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DooFlex, a division of DOOWIN Rubber & Plastic Co., Ltd, provides underwater lift bags, salvage tubes and proof load testing water bags for the offshore industry. DooFlex is China's leading designer and manufacturer of products made from heavy-duty PVC or TPU-coated fabric. DooFlex's products pass a rigorous ISO9001 quality management system. With a strong reputation for quality, DooFlex is considered the first choice supplier by many key industry suppliers, contractors and end users. Heavy-duty underwater air lift bags Heavy-duty air inflated underwater air lift bags products are used worldwide for raising sunken objects, vessel salvage, marine structure stabilisation, underwater equipment transport, pipeline and equipment towing, and standby emergency buoyancy. All DooFlex air lift bags are manufactured to comply with IMCA D016 guidelines. Totally enclosed air lift bags Totally enclosed air lift bags (salvage tube, inflatable buoyancy bags) are an effective alternative to open-bottom parachute-type lifting bags for the surface buoyancy support operation as one kind pontoon. Totally enclosed air lift bags can be used for buoyancy support and re-floatation operation in shallow water and on the surface, support / salvage pontoons for bridges, floating platforms, dock gates, sunken objects or military equipment. Totally enclosed lifting bags offer an effectual method of reducing the draught of vessel and floating underwater structures. They also provide an ideal system of buoyancy for cable and static buoyancy support. The lifting bags are cylindrical-shaped units, fabricated from heavy-duty polyester cloth coated with PVC, completely equipped with appropriate quantity of automatic air relief valves, certified heavy-duty polyester webbing with shackles, and air inlet stainless / brass ball valves. The overall assembly has a minimum 6:1 safety factor for its working load. Open-bottom air lift bags DooFlex open-bottom air lift bags are designed with parachute shaped units, which are widely used for buoyancy support or lifting sunken objects operation of underwater diving work. The open-bottom design makes the operation safer. It's a one kind of floatation device for diving and underwater marine salvage, and underwater buoyancy support and re-floatation. DooFlex open-bottom parachute-type lift bags are fabricated from high tenacity PVC-coated polyester fabric. Each open-bottom air lift bag is equipped with manual air dump relief / dump valve, which can be controlled easily to change the buoyancy by the bottom rope. Certificated heavy-duty polyester webbing with end shackles, and air inlet stainless / brass ball valves are equipped for the lifting operation. Each parachute lifting bag is fold compactly for easy carrying and storage. It is complete and ready for use when leaving our manufacturing facility. Proof load testing water-filled weight bags DooFlex proof load testing water-filled weight bags are specially designed as a simple, safe and cost-effective proof load testing solution for lifting equipment and structures, whether for static or dynamic load testing of davits, winches, cranes, lifting equipment, beam and wire falls, in both marine and industrial sectors. All water weight bags are made of high tenacity PVC-coated polyester fabric using radio frequency welding technology. Each water bag equipped with certificated shackles, master-link, webbing straps. The overall assembly has a minimum 6:1 safety factor for its working load. Each water weight bag is tested and certified before delivery. And crane test water weight bags got the CCS 'Certificate of Type Approval'. In addition, we also can provide third-party certificate from BV, ABS, SGS and others. Lifeboat testing water bags DooFlex lifeboat testing water bags are designed with a bolster cylindrical shape, made of heavy-duty PVC-coated fabric, and equipped with fill / discharge fittings, handles and an automatic relief valve, which is activated once the water bags achieve the designed weight. Because of the lifeboat testing water bags' economy, convenience and high efficiency advantages, this system is widely used for the distributed proof load testing of lifeboats and any other equipment that needs distributed proof load testing, such as crew bastes, gangways, small bridges, and so on. Enclosed pillow air lift bags DooFlex enclosed pillow air lift bags are versatile with a totally enclosed pillow type. The pillow type air lifting bags can be used in shallow water with a maximum lift capacity for re-floatation work and towing jobs. Enclosed pillow type air lift bags are manufactured from high-strength PVC-coated fabric, which is highly abrasion and UV resistant. Each enclosed pillow air lift bag is equipped with a heavy-duty webbing harness with single pick points and screw pin shackle, over-pressure valves, stainless-steel ball valves and quick disconnects. Custom sizes and rigging options are available on request. Inflatable buoyancy bags DooFlex elongated inflatable buoyancy bags / pontoon air lifting bags are manufactured using high-quality PVC-coated fabric, equipped with a heavy-duty webbing harness with single pick points and screw pin shackle, over-pressure valves, stainless-steel ball valves and quick disconnects. Custom sizes and rigging options are available on request. Elongated inflatable buoyancy bags are widely used as salvage tube/ salvage pontoon for the supporting docks and other floating structures, and it also excellent for the pipe-laying and shipwreck salvage, re-floatation projects.