Water Weight Bags provide a controlled, efficient, and safe methodology for validating lifting equipment across maritime, offshore, industrial, and construction environments. Designed with robust coated fabrics engineered to withstand hydrostatic pressure, these bags replace traditional solid weight blocks by offering significantly easier deployment and a safer testing process.
When empty, the bags are lightweight and compact, allowing rapid mobilization and reduced transport cost. Once attached to the lifting device, they are filled with water drawn directly from the site, enabling highly controlled load increments. This eliminates sudden loading surges and provides real-time monitoring of structural responses during testing.
From a technical perspective, Water Weight Bags offer uniform load distribution and precise control of test parameters. The materials used are resistant to UV exposure, abrasion, and saltwater corrosion. Reinforced lifting beams, internal baffles, and stress-diffusion panels ensure the load is evenly transferred to the lifting point.
In 2023, a Norwegian offshore maintenance contractor undertook a comprehensive load verification of a 25-ton pedestal crane on a semi-submersible drilling rig. Due to deck-space limitations and strict helicopter-lift weight rules, transporting conventional steel weights to the platform was impossible.
The testing team mobilized the deflated bags via routine supply-boat delivery, eliminating the need for heavy-lift vessels. Once on deck, the bags were assembled and connected with offshore-certified slings and a load cell. The team monitored hook load and crane deformation as filling progressed through staged increments.
| 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 | 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 |
| MODEL | Weight (kg/lbs) | Volume (Liters/m3) | Empty Height (m/ft) | Filled Height (m/ft) | Max Diam (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 |
Any non-corrosive water source is acceptable, including seawater, fresh water, or treated industrial water. Sediment-heavy water should be filtered to avoid valve blockage.
Filling time varies by hose diameter and pump capacity. A 10-ton bag typically fills within 20-40 minutes using standard ship or rig water lines.
