Water weight bags are simple and safe water filled crane test weights designed to provide proof load testing instead of traditional solid load test weights.
DOOWIN load test water weight bags are designed for proof load testing the lifting equipment and structures that request proof load weight testing. When it’s newly finished, or periodic check or maintenance. Such as crane load testing, beam load test, lifeboat davit load test, derrick load testing, overhead crane load test. So, this water-filled water weight bags offer one kind of innovative crane load test weights solution. Most noteworthy, it has the advantages of Safety, Economy, Convenience, High Efficiency.
Click the right hotspot picture to know its construction.
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Proof load test water weight bags is one crane load test weights system including proof load bags and all its accessories. Moreover, these crane load test bags are designed that the lifting set is separate from the water bag body. As a result, the failure of anyone’s webbing element will not result in the failure of the lifting set nor cause a local overload of the weight test water bags.
The below specification is a common sizes proof load bag. In addition, we also make other size and other capacity load test water bags upon request.
Model | Capacity | Max.Diameter | Filled Height | Gross Weight |
|---|---|---|---|---|
PLB-1T | 1,000 KG | |||
PLB-2T | 2,000 KG | |||
PLB-3T | 3,000 KG | |||
PLB-5T | 5,000 KG | |||
PLB-6T | 6,000 KG | |||
PLB-8T | 8,000 KG | |||
PLB-10T | 10,000 KG | |||
PLB-12.5T | 12,500 KG | |||
PLB-15T | 15,000 KG | |||
PLB-20T | 20,000 KG | |||
PLB-25T | 25,000 KG | |||
PLB-30T | 30,000 KG | |||
PLB-35T | 35,000 KG | |||
PLB-40T | 40,000 KG | |||
PLB-50T | 50,000 KG | |||
PLB-55T | 55,000 KG | |||
PLB-75T | 75,000 KG | |||
PLB-100T | 100,000 KG | |||
PLB-110T | 110,000 KG |
DOOWIN offers water-filled proof load bags used for the low headroom bridge crane load test when the testing operation has low headroom.
Low-headroom water-filled proof load bags have a short height. So, it is a very flexible proof load test way where headroom is restricted. Each lifting point only can hang one low headroom water-filled proof load bag.
We also can design and make customized size, type and capacity for your project.
Model | Capacity | Max.Diameter | Filled Height | Gross Weight |
|---|---|---|---|---|
PLB-2L | 1,000 KG | |||
PLB-3L | 2,000 KG | |||
PLB-5L | 3,000 KG | |||
PLB-10L | 5,000 KG | |||
PLB-15L | 6,000 KG | |||
PLB-25L | 8,000 KG | |||
PLB-35L | 10,000 KG | |||
PLB-50L | 12,500 KG | |||
PLB-35 | 35,000 KG | |||
PLB-55 | 55,000 KG | |||
PLB-110 | 110,000 KG |
Note: The above size and weight are only for reference. We may change its parameters according to our design.
Our waterweights bags are designed manufactured, tested, and certificated in 100% compliance with LEEA 051 guidelines.
DOOWIN load test proof load bags are manufactured with the highest quality PVC coating fabric material SGS certificated. Our crane test water bags are manufactured and tested to comply with the LEEA 051 Guidance. In addition, we can provide BV, ABS, and LR third-party certificates upon request.
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We did the drop test in TUV/NEL UK for the water weight bags 5t, 15t, 25t.
We can provide test certificates from third-party testing agencies such as CCS, BV, SGS, ABS, apave, etc.
Our raw material are tested and certficated by SGS.
Discover more load testing projects, visit doowinloadtesting.com





DOOWIN is committed to providing high quality proof-load testing water weight bags and air lifting bags for our customers worldwide.
We offer specially designed sausage-type water-filled proof load bags to do the Static and dynamic testing for the lifeboats and davits
Our load-measuring products include portable tension load links and load-measuring shackles both in wireless monitor.
We offer specially designed elongated sausage type water-filled proof load bags to test gangways.
Pillow-type water tanks can be used to verify the structural integrity of buildings, bridges, elevators, loading ramps, gangways, accommodation, ladders, and decks.
DOOWIN maintains an extensive inventory of proof-load testing equipment, such as water-weight bags, load cell/Dynamometers, wire ropes, round slings, pumps, and water hoses. Our engineers and workers are very experienced with load testing.