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 work too as inflatable buoyancy units. The buoyancy capacity of our air lift bags is from 50kg to 50ton.

DOOWIN proof load test water bags include crane test water weight bags, low headroom load test water bags, platform proof load test bags, lifeboat test weight bags, gangway test waterload bags. The crane load water weight testing bags capacity is from 1ton to 100ton. The lifeboat water weight bags have 100kg, 375kg, 400kg, 600kg. All proof load test water weight bags are supplied with its accessories, ready for use. The wireless load cell will be supplied upon request.

DOOWIN liquid containment includes pillow type water tank, bulk storage pillow tank, fuel bladder, liquid transport bladder, container flexitank, conservator bladders and other special design flexible tank bladders.

DOOWIN also make the lower pressure inflatable PVC fenders used for the small boats and yachts. Marker buoys used for the sailing racing. DOOWIN inflatable pipe plugs are flow stoppers for temporary close off or seal an opening. Our inflatable pipe plug/stoppers are very suitable for use in pipeline, ducts and tunnels with construction, inspection, repairs, cleaning, and repair.

With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used for underwater salvage, and the proof load testing of cranes, davits, lifeboats, hoist, ramps & lifts, passenger gangways, platforms and bridges. With a good reputation of quality, DOOWIN is considered as the first choice of many key industry suppliers, contractors and end-users.

DOOWIN commits to high quality products with well-equipped testing equipment and strong technical force. DOOWIN's products passed rigorous ISO9001: 2008 Quality Management System. All underwater air lift bags are manufactured in line with IMCA D016 Rev3 Standard. All of our products are BV, SGS, and CCS certified.

We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!