Load Testing Water Bags are a professional, flexible load testing solution designed for proof load testing of lifting equipment, marine structures, and offshore installations. By using water as a variable and controllable load medium, these bags provide an accurate, safe, and cost-effective alternative to traditional solid weights such as steel blocks or concrete ballast.
Manufactured from heavy-duty, high-tensile technical fabrics, the water bags are engineered to withstand high internal pressure while maintaining dimensional stability under load. Reinforced seams, multiple lifting attachment points, and controlled filling and draining systems ensure both operational safety and precision during load testing procedures.
At a large coastal shipyard specializing in the construction and maintenance of medium-sized cargo vessels, a client was required to perform proof load testing on newly installed quay cranes with a rated lifting capacity of 150 tonnes. The project faced several constraints: limited storage space for traditional steel test weights, tight testing schedules, and strict safety supervision by a classification society.
Hongruntong Marine supplied a set of modular Load Testing Water Bags with a combined maximum capacity exceeding the required proof load. The bags were delivered empty and transported directly to the quayside using standard forklifts. On-site, the bags were connected using certified shackles and gradually filled with seawater through a controlled filling system.
The client reported a significant reduction in testing time and logistical costs compared with previous projects using steel weights. Safety officers highlighted the improved risk profile, as manual handling and suspended solid masses were minimized.
| Name | Load Testing 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 Features | UV Resistant, 7P Phthalate Free, 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, 10,000 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 |
|---|---|---|---|---|---|---|
| HM-1T | 1,000 kg / 2,204 lbs | 1,000 L / 1 m³ / 264 USG | 2.52 m / 8.27 ft | 2.23 m / 7.33 ft | 1.39 m / 4.56 ft | 36 kg / 80 lbs |
| HM-2T | 2,000 kg / 4,409 lbs | 2,000 L / 2 m³ / 528 USG | 2.87 m / 9.41 ft | 2.6 m / 8.5 ft | 1.65 m / 5.43 ft | 41 kg / 90 lbs |
| HM-3T | 3,000 kg / 6,613 lbs | 3,000 L / 3 m³ / 792 USG | 3.38 m / 11.11 ft | 2.97 m / 9.75 ft | 1.82 m / 6.0 ft | 50 kg / 110 lbs |
| HM-4T | 4,000 kg / 8,818 lbs | 4,000 L / 4 m³ / 1,056 USG | 3.41 m / 11.22 ft | 3.07 m / 10.1 ft | 1.88 m / 6.16 ft | 64 kg / 141 lbs |
| HM-5T | 5,000 kg / 11,023 lbs | 5,000 L / 5 m³ / 1,320 USG | 4.14 m / 13.60 ft | 3.52 m / 11.58 ft | 2.13 m / 7.0 ft | 80 kg / 176 lbs |
| HM-6T | 6,000 kg / 13,227 lbs | 6,000 L / 6 m³ / 1,585 USG | 4.39 m / 14.41 ft | 3.91 m / 12.83 ft | 2.28 m / 7.48 ft | 86 kg / 189 lbs |
| HM-8T | 8,000 kg / 17,636 lbs | 8,000 L / 8 m³ / 2,113 USG | 4.54 m / 14.91 ft | 3.93 m / 12.91 ft | 2.52 m / 8.27 ft | 104 kg / 230 lbs |
| HM-10T | 10,000 kg / 22,046 lbs | 10,000 L / 10 m³ / 2,641 USG | 5.18 m / 17.0 ft | 4.49 m / 14.75 ft | 2.70 m / 8.90 ft | 130 kg / 286 lbs |
| HM-12.5T | 12,500 kg / 27,558 lbs | 12,500 L / 12.5 m³ / 3,302 USG | 5.43 m / 17.91 ft | 4.62 m / 15.16 ft | 2.86 m / 9.39 ft | 154 kg / 340 lbs |
| HM-15T | 15,000 kg / 33,069 lbs | 15,000 L / 15 m³ / 3,962 USG | 6.24 m / 20.50 ft | 5.48 m / 18.00 ft | 2.95 m / 9.70 ft | 159 kg / 350 lbs |
| HM-20T | 20,000 kg / 44,100 lbs | 20,000 L / 20 m³ / 5,283 USG | 6.78 m / 22.25 ft | 6.04 m / 19.83 ft | 3.42 m / 11.25 ft | 224 kg / 492 lbs |
| HM-25T | 25,000 kg / 55,115 lbs | 25,000 L / 25 m³ / 6,604 USG | 7.51 m / 24.66 ft | 6.40 m / 21.0 ft | 3.75 m / 12.33 ft | 315 kg / 695 lbs |
| HM-35T | 35,000 kg / 77,161 lbs | 35,000 L / 35 m³ / 9,246 USG | 8.07 m / 26.50 ft | 7.11 m / 23.33 ft | 3.91 m / 12.83 ft | 417 kg / 920 lbs |
| HM-40T | 40,000 kg / 88,184 lbs | 40,000 L / 40 m³ / 10,566 USG | 8.71 m / 28.58 ft | 7.72 m / 25.33 ft | 4.07 m / 13.36 ft | 440 kg / 970 lbs |
| HM-50T | 50,000 kg / 110,231 lbs | 50,000 L / 50 m³ / 13,208 USG | 8.99 m / 29.50 ft | 7.77 m / 25.50 ft | 4.56 m / 14.96 ft | 544 kg / 1200 lbs |
| HM-100T | 100,000 kg / 220,462 lbs | 100,000 L / 100 m³ / 26,420 USG | 11.27 m / 37.00 ft | 10.00 m / 32.9 ft | 5.65 m / 18.56 ft | 952 kg / 2100 lbs |
Load Testing Water Bags are engineered to handle high proof loads while maintaining excellent structural stability throughout the testing process. The internal load distribution is carefully designed so that hydrostatic pressure is evenly transferred across the bag surface, reducing localized stress concentrations.
The outer shell of the water bags is manufactured from heavy-duty coated technical fabric with high tensile strength and superior abrasion resistance. This material selection enables the bags to withstand repeated contact with steel decks, concrete surfaces, and marine environments without degradation.
One of the core advantages of Load Testing Water Bags is the ability to control the applied load with high precision. By adjusting the water volume, operators can increase or decrease load values in small increments, enabling compliance with proof load testing procedures that require staged loading.
Safety is a fundamental design principle of Load Testing Water Bags. Each bag incorporates multiple reinforced lifting points to provide redundancy during suspension. Seam construction is optimized through high-frequency welding or reinforced stitching to ensure leak resistance under pressure.
In shipyards, Load Testing Water Bags are extensively used for proof load testing of overhead cranes, gantry cranes, jib cranes, and auxiliary lifting appliances. Their compact transport form and on-site filling capability make them ideal for confined dock areas where storing heavy steel weights is impractical.
For offshore platforms, port facilities, and marine terminals, Load Testing Water Bags provide a practical solution for verifying the load capacity of davits, winches, gangways, and structural lifting points. Their resistance to seawater exposure and harsh weather conditions ensures reliable performance in offshore environments.
Beyond marine applications, these water bags are used in construction projects for proof load testing of bridges, walkways, and temporary structures. By applying controlled loads without permanent ballast installation, engineers can validate structural performance while maintaining site flexibility.
Hongruntong Marine has extensive experience in supplying load testing equipment to shipyards, ports, and offshore operators worldwide. Our technical team understands the regulatory and operational requirements of marine and industrial load testing.
We recognize that load testing requirements vary significantly depending on equipment type, test load, and operating environment. Hongruntong Marine offers customized water bag configurations, including tailored load capacities, attachment layouts, and connection systems.
Quality control is central to our manufacturing process. All Load Testing Water Bags are produced using carefully selected materials and undergo rigorous inspection before delivery. Seam integrity, lifting point strength, and dimensional accuracy are verified to ensure consistent performance.
Hongruntong Marine provides detailed user manuals, maintenance guidelines, and technical data sheets to support safe and effective use of our products. Our after-sales service team is available to address operational questions, replacement requirements, or future project needs.
Load Testing Water Bags are available in a wide range of capacities, from small units designed for low-tonnage equipment to large modular systems capable of achieving very high proof loads. Multiple bags can be combined to reach the required test load while maintaining flexibility in configuration.
Yes, the water bags are specifically designed for repeated use. With proper handling, inspection, and storage, they can be used across multiple projects without loss of performance. Regular visual checks and adherence to maintenance guidelines are recommended to maximize service life.
The materials used in Load Testing Water Bags are resistant to seawater, UV exposure, and weathering, making them suitable for offshore and coastal applications. Proper rinsing and drying after use in marine environments further enhances durability.
Load accuracy is achieved by controlling the volume of water introduced into the bag. Using calibrated flow meters or volume measurement systems allows operators to calculate the applied load precisely, ensuring compliance with proof load testing requirements.
Operators should ensure that all lifting connections are correctly installed, filling is performed gradually, and exclusion zones are maintained during testing. Following the provided operating instructions and applicable safety standards is essential for safe and successful load testing.
