Applications
The STS Challenge & Why Pneumatic Fenders Work
During cargo transfer, continuous vessel motion (heave, roll, pitch, and surge) combined with changing ballast levels causes freeboard heights to shift constantly.
Floating pneumatic fenders dynamically adapt to these continuous relative movements:
Dynamic Draft Tracking: Floating naturally on the waterline, fenders adjust vertically as freeboard heights change.
Progressive Load Distribution: Soft, high-deflection compression absorbs repeated impact spikes.
Controlled Separation: Maintains a reliable stand-off buffer to prevent steel-on-steel contact.
Marine Durability: Engineered to withstand prolonged fatigue in high-salinity offshore environments.
Typical Applications
Pneumatic fenders protect a wide spectrum of marine transfer operations:
- Crude oil & product tankers
- LNG & LPG carriers
- Bulk carriers & container vessels
- Ro-Ro vessels, FPSO, and FSO units
- Offshore support vessels (OSVs)
- Naval replenishment & emergency lightering
Key Operational Factors in Engineering Selection
Determining the required fender diameter, initial pressure, and quantity depends on kinetic energy calculations driven by specific operational variables:
Vessel Displacement: Primary factor driving kinetic impact energy.
Berthing Velocity: Impact force scales exponentially with approach speed.
Freeboard Delta: Maximum vertical shift determines fender contact belt requirements.
Environmental Criteria: Wave height, current, and wind dictate dynamic safety margins.
Contact Geometry: Approach angles determine multi-fender load distribution and spacing.
Fender Type Comparison
|
Configuration |
Tire-Chain Net Type |
Sling / Cable Type |
|
Design Feature |
Protective grid of heavy-duty tires, rubber sleeves, and chains. |
Clean rubber body with reinforced end towing rings/lugs. |
|
Best Used For |
Rough open-sea transfers, high abrasion, demanding weather. |
Smooth-hull transfers, naval vessels, non-marking needs. |
|
Key Advantage |
Superior shear force resistance and outer body protection. |
Lightweight, simplified handling, lower maintenance deck footprint. |
Data Required for Custom Sizing
To calculate accurate berthing energy absorption, engineering teams require:
- Maximum & minimum vessel displacements (MDWT / DWT)
- Fully loaded vs. ballast draft parameters
- Maximum design berthing speed & impact angle
- Site environmental operating limits (wave, current, wind)
- Required minimum stand-off distance & project safety factors