HONGRUNTONG Load Bags Quick Fill Highly Portable Safe Durable Reusable

Water Weight Bags function as controlled-load testing instruments designed to validate the mechanical integrity and safe working load of cranes, davits, hoists, and structural platforms. Constructed using industrial-grade coated textiles and reinforced load-bearing hardware, these bags are engineered to provide highly accurate, gradually adjustable loading during proof tests.

Their technical appeal lies in precise filling control, which facilitates stepwise proof loading, enabling the detection of nonlinear structural responses before reaching full rated load. This staged approach improves test safety by eliminating sudden load application that may occur with solid weights.

From material selection to welding techniques, Water Weight Bags are optimized for marine, offshore, and industrial environments. High-strength composite fabrics provide tear resistance, puncture resistance, and stability under hydrostatic pressure.

In 2022, a large ship-repair facility in Greece faced a demanding schedule involving the acceptance testing of multiple 60-ton shipboard cranes installed on a fleet of bulk carriers undergoing retrofit. Hongruntong Marine supplied a set of custom-engineered high-capacity Water Weight Bags with load distribution beams designed specifically for the shipyard's crane hook arrangement.

During the first test, the team deployed six 10-ton bags and filled them simultaneously using manifold-controlled water supply. At approximately 70% loading, a subtle irregularity in boom tilt was observed. Thanks to the safe and controlled load environment, repairs were performed without needing to remove or relocate the bags.

After repair, tests resumed, and the crane successfully achieved full proof load. Over the fleet-wide retrofit operation, the shipyard reported a reduction of total test hours by more than 40% and significantly improved occupational safety.

• High Capacity Load Efficiency with Reduced Structural Footprint: Engineered to generate substantial loading capacity without imposing the rigid footprint associated with steel weights.
• Precision Fill and Drain Management System: Integrated system includes oversized ports, multi-stage valves, and optional quick-connect couplings for finely adjustable loading.
• Ruggedized Outer Architecture with Engineering Grade Coatings: Formulated to resist chemicals, hydraulic oils, abrasions, and UV degradation.
• Interchangeable Rigging Interfaces for Multi Configuration Testing: Modular rigging interfaces allow operators to switch between various load-test configurations.

• Load Testing for Container-Handling Equipment
• Testing of Shipboard Rescue and Handling Systems
• Load Verification for Large-Scale Industrial Installations

• Industry Leading Fabrication Quality with Marine-Grade Standards
• Tailor Made Engineering Designs for Specialized Operations
• End to End Technical Support and Long Term Maintenance Programs
• International Logistics Network and Fast Response Capability