Water Weight Bag with High Tensile PVC Material for Easy Filling and Draining in 1T - 150T Capacity

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.

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.

A commercial shipyard in South Korea successfully utilized Water Weight Bags for 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 required final operational verification before vessel release.

The project demonstrated the suitability of flexible water-based load systems for marine crane commissioning where working space, transportation requirements, and test-load flexibility are important considerations. The shipyard reduced solid-weight handling requirements while maintaining controlled progressive loading capabilities.

• High-Strength PVC Fabric and Reinforced Containment Structure: Constructed from high-strength PVC or reinforced PVC-coated fabric selected for water containment under suspended loading conditions with reinforced seams and load-bearing areas.
• Engineered Lifting Points and Controlled Load Transfer: Reinforced lifting points and load-bearing webbing transfer water-generated load from flexible body to crane hook with proper load distribution.
• Progressive Water Filling for Adjustable Test Loads: Allows applied load to be increased progressively for staged testing and intermediate inspections before reaching final proof load.
• Foldable Construction for Transportation and Repeated Deployment: Flexible structure allows empty product to be folded into compact configuration for easy transport and storage.

• Marine Crane Proof Load Testing: Suitable for deck cranes, cargo cranes, service cranes, and other marine lifting appliances with progressive loading capabilities.
• Davit and Vessel Lifting Equipment Verification: Ideal for davit systems, maintenance cranes, rescue equipment handling systems following installation, repair, or periodic inspection.
• Shipyard and Port Maintenance Operations: Deployable for workshop cranes, mobile harbor cranes, maintenance lifting appliances, and temporary lifting systems with easy transport between operational areas.

• More Than 30 Years of Manufacturing Experience: Extensive knowledge of material selection, reinforced fabric construction, and marine operating environments.
• Customized Design for Specific Testing Conditions: Tailored solutions for capacity, dimensions, lifting arrangements, and accessories based on equipment requirements.
• Material Control and Manufacturing Inspection: Comprehensive quality control for fabric condition, seam integrity, reinforcement areas, and overall configuration.
• Engineering Support and Project-Oriented Delivery: Technical assistance for capacity determination, installation procedures, and long-term operational efficiency.

• What capacities are available for Water Weight Bags? Available in various capacities from 5,000 kg to 100,000 kg with customizable options. Multiple bags can be combined for larger total temporary loads.
• How is the test load controlled during operation? Test load is generated by filling with controlled water quantity, allowing progressive loading stages according to approved engineering procedures.
• Can the Water Weight Bag be used repeatedly? Yes, when maintained in suitable service condition with proper inspection, drainage, cleaning, drying, and storage procedures.
• What safety requirements should be considered? Complete testing arrangement review including capacity, lifting components, and exclusion zones following approved risk assessment and testing procedures.
• Can Water Weight Bags be customized? Yes, customizable for specific dimensions, valves, lifting arrangements, capacity, and project requirements with available certification and documentation.