Hongruntong Marine LLC.
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 3150 Pcs Per Month |
| Delivery Time | 5-6 Work Days |
| Packaging Details | Wooden Pallets, Wooden Box |
| Name | Crane Load Test Water Bags |
| Thickness | 0.4mm-2.5mm, or As Request |
| Loadcell | 10-150 Tons |
| Reinforcement | Nylon Fabric |
| Material | Top Notch PVC |
| Layers | 1-6Ply, or As Request |
| Capacity | 1T - 150T |
| Color | Black, Yellow, Orange, or As Request |
| Application | Structural Load Testing, Proof Load Testing |
| Features | Durability, Adjustable Weight |
| Brand Name | Hongruntong Marine |
| Model Number | HM-CLTWB25 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 3150 Pcs Per Month |
| Delivery Time | 5-6 Work Days | Packaging Details | Wooden Pallets, Wooden Box |
| Name | Crane Load Test Water Bags | Thickness | 0.4mm-2.5mm, or As Request |
| Loadcell | 10-150 Tons | Reinforcement | Nylon Fabric |
| Material | Top Notch PVC | Layers | 1-6Ply, or As Request |
| Capacity | 1T - 150T | Color | Black, Yellow, Orange, or As Request |
| Application | Structural Load Testing, Proof Load Testing | Features | Durability, Adjustable Weight |
| Brand Name | Hongruntong Marine | Model Number | HM-CLTWB25 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS | Place of Origin | China |
| High Light | high capacity water weight bags ，leak proof crane test bags ，lightweight durable water bags | ||
Water Weight Bags High Capacity Leak Proof Rapid Filling Lightweight Durable
Description
Crane Load Test Water Bags are engineered flexible load testing devices designed for proof-load testing of cranes, davits, winches, and lifting structures in marine and industrial environments. Manufactured from high-strength PVC-coated woven fabric with reinforced seams, these water bags provide a safe, controllable alternative to traditional solid test weights.
Typical capacities range from 1 ton to over 100 tons depending on project requirements. The lightweight empty structure allows easy transportation and deployment, while the filling system enables gradual loading for precise calibration. UV resistance, abrasion protection, and excellent tensile strength ensure reliable performance even in harsh offshore or shipyard conditions.
These water bags significantly reduce logistics costs, enhance operational safety, and simplify load test procedures for shipyards, ports, offshore platforms, and heavy industry facilities.
Case Study – Offshore Supply Vessel Crane Test
A Southeast Asian offshore service company required annual certification of a 50-ton deck crane installed on an offshore supply vessel. Transporting solid test weights offshore was costly and logistically complex.
Hongruntong Marine supplied modular water load bags with calibrated flow meters. The bags were filled directly using seawater, allowing controlled incremental loading. The entire test was completed within one day, reducing downtime by 40%.
Operators reported excellent handling, stable load behavior, and easy draining. The system has since become their standard annual testing solution.
Specifications
| Name | Crane Load Test Water Bags |
| Application | Proof Load Testing, Offshore Load Testing, Structural Load Testing, Ship Load Testing, Industrial Equipment Testing, Research and Development. |
| Content | 100% POLYVINYL CHLORIDE |
| Phthalate | 7P Phthalate Free (includes all Phthalates listed in CAL Prop 65, CPSIA and REACH) |
| Backing Material Size | 1.8/2.0 Mm X 1.55m, Thickness Produced as Per Your Request. |
| Weight | 37.1 oz square yard/ 1450 +- 50 GSM |
| Special | UV Resistant |
| 7P Phthalate Free (includes all Phthalates listed in CAL Prop 65, CPSIA and REACH) | |
| BPA Free / Tris Free / Formaldehyde Free | |
| Does Not Contain Conflict Minerals | |
| Care Instructions | Rinse with Fresh Water and Air Dry |
| Do Not Store with Seawater and Keep Away From Heat Sources | |
| Available sizes | 5000 kg |
| 8,000 kg | |
| 1,0000 kg | |
| 15,000 kg | |
| 20,000 kg | |
| 30,000 kg | |
| 50,000 kg | |
| 100,000 kg | |
| Special Sizes Could be Customized | |
| OEM | Supported |
| MODEL | Weight | Volume | Empty Height (Length) |
Filled Height (Length) |
Max Diam (ø) |
Dry Weight without accessories |
| kg | Liters / m3 | m | m | m | kg | |
| lbs | USG | ft | ft | ft | lbs | |
| HM-1T | 1,000 | 1,000 / 1 | 2.52 | 2.23 | 1.39 | 36 |
| 2,204 | 264 | 8.27 | 7.33 | 4.56 | 80 | |
| HM-2T | 2,000 | 2,000 / 2 | 2.87 | 2.6 | 1.65 | 41 |
| 4,409 | 528 | 9.41 | 8.5 | 5.43 | 90 | |
| HM-3T | 3,000 | 3,000 / 3 | 3.38 | 2.97 | 1.82 | 50 |
| 6,613 | 792 | 11.11 | 9.75 | 6.0 | 110 | |
| HM-4T | 4,000 | 4,000 / 4 | 3.41 | 3.07 | 1.88 | 64 |
| 8,818 | 1,056 | 11.22 | 10.1 | 6.16 | 141 | |
| HM-5T | 5,000 | 5,000 / 5 | 4.14 | 3.52 | 2.13 | 80 |
| 11,023 | 1,320 | 13.60 | 11.58 | 7.0 | 176 | |
| HM-6T | 6,000 | 6,000 / 6 | 4.39 | 3.91 | 2.28 | 86 |
| 13,227 | 1,585 | 14.41 | 12.83 | 7.48 | 189 | |
| HM-8T | 8,000 | 8,000 / 8 | 4.54 | 3.93 | 2.52 | 104 |
| 17,636 | 2,113 | 14.91 | 12.91 | 8.27 | 230 | |
| HM-10T | 10,000 | 10,000 / 10 | 5.18 | 4.49 | 2.70 | 130 |
| 22,046 | 2,641 | 17.0 | 14.75 | 8.90 | 286 | |
| HM-12.5T | 12,500 | 12,500/ 12.5 | 5.43 | 4.62 | 2.86 | 154 |
| 27,558 | 3,302 | 17.91 | 15.16 | 9.39 | 340 | |
| HM-15T | 15,000 | 15,000 / 15 | 6.24 | 5.48 | 2.95 | 159 |
| 33,069 | 3,962 | 20.50 | 18.00 | 9.70 | 350 | |
| HM-20T | 20,000 | 20,000 / 20 | 6.78 | 6. 04 | 3.42 | 224 |
| 44,100 | 5,283 | 22.25 | 19.83 | 11.25 | 492 | |
| HM-25T | 25,000 | 25,000 / 25 | 7.51 | 6.40 | 3.75 | 315 |
| 55,115 | 6,604 | 24.66 | 21.0 | 12.33 | 695 | |
| HM-35T | 35,000 | 35,000 / 35 | 8.07 | 7.11 | 3.91 | 417 |
| 77,161 | 9,246 | 26.50 | 23.33 | 12.83 | 920 | |
| HM-40T | 40,000 | 40,000 / 40 | 8.71 | 7.72 | 4.07 | 440 |
| 88,184 | 10,566 | 28.58 | 25.33 | 13.36 | 970 | |
| HM-50T | 50,000 | 50,000 / 50 | 8.99 | 7.77 | 4.56 | 544 |
| 110,231 | 13,208 | 29.50 | 25.50 | 14.96 | 1200 | |
| HM-100T | 100,000 | 100,000 / 100 | 11.27 | 10.00 | 5.65 | 952 |
| 220,462 | 26,420 | 37.00 | 32.9 | 18.56 | 2100 |
Features
High Strength Structural Fabric
The load bags are produced from industrial-grade polyester base fabric coated with marine-grade PVC elastomer. This construction ensures exceptional tear resistance, minimal elongation under load, and strong fatigue durability. Reinforced webbing belts distribute stresses evenly, preventing localized overstress during lifting operations.
Controlled Progressive Loading Capability
Unlike solid weights, water load bags enable gradual load increase. Integrated filling valves, calibrated flow meters, and pressure relief systems allow operators to precisely control load increments. This improves testing accuracy while significantly reducing sudden shock loading risks.
Abrasion and Environmental Resistance
The outer layer incorporates UV inhibitors and abrasion-resistant coating. The bags maintain flexibility in low temperatures and resist degradation from saltwater, oils, and sunlight exposure. This extends operational lifespan even in offshore environments.
Operational Convenience and Storage Efficiency
Empty bags are foldable and lightweight. They require minimal storage space and can be transported easily to remote offshore sites. Quick-connect hoses and standardized shackles simplify installation.
Applications
Shipyard Crane Certification
Water load bags are widely used for commissioning tests of gantry cranes, jib cranes, and floating cranes during ship construction or repair.
Offshore Platform Maintenance
They enable periodic proof load testing of platform cranes without requiring heavy transport vessels for solid weights.
Port Equipment Verification
Harbor authorities use them for scheduled inspection of quay cranes, davits, and lifting beams to meet regulatory compliance.
Why Choose Hongruntong Marine
Extensive Marine Engineering Experience
Hongruntong Marine has years of specialization in marine lifting test equipment. Our engineering team understands offshore safety standards and operational challenges, ensuring reliable solutions.
Strict Quality Manufacturing System
All water bags are produced under controlled quality systems using certified raw materials. Every bag undergoes pressure testing, dimensional inspection, and load verification prior to shipment.
Custom Engineering Capability
We provide tailored capacities, connection designs, manifold systems, and instrumentation packages to suit specific crane configurations.
Responsive Technical Support
From installation guidance to maintenance advice, our global service team offers fast response and continuous technical assistance.
FAQ
1. What capacity ranges are available?
Standard bags range from 1T to 100T, with custom designs exceeding this range.
2. Can seawater be used for filling?
Yes. The material is corrosion resistant and suitable for seawater applications.
3. Are the bags reusable?
Yes. With proper handling and storage, they can be used for many test cycles.
4. Do you provide certification?
Yes, proof test certificates and material traceability documentation are supplied.
5. How are the bags transported?
They are folded compactly and shipped in protective packaging.
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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