Welcome You Visit DOOWIN
The Most Professional Manufacturer of Test Weight Water Bags and Underwater Lift Bags.
DooFlex is our trademark for flexible engineering products made of PVC/TPU material.
To Be Your Best Partner – Your safety is our mission!
DOOWIN is Chinese leading professional manufacturer underwater lift bags, marine salvage bags and crane test water weight bags in complying with international standard IMCA D016 and LEEA 051. We also produce various inflatable pipeline buoyancy units, water or fuel storage bladder tanks, inflatable boat fenders and buoys, inflatable pipe plugs, and other flexible products made of PVC/TPU coating fabric.
Our underwater lift bags include open bottom parachute type, totally enclosed type, pillow type, and other customized shapes. These air lifting bags can be used for diving work, marine salvage and refloating operation, pipeline layering buoyancy support. Our water weights bags can be used for the proof load testing for crane, lifeboat, davit and other lifting equipment. With a strong reputation for quality, DOOWIN is considered the first choice supplier by many key industry suppliers, contractors, and end-users.
Our engineers and consultants have been in fabrication and use these products for more than 30 years. DOOWIN has the clients in the Diving, Marine Rescue and Salvage, Energy and Oil, Offshore Shipping, and other industries all over the world. DOOWIN products passed rigorous ISO 9001:2008 Quality Management System, approved by the third party SGS, BV, CCS, ABS, LR, BV.
DOOWIN weight test water bags are dynamic drop test type certificated with 6:1 Safety Factor.
All our proof load bags and air lifting bags meet the standard LEEA 051 and IMCA D016.
IMCA D016 is the international industrial standard for underwater lift bags. Our air lift bags are tested to meet or exceed its safety factor 5:1.
LEEA 051 is the international standard of crane test water bags. It is explicit the requests for the elements of lifting set, which is separate from the water bags, drop test way and pressure test way to verify.
Honesty, Hard Work, Love for Others, Responsibility
Philosophies — “People Oriented, Innovation”
Quality is morality, Quality is integrity, Quality is respect to clients
DOOWIN adhere to the “People Oriented” concept. Pay attention to the application and implementation of the rules. Advocate the core value of “Honest, Hard Work, Love for Others, Responsibility”. And these core values throughout all departments and all kinds of situation management operating standards and business standards. Resolutely oppose the bureaucracy, advocating labor glorious.
Our experienced engineers and workers design and manufactured qualified water bags and salvage bags.
We create outstanding products always. We use the first-class extreme heavy duty polyurethane coated fabric.
The advanced production technology and management system can help to control the cost well, to offer the client the best price.
Build for Performance
PVC coating fabric is basic to ensure the water bags and marine salvage airbags work well. DOOWIN use the equivalent material with UK Seaflex or JW Automarine, which is better than USA Subsalve or Prolift, Turkey Safetbags, and Chinese suppliers.
High Quality Accessories
In order to ensure the overall performance of the test weight water bags and lifting air bag system, we use the high-quality accessories, shackles, master link, water hoses, lifting belts, quick connector. We pursue the perfect of each accessory.