- 材质：天然橡胶
- 形状：balloon
- 直径：D0.8~2M
- 使用压力：0.13~0.3Kpa
welcome to knowevergreen maritime ship launchingairbags
ship launching airbags, also known as roller bags or ship launchingballoon, are made of heavy-duty synthetic-tire-cord layers withinner and out rubber layers in long cylindrical balloon shape. shiplaunching airbags can be used for the ship launchingor shiplandingof tanker, tugboat or barges, carrying vessel,carrier, ferry and other special vessels (ahts, dsv) and so on. thebiggest vessel launched by ship launching airbags up to 85,000dwt.
ship launching relying on ship launching airbags is a innovativeship launching technology, comparing with “end-on launching”, “sideship launching”, “float-out”. this ship launching technologyovercomes the restrictions of fixed launching track of side-launch.ship launching airbags are accepted by more more shipyard worldwide because of its advantages of saving time, saving investment,flexible, safety.
airbag selection
a.saving the investment of shipyard construction
the construction of launching facilities, like traditional slideway and its underwater engineering, are very
expensive.if using airbag launch, only a simple launching slip way shall be built without complex underwater
engineering.
b.simple operation,saving labor and work hours
airbag launch avoids lots of trouble, such as the complex process of cleaning away the mucky soil on the
surface of the slideway, covering or smearing with lubricating grease, setting slide plates and transoms and then binding them with hull, so as to save material consumption,man-hour and expending time on preparation.usually the preparation for airbag launch maybe finished
within one or two days due to the whole process is simple.the airbags may be reused by retrieving after operatiion,that drops shipbuilding cost considerably.
c.environmental friendly
currently, countries in the world are highly regarded as an important act to promote environmental protection.
classification & size
1. standard size of marine airbags:
diameter (d) : from 0.8m to 2.0m.
effective length (el) : from 6m to 18m.
total length (tl) : from 7m to 19.5m
2.standard number of layers:
we define the number of layer, which means the number ofsynthetic-tyre-cord layer, in order to confirm the safety workingpressure. normally, evergreen shipping airbags include 4, 5, 6, 7, 8 layers types. othertypes is available upon clients request.
there’re two kinds of synthetic-tire-cord because of the differentperformance.
3.marine airbag selection:
it is easy to choose suitable airbags by yourself.standardspecifications of evergreen shipping air bags. we can manufactureas clients\' request.
marine rubber airbagsfor ship launching
marine rubber airbagsfor marine salvage
construction features of ship launching airbagsship launching airbags are to be constructed of an out rubberlayer, multilayer heavy-duty synthetic-tire-cord layers, and aninner rubber layer vulcanized firmly. ship launching airbags arecylindrical balloon body, with two conical head and end mouth. airtightness swivel and air inlet kits are screwed with end mouth.
• the outer rubber layer covers the outside of ship launchingairbags. to protects the cord layers from abrasion and otherexternal forces. this compound has sufficient tensile and tearstrength to withstand any weather condition and hardusage. • synthetic-tire-cord layer isreinforcement layer of the ship launching airbags which are made ofrubber coated synthetic-tire-cord fabrics. many synthetic-tire cordlayers are twined at ideal angles by unique and patented “holistic wrapping technology“. to hold the internalpressure and to distribute the stress evenly.evergreenmaritime use the 1870 dtex/2 type synthetic-tire-cord fabric. thewarp is over 95 cords per 100 mm in width.the breaking strength is more than 310 n percords.
our properties requirements of outer and inner rubber materialcomply with iso 14409.
classification of ship launching airbagsship launching airbags are categorized by “ordinary airbags”,“high-bearing capacity airbags”, and “super-high-bearing capacityairbags” according to the bearing capacity. we use “yt” as the typecode.
• yt-qp ordinary airbags — the air bag with 3, 4 or 5 layersof cord fabric • yt-qg high-bearing capacity airbags — theair bag with 6, 7 or 8 layers of cord fabric • yt- qssuper-high-bearing capacity airbags — the air bag with 9, 10 ormore layers of cord fabric
the standard diameter of ship launching airbags (d) varies such as0.8m, 1.0m, 1.2m, 1.5m, 1.8m and 2.0m, etc. the standard effectivelength of air bag (el or l) is from 6m to 18m, which should bespecified by the user. other specification ship launching airbagsalso can be supplied upon request.
ship launching airbags performance parametersthe follow show the performance of yt-6 (6 layers type), 7 layers,8 layers, 9 layers, and 10 layers ship launching airbags. for theperformance of over 10 layers airbags, please feel free to contactwith us.
iso14409 standardyt-6yt
note: 1. rated working pressure may deviate ±5%. compressdeformation may deviate ±2%. 2. for the bearing capacity atdifferent compress deformation, please refer our catalogue.
acceptance test for commercial ship launching airbagsevergreen maritime test the ship launching airbags purchased basedon the test items indicated below:
• the appearance of each evergreen maritime ship launchingairbag is smooth, glossy and without blemish such as crack,blister, delamination, pits or impurities.
• the length and diameter of each evergreen maritime shiplaunching airbags are measured with the rated working pressure andis within ±3%.
• the gas-tightness is tested without carrying any load asper iso 14409. the pressure loss is less than 5% of rated workingpressure within 1 hour.
evergreen maritime ship launching airbags are typeapproved. this means we have demonstrated the performance of shiplaunching airbags to independent inspectors ccs.typeapproval test is the essential and necessaryqualification of qualified manufacturer of ship launching airbags.in addition to the requirements for the material, appearance anddimensional tolerances, “gas-tightness test”, “compressiontest”, “bearing capacity test”, “bursting test”, and“compression-recovery test” are carried out.
shiplaunching airbags burst test
all evergreen maritime ship launching airbags are manufactured andtested comply withiso 14409 “ships and marine technology – shiplaunching air bags“, certificated by ccs, lr, dnv.there are two more china industrial standards and one iso standardfor ship launching airbags:
– cb/t 3837-1998 technological requirements for ship upgrading orlaunching relying on airbags (shipbuilding industry standard,prc) — cb/t 3795-1996 / cb/t 3795-2009 air bag for ship up to ordown to launching way (shipbuilding industry standard,prc)
– iso 17682 ship sand marine technology —methodology forlaunching ship utilizing air bags
advantage of evergreen marine air bags
1,advanced framework design .
2.over 20 years\' exprience in marine airbags, more improvements are reflected inproduction.
3.high strength synthetic-tyre-cord-layers ,high construction performance.
4.anti-aging ,durable practical.
5.hydrostatic presure test.
6.more flexible,easy installation.
7.good airtightness safty and reliability.
8.economical, good after service.
9.all the products were manufactured with our responsibility.
10.good technical supports
11.we can sign the contact for quality and after sale service.
actually, our company is ofstrongpoints in ship launching airbags .please refer to the link .
1. compared with other suppliers
2.advancedequipment
3 large factory work shop and goodenvironment
classification & size
it is easy to choose suitable airbags by yourself.standard specifications of evergreen shipping air bags. we can manufacture as clients\' request.
1. standard size of marine airbags:
diameter (d) : from 0.8m to 2.0m.
effective length (el) : from 6m to 18m.
total length (tl) : from 7m to 19.5m
2.standard number of layers:
evergreen airbags are widely used for marine engineeringprojects:ship launching and hauling out, heavy lifting andtransportation, ship salvage,etc. those application are found to becost-effective and convenient.
available diameters and lengths of evergreen airbags range from 0.8to 2.0 m and 4-22 m, respectively. ragular airbag pliesare 4,5,6,7,8.
the technology of ship launching with air bags developed from small flat bottom ship of several ten tons to good-sized,complicated,high value added ships and blazed a successful one for its own development road.
the practice proves that the ship whose dwt exceed 50,000 tons launched by air bags is feasible as the advancing of manufacture technology of intensive air bags and the design of slipways. to launch ships dwt more than 50,000 tons people must consider the following measures:
take more care of the design of air bag ship launching slipway which has the higher demand of the degree and degree variety.basing on the ships’ selfweight, center of gravity, the form of ship bottom, degree of slipways, water level, people should calculate every motion of the ship during the launch process to testify the rationality of air bags positions.people should pay more attentions to calculate the ship stree and inner pressure when the stern drops.
production process ofevergreen airbags
青岛永泰船舶用品有限公司
Karen Liang
18661646025
店集镇中心社区