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Ship Launching Airbags - Low Cost & Reliable

Ship launching airbag, a long cylindrical roller bags with hemispherical heads at both ends, is generally considered to be innovative technology with utmost bright prospect in shipbuilding. Comparing with traditional ship-launching methods such as side-way launching, this one requires less permanent infrastructure and lower cost.

Ship launching airbags are ideal for supporting the hull of ships and providing a safer and smoother ship launching motion into water. They are normally used for tankers, tugboats, towboat, barges, cargo ship, ferries, seagoing vessels, passenger ships, AHTS, DSV and other special vessels up to 100,000 DWT.

A ship is launching using several ship launching airbags

Marine airbags for ship launching & hauling out

Features:

  • Suitable for launching at any seaside without construction of launching facilities.
  • Overcome the restriction upon fixed launching track of side-launch.
  • High strength with excellent resistance to wear and aging.
  • Good air tightness, high flexibility.
  • Well tested design and performance.
  • Save your time, effort, workload and investment.
  • Widely used by more shipyard all over the world.
  • Low maintenance.
  • Could be used repeatedly.

Composition of ship launching airbags

Ship launching airbags are composed of heavy-duty synthetic-tire-cord and quality rubber layers which are vulcanized together firmly. Beside, a sealing swivel and an air inflating end are screwed with end mouth as shown in the picture.

A plan about the structure of a ship launching airbag

Structure of ship launching airbags

A plan about the sealing end of a ship launching airbag

Sealing end

A plan about the inflating end of a ship launching airbag

Air inflating end

  • Synthetic-tire-cord layers, as the reinforcement layers, are twined at angles with excellent technology for higher internal pressure and more even stress distribution, for instance, the wrap is over 95 cords per 100 mm in width coming with breaking strength more than 310N per cords. Meanwhile, the high strength tire cords layers effectively enhance the explosion resistance capability of airbags even under high pressure. Normally, there are two types of tire cord materials with different performance for you to choose from.
  • Properties 1400 dtex/2 1870 dtex/2
    Break strength ≥ 215.6 N/strand ≥ 284.2 N/strand
    Diameter 0.65 ± 0.05 mm 0.74 ± 0.05 mm
    Adhesion strength ≤ 137.2 N/cm ≤ 156.8 N/cm
  • Inner & outer rubber layers are made complying with ISO 14409 with sufficient tensile strength and tear strength, which make them capable to withstand severe weather conditions and hard usages. The outer rubber layers are used to protect the synthetic-tire-cord layers against abrasion and various external forces.
  • End fittings, mounted at the end of airbags, include sealing ends and air inflating ends for easy control of inner pressure.

Details about ship launching airbags

  • Classification:
    • Ordinary airbag - with 3, 4 or 5 layers of cord fabric.
    • High-bearing airbag - with 6, 7 or 8 layers of cord fabric.
    • Super-bearing airbag - with 9, 10 or more layers of cord fabrics as custom request.
  • Diameter of cylindrical airbag: 0.8m to 2m or custom diameter.
  • Valid length: 6m to 20m or others.
  • Total length: 7m to 21.5m or others as your requirements.
  • Loading capacity: about 10 T/M to 40T/M.
Model Diameter (m) Initial pressure (KPa) Rated working pressure, Pe (KPa) A deformation rate of 70%, internal pressure equivalent to the rated pressure value of Pe, the airbag bearing capacity of the length of each meter. (kN/m) Minimum burst pressure (KPa)
QP3 0.8 25 130 114 390
1.0 18 100 110 300
1.2 15 85 112 260
1.5 13 70 115 210
QP4 1.8 35 170 149 510
1.0 25 130 143 390
1.2 20 110 145 330
1.5 16 90 148 270
1.8 14 80 158 240
QP5 0.8 48 210 184 630
1.0 35 170 186 510
1.2 28 140 185 420
1.5 20 110 181 330
1.8 16 90 178 270
QP6 1.0 45 200 219 600
1.2 32 165 217 490
1.5 25 130 215 390
1.8 20 110 218 330
Note: Rated working pressure: ±5%. Compress deformation: ±2%.

Inquiry for Our Product

Zaoqiang Dacheng Rubber Co., Ltd.
E-mail: info@marineairbags.com

When you contact us, please provide your detail requirements.
That will help us give you a valid quotation.