Qingdao Doowin Rubber And Plastic Co., Ltd.  

Qingdao Doowin Rubber and Plastic Co., Ltd. is a leading manufacturer of underwater air lifting bags, proof load testing water weight bags, lifeboat & Davit test water bags, salvage tubes & Pontoons, pipeline buoyancy bags, pipe plugs, ship launching marine rubber airbags, pneumatic rubber fenders, offshore buoys, foam-filled fenders, liquid storage pillow tanks, and other products made of heavy-duty PVC or TPU coating fabric. We also provide crane load testing service, and rental airlift bags and water-filled weight bags. DOOWIN underwater air lift bags include parachute type lifting bags and totally enclosed type lifting bags. The parachute type lifting bags have open bottom type air lift bags and enclosed type air lift bags. The sealed type lifting bags include cylindrical shape enclosed air lift bags, pillow type air lift bags, elongated air lift bags, individual buoyancy bags, vertical buoyancy bags, and twin inflatable buoyancy units. These air lifting bags can be used... [View More..]