Proof Load Bags

DOOWIN offer 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 bags. Proof load bags are the simple proof load testing method instead of traditional solid crane test weights. Water bags can be used for the proof load testing for the lifting equipment and structures. When request load test weights after it’s newly finished, or periodic check or maintenance. For the reason that, this water-filled proof load bags offer one kind innovative water load test weight solution with the advantages of Safety, Economy, Convenience, High Efficiency.

proof load bags
proof load bags
low-headroom-proof-load-bags in use

Specification and Advantages

Water filled proof load bags is one system including water filled bags body and all its accessories.
Moreover, these proof load bags have a separated lifting set from the water weight bags body.
As a result, the failure of any one webbing element will not result in failure of the lifting set nor cause a local overload of the weight bags.


Top Quality
Masterlink & Shackles

 Top quality master link and shackles Made in China, EN 1677 or EN 13889. Crosby and Greenpin are available.


Double Ply 7:1 Eye-Eye Webbing Sling

Comply with EN1492-2:2000 and EN1492-1:2000. Provide Certificate of Conformity.


High Pressure Filling
& Drain Water Hoses

High-quality PVC and TPU high-pressure hose with valves and camlocks.


Repair Material
Complete Accessories

Equipped all fittings. Ready for use. Include repair material free of charge. Special design inspection plug.

Specification of Low Headroom Proof Load Bags.

DOOWIN standard low headroom proof load bags are from 1ton to 15ton. The below specification is a common size.

We also can design and make other size and capacity for your project.


Customized Low Headroom Proof Load Bags.

This is one kind special designed low headroom water filled proof load bags. This water weight bags can be used horizontally. It has a very low height with a long width. Have to use it together with the lifting beam. The standard is size is 50ton.


Type Certificated by Drop Test
Comply with LEEA 051

Our low headroom proof load bags are designed manufactured, tested,
and certificated in 100% compliance with LEEA 051 guidelines.

Highest Quality Proof Load Bags

DOOWIN proof load bags are manufactured with the highest quality PVC coating fabric material SGS certificated. Our proof load bags are manufactured and tested comply with the LEEA 051 Guidance. In addition, we can provide BV, ABS, LR third-party certificate upon request. Visit About Us to get more information.

proof load bags certificate

Certificate of Type Test

6:1 safety factor type verified by drop test at UK NEL TUV. Meet the industry highest standard.

proof load bags certificate

BV Inspection Certificate

BV, ABS, LR third Party Certificate comply with LEEA 051. Ensure the quality of your every order.

proof load bags BV certificate

SGS Material Certificate

Made of 1900g high strength UV resistant PVC coated fabrics. Tensile strength reach 10,000N/5cm.


Our Clients

Modec logo

Excellent quality water weight bags and reliable service, they deliver exactly what they agree to and perfectly on time.

Stephen Barnett, MODEC (Singapore)
China harbor logo

Awesome to use DOOWIN buoyancy bags for our Aramco project. Its quality completely can be comparable with UK products.

Dr.Chen Haijun, China Harbour (Aramcot)
Mcdermott logo

We have confidence with DOOWIN. They can help us with an innovative solution, well prepared to accommodate to our request.

Hugo Silva (Project Manager), McDERMOTT
water weight bags clients

What capacity proof load bags do you need?
What’s the height of your low headroom crane?

Please contact our professional team!

Mobile: +86-185 5486 9267 (WhatsApp)
Welcome you visit our Alibaba Showroom

Contact us now!