Qingdao Doowin Rubber And Plastic Co., Ltd.

Qingdao Doowin Rubber and Plastic Co., Ltd. is a leading professional manufacturer of underwater lifting bags, pipeline buoyancy bags, air lift bags, parachute air lift bags, totally enclosed air lift bags, water filled proof load test bags, lifeboat test water bags, davit test weight bags, platform proof test water bags, marine salvage airbags, pontoons, marker offshore buoys, inflatable pneumatic fenders, liquid storage bladder tanks, and other products made of heavy duty PVC or TPU coating fabric. DOOWIN underwater air lift bags include parachute type lifting bags and totally enclosed type lifting bags. The parachute type lifting bags has 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 mono buoyancy units, and twin inflatable buoyancy units. These air lifting bags can be used for the pipeline laying w...