The Mooring Bollards Series Kidney Bollard features a unique
enclosed "kidney" or "panama" shape. This design is specifically
engineered for use with large, heavy mooring ropes and wires common
on bulk carriers, tankers, and VLCCs (Very Large Crude Carriers).
The closed profile prevents ropes from jumping off under sudden
slack or load conditions, a critical safety feature for
large-vessel operations.
Case Study: Bulk Terminal, Port Hedland, Australia
A iron ore export terminal was experiencing "rope jump-off"
incidents during the rapid loading of Capesize bulk carriers. The
sudden change in vessel draft would create slack in mooring lines,
which would then violently snap tight and sometimes dislodge from
traditional bollards. After installing Mooring Bollards Bollards,
the terminal completely eliminated jump-off events, enhancing
safety for crew and infrastructure and preventing costly loading
delays.
Specifications
| Product Name | Mooring Bollards |
| Brand Name | Hongruntong Marine |
| Material | Carbon Steel, Stainless Steel, Alloy, Ductile Iron |
| Color | Black and Customers' Requirements |
| Shape | Tee, Horn, Pillar, etc. |
| Standard | ISO 13797:2020, PIANC2002 |
| Surface Treatment | Galvanizing Spraying |
| Application | Port, Dock, Quay, etc |
Product Features
Enclosed Loop Design
The signature kidney shape fully contains the mooring rope,
providing the highest level of security against accidental release,
even when the line goes slack.
High Capacity Design
Typically rated for SWL from 150t to 550t+, these bollards are
manufactured from normalized high-yield steel (Q345B/ ASTM A572 Gr.
50) to handle the enormous forces generated by mega-vessels.
Low Friction Wear Plate
The inner throat of the bollard is often fitted with a replaceable,
polished stainless steel wear plate. This allows ropes to slide
smoothly during tensioning while resisting abrasion.
Streamlined Profile
The design minimizes sharp edges that could cut or chafe ropes,
thereby extending the service life of expensive synthetic and steel
wire mooring systems.
Applications
Oil Gas Terminals
Essential for safely mooring vessels carrying hazardous cargo. A
mooring failure here could have catastrophic environmental
consequences.
Operational Flow
Heavy wires and synthetic tails are fed through the opening and
looped within the enclosed space. The design allows for multiple
lines to be stacked securely.
Note
The opening must be kept clear of debris. Inspection for wear on
the internal wear plate is crucial during routine maintenance.
Dry Bulk Terminals
Used for coal, ore, and grain carriers that undergo significant
changes in draft during loading/unloading, which creates dynamic
line tension.
Tugboat and Shipyard Mooring
Provides an ultra-secure point for heavy-duty tow lines and for
securing vessels during repair and outfitting.
Why Choose Hongruntong Marine?
Specialization in Heavy Duty Marine Hardware
We have a proven track record of supplying some of the world's
largest terminals. Our engineering team understands the unique
challenges of mooring VLCCs and Capesize vessels.
Cutting-Edge Design Simulation
We use Finite Element Analysis (FEA) to simulate the extreme loads
on the bollard and optimize the design accordingly, ensuring
perfect performance under real-world conditions.
Full Project Support
For critical projects, we can provide on-site technical supervision
during installation and commissioning to ensure everything is
performed to specification.
Global Spare Parts Availability
We stock replaceable wear parts, like inner wear plates, in key
global logistics hubs to ensure quick delivery and minimize
downtime for our clients.
FAQ
1. Q: What is the minimum rope diameter your kidney bollard can
accommodate?
A: The internal dimensions are designed based on the SWL. We design
the opening to comfortably accommodate the standard rope sizes used
for that load class. Please consult our dimensional drawings for
specifics.
2. Q: How do you prevent ropes from chafing on the inside of the
bollard?
A: We address this with the optional renewable stainless steel wear
plate, which provides a smooth, hard, and low-friction surface that
significantly reduces chafing.
3. Q: Can the bollard be used with automatic mooring hooks?
A: Yes, the kidney shape is often compatible with certain types of
automatic quick-release hook systems. This requires precise
coordination between us and the hook system supplier during the
design phase.
4. Q: What is the typical installation process for a 300t SWL
kidney bollard?
A: It requires a massive reinforced concrete foundation. Our
technical package includes detailed embedment drawings, required
concrete strength (e.g., C40/50), and the specifications for the
high-tensile anchor bolts (typically ASTM A193 B7). Installation is
done using a large crane and requires precise alignment.
