NANHAI Product

Heavy Duty Type Pneumatic Floating Modules

The heavy-duty pneumatic buoyancy module is a sealed container that generates water buoyancy. When immersed in water, it can provide significant buoyancy for controlled lifting of sunken objects, making it an essential equipment for rapid response and emergency salvage operations in ports, waterways, and maritime disasters. It is used for salvaging sunken ships and objects, as well as assisting grounded or stranded vessels to refloat, maintaining damaged ship buoyancy and stability.

The Heavy Duty Pneumatic Type Floating Structure independently developed and produced by NANHAI
Company mainly include: heavy-duty pneumatic buoyancy units, heavy-duty net sleeves, connectors and safety valves, etc. Customized heavy-duty pneumatic floats can provide large buoyancy support for engineering projects and are very suitable for large buoyancy and mid- to long-term flotation projects.

Heavy Duty Pneumatic Type Floating Structure

Heavy Duty Pneumatic Type Floating Structure

  • The heavy-duty pneumatic buoyancy module is made of a composite material of rubber and skeletal materials.
  • Installing a net sleeve structure outside the rubber cylinder to anchor the buoyancy.
  • Control the buoyancy of the salvage float by using the inflation control valves at both ends of the rubber cylinder.
  • Large diameter specifications offer over 100 tons of buoyancy, with automatic pressure control during lifting to adapt to varying water depths for salvage.
  • The rubber skeletal material in the cylinder has high load-bearing capacity, allowing for tailored buoyancy and meeting diverse pressure requirements across different diameter specifications.
  • Maximum dimensions: 6m diameter, 30m length, and buoyancy up to 800 tons.

1.Floating body      2.Inflation control valve assembly     3.Net sleeve     4.Mooring rope     5.Transition cover     6.Protective cover     7.Inflation check valve     8.Shut-off valve     9.Safety valve     10.Reserved opening     11.Fastening ring 

NANHAI Product

Supporting Equipment

The net sleeve structure can be securely tied to floats of any diameter, enabling multi-point lateral support bundling when the float is placed horizontally and single-point axial force when placed vertically. This innovative design is particularly suitable for large-diameter floats used in heavy-duty buoyancy applications, providing easy installation, removal, and transportation. It solves the issue of inability to perform underwater buoyancy bundling for large-diameter floats.

  • The net sleeve structure ensures safe operation in tilted buoyancy postures, surpassing traditional rope winding methods.
  • The net sleeve supports float buoyancy in water, ensuring high construction safety by protecting the float's body.
  • The net sleeve structure offers a simple, cost-effective bundling method with better stress conditions compared to bundling large steel floating drums, leading to significant cost savings and economic benefits.
  • Versatile and reusable, the net sleeve structure lowers procurement costs, reduces construction time, and enhances the economic benefits of projects.
NANHAI Product Advantage

Advantages of Heavy Duty Pneumatic Type Floating Structure

  • The rubber cylinder is flexible, allowing for a vacuum state and easy folding. It occupies minimal space, is lightweight, and facilitates transportation.
  • With a material density of around 1.3, the float's weight in water is significantly lighter than in air, making it convenient for underwater installation.
  • High overall buoyancy efficiency results in low unit buoyancy costs, providing the float with a competitive advantage in terms of unit buoyancy costs.
  • The heavy-duty pneumatic float, with a net sleeve, enables force transmission at mooring points. It boasts a rational structure, easy installation, and reliable performance.
  • The float has an inflation control device for leak prevention, automatic air release, emergency release, and valve protection, ensuring internal pressure safety.
NANHAI Floating Technology

Application Of Buoyancy Technology

Enterprise committed to explore marine technology and in-depth innovation in floating technology. Nearly 20 years of in-depth research on marine floating engineering which accumulated rich and valuable engineering project experience. The enterprise's floating structure technology R&D team can customize safe, stable and economical overall technical solutions for different offshore floating projects.