Marine Air Bags

Marine Air Bags

Get Quote

Marine airbags, also known as ship launching airbags or marine rubber airbags, are innovative tools utilized in the maritime industry for launching and landing ships, lifting and moving heavy structures, and salvaging stranded vessels. Their versatility and cost-effectiveness have made them a popular choice for shipyards and marine contractors worldwide.

GT Winch Ship Launching Airbags

Features Of Marine Rubber Airbag

Marine airbags are meticulously constructed to withstand heavy loads and harsh marine environments. They typically consist of three primary components:

Outer Rubber Layer: This external layer protects the airbag from abrasion, weathering, and other external factors. It is crafted from a robust rubber compound with high tensile and tear strength to endure rigorous conditions.

Synthetic-Tire-Cord Layers: Serving as the reinforcement framework, these layers are made from heavy-duty synthetic-tire-cord fabric. The number of layers can vary, generally ranging from 4 to 12, depending on the required strength and application. These layers provide the airbag with its structural integrity and ability to bear substantial loads.

Inner Rubber Layer: The innermost layer ensures airtightness, preventing air leakage and maintaining internal pressure during operations.

The combination of these materials results in an airbag that is both flexible and durable, capable of withstanding significant stress during various marine operations.

Ship Landing launching Roller Bag
Model Marine airbags for ships
Lift Span Up to 20 years
Layers 3-12 Layers
Dia Range D0.8m-2.5m
Materials Rubber layer, multilayer heavy-duty synthetic-tire-cord layers, and an inner rubber layer
Working Pressure 0.10MPa-0.24MPa
air bags for heavy duty winch machines

 

air bags for heavy duty winch machines

air bag with winches

 

air bag with winches

D1.5x20m airbag for ships

 

D1.5x20m airbag for ships

Recommended Configuration Table

(For Slipway Winch Pairing)

Vessel Tonnage (DWT) Air Bag Diameter Quantity Required Winch Capacity Recommendation
< 500 1.0 m 8-10 10-15 Ton Winch
500 – 3,000 1.5 m 12-15 20-50 Ton Winch
> 3,000 2.0 m+ 18-25 50-100 Ton Winch
marine air bag for ships
Slipway Winches

What is a Slipway Winch Used For?

A slipway winch is essential for controlled ship launching and retrieval on inclined ramps. It works with marine air bags to safely move vessels (up to 10,000+ DWT) by:

  • Providing 3-15 m/min adjustable cable speed for precision

  • Handling dynamic loads during tidal changes or emergency stops

  • Syncing with pneumatic systems for low-friction operations

JMM 25T Heavy Duty Electric Winch

Slipway Winch Basic Parameters

Feature Specification
Load Capacity 10-100 Tonnes
Motor Power 15-75 kW (AC/DC)
Cable Speed 3-15 m/min (Variable Frequency)
Cable Diameter 20-50 mm (Grade 1960 Steel)
Control System PLC + Manual Override
Protection Rating IP67 (Marine Environment)
Certifications ISO 4301, DNV-GL, ABS
Double Drum JM Model Electric Winch

 

Double Drum JM Model Electric Winch

standard electric pulling slipway winch

 

standard electric pulling slipway winch

Heavy duty slipway winch

 

Heavy duty slipway winch

Key Specifications & Materials

✔️ Rugged Construction

  • Core material: 6-12 layered rubber-cored fabric (NR/SBR blend)

  • Reinforcement: High-tensile polyester cord (1,800-2,500 N/mm²)

  • Pressure rating: 0.08-0.15 MPa (customizable for slipway requirements)

✔️ Standard Sizes for Winch Compatibility

Diameter (m) Length (m) Recommended Vessel Tonnage
1.0 10-15 < 500 DWT
1.5 15-20 500-3,000 DWT
2.0+ 20-30 > 3,000 DWT

(Custom sizing available for specialized slipway winch systems)

How Marine Air Bags Work with Slipway Winches

As a leading slipway winch manufacturer, GT Winch Machinery designs air bags to perfectly integrate with our winching systems:

  1. Synchronized Launching

    • Air bags reduce ground friction by 60-70%

    • Winches provide precise 3-15 m/min controlled movement

  2. Load Distribution

    • Each air bag bears 50-300 tons (depending on size)

    • Winch capacity matched to vessel weight

  3. Safety Enhancement

    • Air cushion absorbs sudden load shifts

    • Winch brake systems coordinate with pressure sensors

Marine Rubber Airbag
D1.5x20m airbag test
pressure meter

Top 5 Industrial Applications

  1. Newbuild Ship Launching

  2. Dry Dock Retrieval Operations

  3. Barge Transfer in Restricted Spaces

  4. Emergency Vessel Refloating

  5. Marine Salvage Projects

Why Choose GT Winch Machinery?

✅ Turnkey Solutions: Air bags + slipway winches + control systems
✅ 18-year OEM experience in marine launch equipment
✅ DNV-GL & ABS certified manufacturing

Technical Support:

  • Load calculation services

  • Winch-bag synchronization testing

  • On-site installation guidance

Parameter Specification
Product Name ISO 14409 Certified Marine Air Bag (Ship Launching Pneumatic Bag)
Model Series GTAB-1000 / GTAB-1500 / GTAB-2000+ (Customizable)
Material Structure Inner Layer: 6-12 Ply NR/SBR Rubber Composite
Reinforcement: High-Tensile Polyester Cord (2,200 N/mm²)
Surface: Anti-abrasion UV-resistant Coating
Key Dimensions Standard Sizes:
• Diameter: 1.0 m / 1.5 m / 2.0 m+
• Length: 10-30 m (Adjustable per Slipway Layout)
Pressure Capacity • Working Pressure: 0.08-0.15 MPa
• Burst Pressure: ≥0.30 MPa
Load Capacity • 50-300 Tons/Bag (Varies by Size)
• Max Slope Angle: 10°-15° with Slipway Winch
Operational Compatibility • Designed for Slipway Winch Systems (3-15 m/min Cable Speed)
• Temperature Range: -30°C to +60°C
Certifications ISO 14409, DNV-GL, ABS, CCS

Other Optional Winch Accessories:

  • Customizable Solutions – Available in various load capacities, speeds, and configurations to meet specific industrial requirements.
  • High-Quality Manufacturing – Built with strict quality standards to ensure durability, reliability, and long service life.
  • Low Maintenance Requirements – Engineered for minimal maintenance, reducing downtime and operational costs.
  • Rope spooling device
industrial spooling device on winch equipment
  • Single or Double Winch Drum
Winch Drum for sale
  • Offshore Equipment
marine air bag for ships
Please feel free to give your inquiry in the form. We will reply in 8h.

OEM Supported-Free Inquiry

Email: info@gtwinch.com

 

Your Message(required):
  • Rated load(T)or pull force(KN):
  • Drum capacity(mmxm):
  • Rope/chain diameter(mm):
  • 3 phase power supply(v/hz):
  • Speed(m/min):
  • Power model(electric/hydraulic/diesel):
  • Other special requirements:
GT Industrial Winch Equipment