Water Weight Bags – Underwater Lift Bags

DOOWIN provide the below main products to service the load testing, underwater diving,
marine salvage, offshore pipeline, water storage, fire fighting, marine and oil industries.


Underwater Lift Bags

Professionally designed marine salvage bags
Manufactured Comply with IMCA D016
Air Lifting Capacity: 50kg ~ 50ton.
Customized size and shape are available.


Water Weight Bags

Used for the proof load testing for crane, hoist,
offshore rig, lifting equipment, platform.
Standard capacity: 650kg, 13000kg.
Customized size and shape are available.


Pipeline Buoyancy Units

Various pipeline laying floats.
Easier to transport and operation
Standard buoyancy capacity: 250kg~50ton
Customized size and shapes are available.


Lifeboat Test Water Bags

Professinal designed water bags
with air valve, relief valves and hands
Standard Capacity: 100kg ~ 1ton
Customised size availiable


Portable Water Tanks

Various water bladder tanks used for potable water,
grey water, rainwater, agricultural irrigation.
Made of PVC and TPU coating fabric for water and oil.
Customized size and shapes are available.


Featured Inflatable Bags

Based on our experienced production technology
for the inflatable PVC flexible products. We also
make the fenders and buoys, plugs, ship launching
airbags, and flexitanks to help the customer more.

Who We Are?

DOOWIN is Chinese leading professional manufacturer underwater lift bags and water weights bags. We also produce pipeline buoyancy units, water bladder tanks, and other special inflatable flexitank products. We manufacture and test the air lift bags and water weight bags in complying with international standard IMCA D016 and LEEA 051.

View Our Details
Projects Achievement

Leading Manufacturer

Our experienced skillful engineer and the quality controller can guarantee the product at good quality and competitive price within the short lead time.

Your Trusted Partner

Your Safety is Our Mission! This has always been our guiding principle in our actions. We focus on all the details. Continuous upgrades and improvements.

The Best Solution Provider

Our experienced engineers are ready to provide you with pre-sales post-sales technical support. On-site guidance services are also available.

Our Clients

Modec logo

Excellent quality water 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
doowin clients

How can we help you?

If you want any more information about all things DOOWIN related,
please get in contact with us and we will be sure to attend to your request as soon as possible.

Mobile: +86-18554869267  | Sales@doowincn.com