Wide Applications of Various Types Underwater Air Lifting Bags
Underwater air lifting bags are essential buoyancy tools widely used in marine engineering, underwater salvage, and pipeline installation. By inflating with air, they provide controlled buoyancy for lifting, refloating, load reduction, and recovery operations. Based on design and application, air lifting bags are generally classified into three main types.
Totally enclosed air lifting bags
Totally enclosed air lifting bags are mainly used for surface and shallow-water operations and are commonly manufactured and tested in accordance with standards such as IMCA D016 Rev.3. They provide stable static buoyancy and are widely applied in pipeline laying, surface buoyancy support, bridge pontoons, floating platforms, dock gates, as well as for reducing vessel draught and supporting cable or pipeline float-out operations.
Parachute type air lifting bags
Parachute type air lifting bags feature a water-drop shape and are suitable for use at any water depth, especially in deep-water lifting. With a single-point attachment design, they are ideal for lifting sunken objects and lightening underwater structures such as pipelines. These bags are typically made from heavy-duty polyester fabric coated with PVC and equipped with load-rated, traceable lifting slings and connectors.
Parachute type air lifting bags
Pillow type air lifting bags are mainly used in shallow water and offer high lifting capacity. They can be used in various positions, upright or flat, making them suitable for vessel salvage, towing operations, and emergency flotation systems. They are generally manufactured from high-strength PVC-coated fabric and fitted with webbing harnesses, shackles, over-pressure valves, and quick couplings, with customization options available.
Selecting the appropriate type of air lifting bag is essential for ensuring operational efficiency and safety. If need, welcome to contact us, we can custom according to your need.
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