QINGDAO DOOWIN MARINE ENGINEERING CO., LTD.
Professional Manufacturer of Marine Rubber Airbags, Yokohama Type Fenders and Offshore Foam Buoys
Doowin Marine is a professional manufacturer of ship launching airbags, pneumatic rubber fenders, foam-filled fenders, inflatable pipe plugs, and offshore foam buoys.
Doowin Marine is the leading manufacturer of ISO 14409:2011 or CB/T 3795 rubber airbags/marine inflatable airbags. Marine rubber airbags, known as ship launching airbags or ship launching balloons, can be used for ship launching and landing, heavy lifting, and marine salvage.
Our floating fenders include pneumatic rubber fenders and foam-filled fenders. Our Yokohama-type pneumatic rubber fenders are produced and inspected in compliance with ISO 17357. Our inflatable pipe plugs are widely applicable to all kinds of municipal pipesfor blocking as stoppers. We also produce various offshore foam buoys used for surface-to-sub-sea operations at depths of up to 7000m.
Our engineers and consultants have been in fabrication and use these products for more than 30 years. Doowin Marine has clients in the ship building, marine rescue and salvage, energy and oil, offshore shipping, and other industries all over the world. Doowin Marine products passed a rigorous ISO 9001:2008 Quality Management System, approved by the third-party SGS, BV, CCS, ABS, LR, BV.
Doowin Marine: Pioneering Airbag Engineering Solutions Worldwide
Industry Leadership
As the global pioneer in specialized airbag engineering, Doowin Marine delivers cutting-edge solutions for vessel launching, hauling, heavy load transportation, and structural relocation. Our exclusive dual certification from Lloyd’s Register (LR) and China Classification Society (CCS) underscores our technical excellence, supported by a proven history of serving prestigious international clients.
Comprehensive Project Services
We offer end-to-end project management for:
- Marine Operations: Successfully executing 100+ vessel launches and 50+ dry dockings with a flawless safety record.
- Diverse Launch Expertise: Handling everything from standard barge deployments to complex catamaran launches under challenging conditions (low tides, poor slipways, or inclement weather).
- Structural Solutions: Adapting airbag technology for concrete/steel structures like cofferdams, with customized ramp designs for ground-based launches.
- Consultation and project guidance: We can offer you technical consultation or engineering guidance services for your underwater project.
Specialized Capabilities
- Heavy Lifting: Our high-contact-area airbags outperform hydraulic jacks in safety and lift capacity, ideal for fragile-bottomed LPG/LNG tanks.
- Caisson Logistics: Efficiently relocating 100+ caissons (up to 6,000 tonnes) without traditional trolleys.
- Military/Gov Projects: Leading in cost-effective fortification and bunker relocations for government contracts.
- Salvage Support: Providing buoyant airbags for underwater vessel recovery.
Value-Added Services
- Engineering Design: Advanced simulation software optimizes launch procedures and identifies risks pre-execution.
- Equipment Solutions: Offering winches (10T–50T) and airbags (1.0M–2.0M diameter) for sale/rental.
- Global Support: Deploying expert teams across 30+ countries with six-continent operational experience.
- Knowledge Transfer: Complimentary training in airbag maintenance, launch techniques, and beaching methods.
Doowin Marine combines innovation with operational rigor to redefine marine and industrial engineering standards globally.
Doowin Marine is a professional manufacturer of ship launching airbags, pneumatic rubber fenders, foam-filled fenders, inflatable pipe plugs, and offshore foam buoys.
In 2006, our founders were engaged in the Marine Rubber Fenders Industry.
In 2007, we produced the first Marine Rubber Airbags and launched the First Ship using our airbags.
In 2008, we produced the first Pneumatic Rubber Fenders for the 2008 Qingdao Olympic Sailing Events.
In 2010, we started producing the Foam Filled Fenders.
In 2011, our parent company was established. It is engaged in the industry of Buoyancy Assistance and Marine Salvage.
From 2012 to 2021, we have been engaged in the production and sales of pneumatic rubber fenders and rubber airbags under the BUODER brand.
In 2015, our EVA Foam Mooring Buoys product line was completed.
In 2021, with the support of a new round of financing, we launched the new global brand - Doowin Marine. It specialises in the production and sales of pneumatic rubber fenders, rubber airbags, and marine buoys.
In 2022, the company began the research and development and production of Deep-sea Glass Microsphere Composite Foam Material.
In 2023, the company expanded its production scale and improved its production technology for Marine Rubber Airbags and Pneumatic Fenders.
In 2025, the company's production capacity continued to increase. We passed the ISO 9001 Quality Management Certification.
Meet the Team - Versatile Driven Innovation
Employees are the cornerstone of enterprise development. DOOWIN MARINE adheres to a "people-oriented" approach and focuses on talent team building. By building a scientific management system, it enhances employees' happiness, develops the careers of enterprises and employees into a community of destiny, and promotes the quality and sustainable development of DOOWIN MARINE.
Driven by a passion for progress, our R&D experts turn challenges into industry-leading ship-launching, fendering and buoyancy solutions. Our dedicated R&D team relentlessly pursues innovation, ensuring our products stay ahead of your evolving needs.
Doowin Marine is a professional manufacturer of ship launching airbags, pneumatic rubber fenders, foam-filled fenders, inflatable pipe plugs, and offshore foam buoys. Doowin Marine is the leading manufacturer of ISO 14409:2011 or CB/T 3795 rubber airbags/marine inflatable airbags.
