There are two industrial standards for marine airbags in China.: one is product standrad named “Air bag for ship up to or down to launching way “(CB/T 3795-1996 / CB/T 3795-2009) ;another is technology standard named “Technological Requirements for ship Upgrading or Launching Relying on Air-bags”(CB/T 3837-1998).The latter offer the basic calculation of marine airbags employed in a marine project.
According to Chinese industrial standards people will know the approximate quantity and specifications of marine airbags needed for their projects then consult the manufacturer to confirm the design. There maybe optional specifications to be selected for a specific marine project and a good manufacturer should know the best choice. Suggestions from Qingdao Evergreen Maritime Company :for ship launching, the airbag’s diameter and length should not execeed 2.0 meter and 18 meter respectively;for caisson conveying, the 1.0 meter diameter is suitable for most projects.
The data of marine airbags’ blasting pressure will reveal the product’s quality level. For top quality marine airbags,such as one 1.5 m diameter and 7 m length Evergreen marine airbag, the blasting pressure is 0.67 Mpa which indicates the safe coefficient is more than 5 considering its 0.12Mpa working pressure.
Full technical service is the qualification of a good company. Although general calculation formula or performance data of marine airbags can be got from most factories but detailed calculations based on mathematic model and experience is more important to the success of marine projects.
In a word
Marine airbag is a simple but powerful marine tool which should get more attention from people involved in marine fields. It is less limited by equipments and landform and can save most investment and time to complete a marine project. And the flexibility of marine airbags not only mean airbags can give more protection to being launched objects but also it can be used creatively.
