Inflatable marine airbags can be equipped with the lifting belts and shackles, used for marine salvage and refloatation work as marine salvage airbags.
This type marine salvage airbags are the toughest buoyancy units. It can be used as salvage pontoon for the supporting docks, and other floating structures. Also can be used to salvage the shipwreck, rescue the floating bridge and dock construction, buoyancy loading from any depth water. It really come into own when marine salvage airbags employed in heavy duty salvage work under severe environment.
Inflatable marine salvage airbags have better air tigtness than ship launching airbags. It can be used in water for long time without inflating air. All end fittings are stainless steel to resistance the corrosion of seawater. We also can equip the auto safety pressure relief valves upon request, which can be opened when the inner pressure reach rated value.
Structure of Marine Salvage Airbags
Marine salvage airbags are to be constructed of an out rubber layer, multilayer heavy-duty synthetic-tire-cord layers, and an inner rubber layer vulcanized firmly. It has the cylindrical balloon body, with two conical head and end mouth. Air tightness swivel and air inlet kits are screwed with end mouth.
Polyester webbing lifting straps are located symmetrically along the body of marine salvage airbags. The pick points of every strap are then connect to one screw pin shackle. The total lifting of these straps shall maintain a minimum 6:1 safety factor of the operational load.
Advantages comparing with PVC Air Lift Bags
PVC air lift bags have been widely used for the diving or marine salvage industry. Our marine salvage airbags are made by multilayer heavy-duty synthetic-tire-cord layers. It’s more sturdy and reliability than PVC air lifting bags, which is made only by one layer PVC coating fabric. The disadvantage of marine salvage airbags is too heavy, not easy to transport and operate.
Super-high tensile strength – Heavy-duty synthetic-tire-cord layers is framework material of our marine salvage airbags. The breaking strength of each synthetic-tire-cord layer is more than 15,000 N / 5cm, which is two times of PVC coating fabric material.
Resistant to abrasion – The thickness of our marine salvage airbags is up to 12mm or more. The PVC air lift bag only is about 1.5mm. In bad environment, the PVC air lift bag is easily scratched or damaged by sharp objects. But our marine salvage airbags can resistant the scratch. Even the out rubber was damaged, the inner synthetic-tire-cord layer also can work well.
Multiple application – Normally, the parachute type PVC lifting bags used for the lifting work from underwater. The enclosed type lifting bags used for the buoyancy support of surface. But our marine salvage airbags are qualified for these two work, because of its high working pressure and burst pressure.