Hongruntong Marine LLC.
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram |
| Supply Ability | 2553 Pcs Per Month |
| Delivery Time | 5-7 Work Days |
| Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Buoyancy Bags |
| Reinforcement | Nylon Fabric |
| Feature | Durable Construction, Easy Filling and Emptying |
| Lifting Capacity | 200kg to 50 tons |
| Thickness | 0.4mm-2.5mm, or as Request |
| Valve | Inflation and Pressure Release |
| Color | Black, Yellow, Orange, or as Request |
| Material | PVC Coating Fabric |
| Application | Structural Load Testing, Proof Load Testing |
| Brand Name | Hongruntong Marine |
| Model Number | HM-BB16 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T,D/A,D/P,Western Union,MoneyGram | Supply Ability | 2553 Pcs Per Month |
| Delivery Time | 5-7 Work Days | Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Buoyancy Bags | Reinforcement | Nylon Fabric |
| Feature | Durable Construction, Easy Filling and Emptying | Lifting Capacity | 200kg to 50 tons |
| Thickness | 0.4mm-2.5mm, or as Request | Valve | Inflation and Pressure Release |
| Color | Black, Yellow, Orange, or as Request | Material | PVC Coating Fabric |
| Application | Structural Load Testing, Proof Load Testing | Brand Name | Hongruntong Marine |
| Model Number | HM-BB16 | Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China |
Hongruntong Marine Buoyancy Bags are industrial underwater lifting systems developed for subsea construction, marine civil engineering, offshore maintenance, and underwater recovery operations requiring stable load handling performance under complex underwater working conditions.
The product is engineered using reinforced multilayer synthetic fabric combined with high-strength internal load-support assemblies, providing controlled buoyancy output and structural stability during heavy-duty marine lifting procedures.
A large-scale bridge rehabilitation project in South America required underwater replacement of submerged steel reinforcement assemblies. The engineering contractor faced operational restrictions due to the bridge remaining active throughout the rehabilitation program.
Hongruntong Marine Buoyancy Bags were selected to support underwater lifting and stabilization operations. Commercial divers installed multiple buoyancy units around designated lifting points, allowing controlled inflation procedures that reduced structural load pressure and improved handling precision.
The buoyancy system reduced operational interruption duration and minimized the requirement for large offshore support vessels. Project supervisors reported strong abrasion resistance despite repeated contact with submerged concrete surfaces and steel reinforcement edges.
| 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, ±0.2mm on thickness, ±0 to +3mm on width, ±0 to +3mm on length |
| Model | Buoyancy (kg) | Buoyancy (lbs) | Diameter (mm) | Length (mm) | Weight (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 |
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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