Crane Load Test Water Bags
Wear Resistant Flexible Fabric with Accurate Load Capacity and Quick Deployment
Water Weight Bag is a flexible temporary load testing system engineered for proof load testing, functional verification, and capacity assessment of marine cranes, deck cranes, davits, hoists, lifting appliances, and other load-bearing equipment. It uses controlled water filling to generate a predetermined testing load, providing a practical method for applications where conventional steel or concrete test weights are difficult to transport, position, store, or adjust.
Product Overview
The system is designed around the principle of converting a measured quantity of water into a controlled temporary load, allowing the testing team to establish progressive loading conditions according to the approved engineering procedure. The main body is manufactured from high-strength PVC or reinforced PVC-coated fabric selected for water containment, tensile performance, flexibility, and resistance to normal industrial handling.
Case Study: Water Weight Bag Testing for a Deck Crane
A commercial shipyard in South Korea was completing commissioning work on a newly installed deck crane fitted to a 38,000 DWT bulk carrier. The crane had a rated lifting capacity of approximately 40 tons and was scheduled for final operational verification before the vessel was released for service.
The Water Weight Bag system was selected as the temporary test load. The bags were delivered in an empty folded condition and transported to the vessel using the shipyard's normal material-handling equipment. The progressive loading procedure allowed intermediate inspections to be performed without removing and replacing heavy test weights.
Specifications
Name
Water Weight Bag
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)
Special Features
UV Resistant, 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
Technical Specifications Table
| MODEL |
Weight (kg/lbs) |
Volume (Liters/m³) |
Empty Height (m/ft) |
Filled Height (m/ft) |
Max Diameter (m/ft) |
Dry Weight (kg/lbs) |
| HM-1T |
1,000 / 2,204 |
1,000 / 1 |
2.52 / 8.27 |
2.23 / 7.33 |
1.39 / 4.56 |
36 / 80 |
| HM-2T |
2,000 / 4,409 |
2,000 / 2 |
2.87 / 9.41 |
2.6 / 8.5 |
1.65 / 5.43 |
41 / 90 |
| HM-3T |
3,000 / 6,613 |
3,000 / 3 |
3.38 / 11.11 |
2.97 / 9.75 |
1.82 / 6.0 |
50 / 110 |
| HM-4T |
4,000 / 8,818 |
4,000 / 4 |
3.41 / 11.22 |
3.07 / 10.1 |
1.88 / 6.16 |
64 / 141 |
| HM-5T |
5,000 / 11,023 |
5,000 / 5 |
4.14 / 13.60 |
3.52 / 11.58 |
2.13 / 7.0 |
80 / 176 |
| HM-6T |
6,000 / 13,227 |
6,000 / 6 |
4.39 / 14.41 |
3.91 / 12.83 |
2.28 / 7.48 |
86 / 189 |
| HM-8T |
8,000 / 17,636 |
8,000 / 8 |
4.54 / 14.91 |
3.93 / 12.91 |
2.52 / 8.27 |
104 / 230 |
| HM-10T |
10,000 / 22,046 |
10,000 / 10 |
5.18 / 17.0 |
4.49 / 14.75 |
2.70 / 8.90 |
130 / 286 |
| HM-12.5T |
12,500 / 27,558 |
12,500 / 12.5 |
5.43 / 17.91 |
4.62 / 15.16 |
2.86 / 9.39 |
154 / 340 |
| HM-15T |
15,000 / 33,069 |
15,000 / 15 |
6.24 / 20.50 |
5.48 / 18.00 |
2.95 / 9.70 |
159 / 350 |
| HM-20T |
20,000 / 44,100 |
20,000 / 20 |
6.78 / 22.25 |
6.04 / 19.83 |
3.42 / 11.25 |
224 / 492 |
| HM-25T |
25,000 / 55,115 |
25,000 / 25 |
7.51 / 24.66 |
6.40 / 21.0 |
3.75 / 12.33 |
315 / 695 |
| HM-35T |
35,000 / 77,161 |
35,000 / 35 |
8.07 / 26.50 |
7.11 / 23.33 |
3.91 / 12.83 |
417 / 920 |
| HM-40T |
40,000 / 88,184 |
40,000 / 40 |
8.71 / 28.58 |
7.72 / 25.33 |
4.07 / 13.36 |
440 / 970 |
| HM-50T |
50,000 / 110,231 |
50,000 / 50 |
8.99 / 29.50 |
7.77 / 25.50 |
4.56 / 14.96 |
544 / 1200 |
| HM-100T |
100,000 / 220,462 |
100,000 / 100 |
11.27 / 37.00 |
10.00 / 32.9 |
5.65 / 18.56 |
952 / 2100 |
Key Features
- High-Strength PVC Fabric: Constructed from reinforced PVC-coated fabric for water containment, tensile performance, and industrial handling resistance
- Engineered Lifting Points: Reinforced lifting points and load-bearing webbing for controlled load transfer and structural stability
- Progressive Water Filling: Adjustable test loads through controlled water introduction for staged testing procedures
- Foldable Construction: Compact transportation and storage when empty, enabling repeated deployment across multiple locations
Applications
- Marine Crane Proof Load Testing: Deck cranes, cargo cranes, service cranes, and marine lifting appliances
- Davit and Vessel Lifting Equipment Verification: Davit systems, maintenance cranes, and rescue equipment handling systems
- Shipyard and Port Maintenance Operations: Workshop cranes, mobile harbor cranes, and temporary lifting systems
Why Choose Hongruntong Marine
More Than 30 Years of Manufacturing Experience: Extensive knowledge in marine and industrial products, material selection, and reinforced fabric construction.
Customized Design for Specific Testing Conditions: Tailored solutions for capacity, dimensions, lifting arrangements, and operating environments.
Material Control and Manufacturing Inspection: Comprehensive quality assurance for fabric, seams, reinforcement, and lifting components.
Engineering Support and Project-Oriented Delivery: Technical assistance for installation, operation, and long-term deployment efficiency.
Frequently Asked Questions
- What capacities are available for Water Weight Bags? Various capacities from 5,000 kg to 100,000 kg with customization options for specific requirements.
- How is the test load controlled during operation? Through controlled water filling with progressive loading stages according to approved engineering procedures.
- Can the Water Weight Bag be used repeatedly? Yes, with proper inspection, cleaning, drying, and storage between operations.
- What safety requirements should be considered? Complete testing arrangement review, component suitability verification, and adherence to approved risk assessment procedures.
- Can Water Weight Bags be customized? Yes, with specific dimensions, valves, lifting arrangements, and project-specific documentation.
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