DOOWIN is Chinese unique professional manufacturer of underwater air lift bags, inflatable buoyancy bags, and water filled weight bags. Our inflatable buoyancy bags are used for the marine salvage, buoyancy support pipeline laying work. All our inflatable buoyancy bags are fully compliant with IMCA-D-016. DOOWIN water filled weight bags are manufactured and tested comply with the requirements of LEEA 051. DOOWIN equip the modern professional production machine, use the market leading material, and advanced production technology to manufacture high-quality products.
DOOWIN engineers and consultants have been in fabrication and use these products for more than 30 years, experienced in this industry. DOOWIN passed rigorous ISO 9001 Quality Management System, approved by the third party SGS, CCS, BV, ABS, LR.
DOOWIN load test water filled weight bags are manufactured with the highest quality PVC coating fabric. Our load test water filled weight bags are type certificated by drop test, which proven factor of safety in excess of 6:1. DOOWIN Water filled weight bags are manufactured and tested comply with LEEA 051 Guidance, BV, LR , ABS certificated.
Water Weight Bags
Used for the proof load testing
for crane, derricks, davit, and
any lifting or load-bearing structure
Lifting Capacity 1~100ton
Low Headroom Weight Bags
For lifting equipment & structures
when testing has low headroom
Standard lifting capacity 1~35t
Customized size available
Deck Load Test Weights
Load testing all kinds of load-bearing
structures, including bridge, platform,
walkway, floor, elevators, ramps
gangways, decks, and entire buildings.
Wireless Load Cell
It is the necessary dynamometer
the instrument for the load testing
with water filled weight bags
Standard capacity 1~300ton
Underwater Air Lift Bags
All DOOWIN underwater air lift bags are designed, manufactured and tested compliance with IMCA D016. We have various type of air lifting bags made of high-quality PVC coating fabric material with 6:1 Safety Factor.
Parachute Type Air Lift Bags
Used for lifting sunken objects and
other loads from the seabed to surface
Lifting Capacity: 50kg ~ 50t
Marine Salvage Bags
Best salvage airbags for the
marine salvage and re-floatation.
Standard Capacity: 50kg ~ 50t
Pillow Type lift Bags
Provide maximum buoyancy for the
float bag salvage in shallow water
Lift Capacity: 100kg ~ 5t
Float Bags Salvage Tube
Raise the sunken boat from deepwater
supporting docks and lift bag salvage
Buoyancy Capacity: 500kg ~ 5t
Pipeline Inflatable Buoyancy Modules
We manufacturer various inflatable buoyancy units for different pipe laying, cable float, hose floats. Our single point inflatable mono buoyancy units are drop tested with 6:1 safety factor by BV. Inflatable buoyancy bags are manufactured in compliance with IMCA D016.
Single Point Buoyancy Bags
Single point can work at large angle
Mono Buoyancy Units
Air Lift Capacity: 500kg ~ 5t
Individual Buoyancy Bags
Used for the pipe laying work
Multi lifting points, light weight
Buoyancy: 50kg ~ 50t
Twin Inflatable Cable Floats
Professional inflatable floats for the
small diameter cable, hose, pipe
Standard Capacity: 100kg ~ 2t
Marine Rubber Airbags
Heavy duty salvage rubber airbags
the toughest marine salvage airbags
Buoyancy: 5t ~ 300t
Lifeboat & Davit Load Test Water Weight Bags
DOOWIN lifeboat water-filled weight bags system including professional highest quality water bags,
professional operation fittings, like diaphragm pump, water meter, manifold.
Lifeboat Test Water Bags
Professionally designed water bags
with an air valve, relief valves, and hands
Standard Capacity: 100kg ~ 1ton
Customised size available
Gangway Test Water Bags
Used for the load testing of gangway
accommodation ladder and other long structures
Standard capacity: 650kg, 13000kg
Customized size avaliable
Lifeboat Davit Load Test
Professional davit load test water bags
for better and more easily davit load test
Standard Capacity: 1t ~25ton
Customized size and shape available
Water Bladder Tanks
Liquid Pillow Tank
Pillow tanks are used for bulk liquid storage and transportation for storing fuel, water and chemicals. We have rainwater tanks, fuel bladder tanks, potable water tank.
Open Top Water Tank
We have self-rising onion shape open top water tank, and frame type open top water tank used for water storage, firefighting, and disaster relief efforts. Onion water bladder tanks.
Other Inflatable Products
Inflatable Fenders & Buoys
DOOWIN make low pressure PVC fenders and buoys. This type PVC fenders are used for the boat, commercial boat, or yacht. Can be called yacht fenders.
Inflatable Pipe Plug
Inflatable pipe plug and inflatable pipe stopper made of heavy duty PVC coating fabric and rubber. Customized size is available upon request. Inflatable PVC pipe plug and stopper.