What is Ship Launching Marine Rubber Airbags?
Ship launching marine rubber airbags are referred ship launching airbags, marine airbags, ship launching balloons, salvage airbags, heavy lift airbags, rubber airbags, ship rubber airbags, ship airbags, ship landing airbags and rubber roller air bags, applied to protect and assist marine, barge go into water safely or or cargo boat hauling out, vessel’s heavy object lifting, loading, ship landing, flotation and marine salvage. Ship launching airbags are greatly welcomed by shipbuilding and shipyards especially for small and medium size shipyards or ship repair companies. This ship launching marine airbags are manufactured in balloon shape, made of rubber, with air pneumaticed inner side at standard working pressure placed under ships bottom for rolling, shipping. Ship launching with marine airbags is another launching technology, more economical and less labor cost. Marine airbags are sometimes employed for heavy lifting and salvage in fields of water 
supply, offshore, construction, minerals, oil & gas field. Since born of ship launching marine airbags, it plays importanter. Marine airbags are manufactured as per below standards and two for lauching technology with airbags.
Ship Launching Airbags Constructions Feature
Qingdao Ronsen Marine Supplies Co.,Ltd are the professional leading manufacturer of ship launching airbags in China. As per requirements of iso 14409, our ship launching marine rubber airbags is made of:
One cylindrical roller body and two hemsipherical conical heads at two ends to connect ship launching airbag body and mouths of launching ship airbags. Our pneumatic (inflatable) ship launching airbags is manufactured with original holistic wrapping technology. This technology further enhance strength of ship launching marine airbags.
Reinforcement layers：It is middle layers of ship launching airbags. They are coated with rubber. Our marine airbags are manufactured with one type of synthetic-cire-cord-rubber dipped layers twined at an ideal angles only.
Ship Launching Marine Airbags Construction Notes: 1. Mouth 2. Head 3. Body
As a reinforcing material, the warp should be at least 90 cords per 100 mm in width, and breaking strength no less than 205 n per cord.
Inner/outer rubber layer：
Inner, outer rubber layers of our rubber ship launching marine airbags have sufficient tensile and tear strength required follows. We comply this requirement completely to iso 14409 and test raw rubber material per order.
Marine Airbags Specification Paraments
Standarded specification of ship launching airbag is D x EL,
Diameter (D): 0.8m, 1.0m, 1.2m,1.5m, 1.8m, 2.0m, 2.5m, 3.0m, 3.5m
Effective length (EL): from 6m to 30m
Total length(TL): from 7.38m to 29.2m
RS-6: number of reinforced synthetic tire cord rubber dipped layers, standard layer is 6, from 4 to 22 layers
Below table are generally performances of 7 layers, 8 layers, for 9 layers, 10 layers ship launching marine airbags, welcome to let us know.
ISO 14409 Ships and marine technology – Ship launching air bags
ISO 17682 Ships and marine technology – Methodology for launching ship utilizing air bags
CB/T 3837 Technological requirements for ship upgrading or launching relying on airbags, shipbuilding industry standard, PRC
CB/T 3795 Air bag for ship up or down to launching way, shipbuilding industry standard, PRC
Ship Launching Airbags Lifting Capacity
Lifting capacity of an airbag is based on working pressure and contact areas. While an airbag works, its likely to be following, vary in heights. Contact areas depending on carried ships, position of gravity center from landing to launching. Generally, the capacity is calculated as below:
F=PW1
W1=π(D-H)/2
F-lifting capacity D-diameter of airbag still
P-inner pressure H-diameter of airbag compressed
W1-contact area
How to launch the ship using ship launching airbags
① Prepare airbags and launch accessories like towing winches, air compressor and anchors etc. Inflate airbags to working pressure to test safety and airtightness.
② Clear obstacles and sharp iron or stones from the launch ramp, check the vessel bottom to prevent welding scar from puncture marine airbags.
③ Fasten towing winch with ship. Close all vessel’s valves, fix the helm and screw propeller.
④ Insert airbags between support blocks and inflate till the vessel is fully lift up. Remove the blocks.
⑤ Adjust inner pressure of airbag to low down vessel, generally, bottom vessel can be 0.5m away from ground.
⑥ All mairne airbags should be centered the ship and upright to launching direction.
⑦ Start the towing winch to release the ship slowly. When first airbag rolls out of the tow, move it to the stern and place it at planned position.
⑧ Repeat the former process and move ship to the right position.
⑨ Clean the launching area. When the water depth is enough for launch people may cut off or release the ropes to launch the ship. If the launching water area is limited, people may use towing winch to release ship slowly into the water.
⑩ Reclaim all airbags after launch.
For more details, please click Ship Launching with Airbags.
How to pull the ship ashore with marine airbags
1.Prepare the ship
Remove all weights from the ship and unload the goods.
Clear up marine lives attached to bottom of ship hull to prevent airbags from stab.
Throughly calculate required airbags quantity based on dimension of ship, weights, drafts.
2.Rampway condition
Found ramp way with sufficient bearing capacity.
Enlarge the slop of ramp way till higher than height of kneel blocks.
3.Marine airbags
Insert small short airbags into bow of ship to lift it up in accordance with ships’ bow type.
4.Winch
Opt appropriate winch and calculate the pulling force out.
5.Hauling out operating procedure
1)Tie up the ship.
2)Marine airbags placement.
3)Open the winch to draw ship ahead while bow is jacked up by marine airbags, if have not, increase the number of airbags till rise of bow.
4)Embedded more marine airbags from bow to midship to serve ship hauled to appointed position.
5)Seat ship on lifting airbags first, build blocking height.
FAQ
What’s the applications of Ship Launching Marine Airbags?
Ship launching airbags are referred to marine airbags, roller bags, inflatable airbags, rubber rollers, ship launching balloon and marine air balloon as well marine rubber airbags, marine salvage airbags and heavy lift airbags. They can be used for ship launching, ship upslip, vessel haul out, marine salvage and heavy lift.
What’s the life span of Ship Launching Airbags?
The life span of a ship launching airbags can be 6~8 years if under proper operation and storage. Normally, it depends on how many pieces airbags and how frequently of the marine airbags would be used. After some years, the marine airbags have to be inspected whether they can be used further.
What kind of certificates can you provide for the Marine Airbags?
We can provide our mill certificate, manufacturer certificate etc. as well certificates from third party classification society like CCS, ABS, BV as per your requirements.
What is your warranty time for the Marine Rubber Airbags?
Our warranty time for the marine rubber airbags normally is 18~24 months dated from receipt. From body of marine airbags to two ends accessories, all of them are warrantied.
What are the standards of Marine Airbags?
All of our marine airbags are produced and inspected fully upon the international standards ISO 14409 “Ships and marine technology – Ship Launching air bags”. Also, there are two Chinese standards for ship launching airbags we usually refer and adopt.
ISO 14409: 2011 “Ships and marine technology – Ship Launching Air Bags”
ISO 17682: 2013 ” Ships and marine technology – Methodology for Ship Launching Utilizing air bag
CB/T 3837-1998 ” Technological Requiremments for Ship Upgrading or Launching Relying on Airbags ( Shipbuilding Industry Standard, PRC)
CB/T 3795-1996 (CB/T 3795-2009) Air Bag for ship up or down to launching way (Shipbuilding Industry Standard, PRC)
How many layers of the Ship Launching Airbags can you provide?
The standard layers of ship launching airbags normally is 6 layers. But we can also provide 4 layers ~12 layers as per clients’ requirements.
How many times of your Ship Launching Airbags can be used?
Ship launching airbags can be used for many times, but when we launch a ship or upslp a vessel, it depends on how many pieces of airbags we would use. The more we use, the longer life span of the marine airbags would be. Genernally, they can be used for 6~8 years.
What is the Marine Airbags production technology?
The marine airbags are produced by whole body wrapping technology which can keep good tightness and soft bearing capacity.
What is the row material of Ship Launching Airbags?
The ship launching airbags are made from inner natural rubber layer and middle heavy duty synthetic tire cord rubber dipped layers and outer thicker rubber sheet. They are durable and stress resistant.
What is the best price you can offer for the Marine Airbags?
The price of marine airbags are calculated upon total surface of marine airbags. You can calculate the surface of one layer and then multiple the number of layers.
Why the new Ship Launching Airbags look like used ones?
While we vulcanize the marine airbags, we have to smear frech chalk on the surface of marine airbags. The water in the vulcanization tank mixed with the frech chalk and look like used airbags.
How to store the Ship Launching Marine Airbags?
Ship launching airbags should be kept in a dry place with room temperature and avoid the direct sunshine.
Avoid to connect with acid/alkaline chemical and oily pertoleum base chemical for long period.
Avoid heavy material stay upon airbags for long period
After use, airbags should be clearned firstly and dried in the sun, then can be coated with French Chalk to store.