ECONAD Water Weight Test Bags are flexible load-testing systems designed for the proof testing and verification of cranes, lifting equipment, davits, platforms and other load-bearing structures.
Instead of using solid test weights, the bags are filled with water to gradually create the required test load. This provides a practical and controllable solution for load testing on vessels, at ports, shipyards, industrial facilities and construction sites.
Load Testing with Water
Water weight testing provides a convenient alternative to transporting and handling large quantities of solid test weights.
The empty bag is lightweight and compact during transportation. Once positioned and connected to the lifting equipment, it is gradually filled with water until the required test load is reached.
After testing, the water can be discharged and the bag folded for transportation or storage.
This significantly simplifies the logistics of testing heavy lifting equipment.
ECONAD Water Weight Test Bags can be used for:
- Crane load testing
- Proof load testing of lifting equipment
- Ship and offshore crane testing
- Davit testing
- Hoist and winch testing
- Load testing of lifting structures
- Testing of platforms and supporting structures
- Marine and shipyard operations
- Port and terminal equipment
- Industrial lifting equipment
- Periodic inspection and certification procedures
The bags are particularly suitable for applications where transporting conventional solid test weights would be difficult or expensive.
The bags are manufactured from high-strength PVC-coated fabric with a density of 900 g/m².
The heavy-duty material is selected to provide durability and resistance to the mechanical stresses associated with repeated filling, lifting and discharge operations.
The lifting arrangement incorporates 60 mm wide reinforced slings positioned around the bag.
Depending on the model, the number of lifting slings varies to distribute the load safely across the structure.
The lifting elements are connected through reinforced fittings designed to transfer the water load to the lifting point.
One of the main advantages of water weight testing is the ability to increase the applied load progressively.
Water is added gradually until the required test weight is achieved, allowing the operator to monitor the lifting equipment during the complete loading process.
This provides greater control than applying a full solid test load at once.
When empty, water weight bags occupy significantly less space and weigh much less than equivalent solid test weights.
This provides important logistical advantages:
- Reduced transportation requirements
- Easier storage
- Simplified handling
- Rapid deployment on site
- Lower mobilisation requirements
- Convenient use on vessels and offshore facilities
Water required for the test can normally be sourced directly at or near the operating location.
Selected ECONAD Water Weight Test Bags are also available for rent, providing a practical solution for temporary testing operations and one-time projects.
Rental can be particularly useful for:
- Periodic crane certification
- Shipyard maintenance
- Temporary offshore projects
- Commissioning of new lifting equipment
- One-time proof-load testing
- Progressive Load Testing: The required test load can be increased gradually by filling the bag with water.
- Reduced Transportation Requirements: Empty bags are significantly easier to transport than equivalent solid test weights.
- Compact Storage: Flexible construction allows the bags to be folded when not in use.
- Durable Construction: High-density PVC-coated fabric provides reliable performance during repeated load-testing operations.
- Multiple Capacities: Different bag sizes allow the testing system to be adapted to the required load.
- Marine and Industrial Applications: Suitable for vessels, shipyards, ports, offshore facilities and industrial lifting equipment.
- Rental Availability: Water weight bags can be rented for temporary testing projects.
Water Weight Load Testing Solutions
ECONAD supplies water weight test bags for crane testing, lifting-equipment certification and industrial load-testing applications.
Contact us for:
- Selection of the appropriate test bag
- Calculation of the required test load
- Multi-bag testing configurations
- Custom capacities and dimensions
- Technical consultation
- Rental availability
- Commercial quotation
Send us information about the equipment to be tested, required test load and operating location to receive a suitable water weight testing configuration.
| Type | WB 1T | WB 2T | WB 3T |
| Capacity | 2t | 3t | 5t |
| Diameter, m | 1 | 1.2 | 2 |
| Height, m | 1 | 2.5 | 3.5 |
| Tissue density, g/m2 | 900 | ||
| Number of lines | 4 | 6 | 8 |
