name | Underwater Air Lifting Bag |
|---|---|
| Raw Material | TOP-Grade PVC Coating Fabric |
| Type | Pillow |
| 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 |
| Accessories | Valve, Inflatable Tube, Repair Material |
| Warranty | 3 Years |
| Model | Capacity (kg) | Capacity (lbs) | Length (mm) | Width (mm) |
|---|---|---|---|---|
| HM-P100 | 100 | 220 | 1,020 | 760 |
| HM-P250 | 250 | 550 | 1,320 | 820 |
| HM-P500 | 500 | 1,100 | 1,300 | 1,200 |
| HM-P1000 | 1,000 | 2,200 | 1,550 | 1,420 |
| HM-P2000 | 2,000 | 4,400 | 1,950 | 1,780 |
| HM-P3000 | 3,000 | 6,600 | 2,900 | 1,950 |
| HM-P5000 | 5,000 | 11,000 | 3,230 | 2,030 |
+/- 0.03 on densities, +/- 0.2 mm on thickness, +/- 0 to +3mm on width, +/- 0 to +3mm on length
Constructed from reinforced PVC-coated polyester fabric selected for tensile strength, flexibility, and repeated operational handling. The composite construction withstands internal inflation pressure, external hydrostatic pressure, handling loads, and normal marine exposure.
Airtight chambers depend on integrity of welded seams connecting fabric panels. Consistent welding parameters and controlled fabrication processes ensure structural reliability, with particular attention to transitions between main chamber and reinforced attachment areas.
Designed to accommodate varying operating depths and hydrostatic pressure conditions. The pillow structure allows progressive air introduction and monitoring of submerged load response through different water depths.
Multiple bags can be combined for distributed buoyancy arrangements, providing operational flexibility for larger or irregularly shaped submerged loads. Independent inflation control allows precise attitude management and progressive lifting.
Over 30 years of manufacturing experience with focus on textile reinforcement, coating performance, and operating environment requirements. Comprehensive manufacturing process covers fabric preparation, panel cutting, welding, valve integration, and final inspection.
Customized bag configurations developed according to project requirements, including dimensions, buoyancy capacity, lifting-point arrangement, and valve positioning.
Comprehensive quality control throughout fabrication process, including inspection of technical fabrics, welding areas, valve assemblies, and completed lifting systems.
International project experience with compact packaging for transportation protection and comprehensive project documentation coordination.
Usable buoyancy depends on volume of displaced water and operating conditions including water density, operating depth, internal air pressure, bag volume, rigging weight, load geometry, and required reserve buoyancy. The complete lifting arrangement must be evaluated rather than relying only on nominal volume.
Service life depends on operating frequency, inflation/deflation cycles, abrasion, ultraviolet exposure, temperature, chemical exposure, handling practices, and maintenance. Regular cleaning, drying, inspection, and proper storage help maintain fabric, seams, valves, and lifting components.
Bags can be configured for different operating environments, but actual temperature range should be confirmed before production. Ambient temperature, water temperature, solar exposure, and contact with heated equipment may influence material performance.
Inspect installation area before inflation, paying attention to sharp edges, weld projections, and abrasive surfaces. Use protective layers or suitable contact arrangements where necessary. Position bags so lifting load transfers through designed harness and reinforcement system.
Inspection and testing documentation can be arranged according to project requirements, covering dimensions, configuration, identification, airtightness testing, and manufacturing inspection records. Specific certification requirements should be confirmed before production.
Company Details
Business Type:
Manufacturer
Year Established:
1990
Total Annual:
5,256,780-5,593210
Employee Number:
220~360
Ecer Certification：
Verified Supplier
Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma... Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma...
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