Kidney Bollards
Hongruntong supplies Kidney Bollards (kidney shaped) & mooring dolphin bollard—premium mooring bollard construction for ports, marinas, offshore docks.
Hongruntong Marine manufactures specialized Kidney Bollards featuring unique kidney shaped bollard designs for enhanced mooring performance. As experienced producers of various types of mooring bollards, we prioritize robust mooring bollard construction and offer integrated mooring dolphin bollard systems for comprehensive port infrastructure solutions.
Our expertise extends across multiple types of mooring bollards, with Kidney Bollards representing our innovative approach to marine infrastructure design. The distinctive kidney shaped bollard configuration ensures superior rope retention and optimal load distribution, while our advanced mooring bollard construction techniques guarantee exceptional longevity and reliability. We also provide complete mooring dolphin bollard packages specifically engineered for challenging marine environments and heavy-duty applications.
Key Features
- Targeted Design for Scenarios: Kidney Bollards solve rope slippage for shallow-water, small-vessel mooring; mooring dolphin bollard addresses deep-water/offshore needs—two core types cover 80% of marine mooring scenarios.
- Reliable Mooring Bollard Construction:
- Material selection: Cast iron for cost-sensitive freshwater use; 304/316 stainless steel for saltwater/offshore (resists -30℃ to 60℃ temperatures).
- Crafting process: Precision casting (no internal air bubbles) + 2x anti-rust treatments—service life up to 15-20 years (3x longer than ordinary bollards).
- Full Type Coverage: As part of our types of mooring bollards, we offer customizable variants (e.g., mini kidney bollards for jet skis, heavy-duty dolphin bollards for tankers) to avoid "one-size-fits-all" compromises.
- Easy Installation & Maintenance:
- Kidney Bollards: Flange-mounted (4 pre-drilled holes) – 1 worker installs 5 units/day; rinse with freshwater to clean.
- Mooring Dolphin Bollard: Includes foundation mounting kit – comes with installation drawings (depth, bolt torque specs) to reduce on-site errors.
Applications
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Commercial Ports & Terminals: Berthing container ships, bulk carriers, tankers, Ro-Ro vessels.
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Marinas & Yacht Harbors: Mooring recreational boats and yachts securely.
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Shipyards & Dry Docks: Holding vessels during construction, repair, and maintenance.
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Ferry Terminals & Quaysides: Essential for reliable daily docking operations.
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Inland Waterways & Barges: Securing barges and workboats along rivers and canals.
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Offshore Support Bases: Mooring supply vessels and crew transfer boats.
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LNG Terminals & Oil Jetties: Critical safety component for high-value assets (specify enhanced material grades for these applications).
Technical Specifications
| Material | Marine-grade steel, cast iron, or composite options |
| Dimensions | Customizable length, width, and height based on project requirements |
| Net Working Load (SWL) | Configurable from 5 tons up to 50+ tons depending on size and application |
| Finish/Coating | Epoxy primer + polyurethane topcoat; optional anti-corrosion or anti-fouling treatments |
| Mounting/Base Type | Flange-mounted, embedded, or bolt-down options available |
| Rope Compatibility | Designed for multiple mooring line diameters and configurations |
| Standards Compliance: | Conforms to international marine safety standards for mooring equipment |
| Environmental Resistance | Resistant to saltwater, UV exposure, and heavy weather conditions |
| Optional Accessories | Lifting lugs, bollard covers, or identification plates |
Detailed Photos
Why Choose Us?
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Specialized Design: Expertise in kidney shaped bollard engineering and manufacturing
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Comprehensive Range: Wide selection of types of mooring bollards for all applications
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Quality Construction: Superior mooring bollard construction with rigorous quality control
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Integrated Solutions: Complete mooring dolphin bollard system packages
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Global Experience: Successful projects in international marine markets
Quality Assurance Process
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Material Inspection: Test cast iron/stainless steel for chemical composition (e.g., cast iron carbon content 3.2-3.6%)—reject substandard raw materials.
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Casting Quality Check: Use ultrasonic testing to detect internal cracks in kidney tops or dolphin posts—ensure structural integrity.
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Load Testing: Apply 150% of rated capacity (e.g., 30 tons for a 20-ton kidney bollard) for 2 hours—no deformation allowed.
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Corrosion Resistance Test: 2,000-hour salt spray testing for 316 SS dolphin bollards; 1,500 hours for galvanized kidney bollards—no rust within warranty.
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Dimensional Verification: Confirm kidney arc radius, dolphin height, and flange hole positions match design specs—guarantee installation fit.
FAQ
Q: What’s the difference between Kidney Bollards and mooring dolphin bollard?
A: Kidney Bollards (curved top, 8-20 tons) suit shallow-water, small vessels (yachts, fishing boats) in marinas/docks. Mooring dolphin bollard (tall post, 25-50 tons) is for deep-water/offshore, securing large ships (tankers) – both follow strict mooring bollard construction standards.
Q: Can kidney shaped bollard be used in saltwater?
A: Yes—choose the 304 stainless steel variant (with galvanizing). It resists salt spray and barnacle growth, ideal for coastal small ports; for long-term offshore use, upgrade to 316 SS (same as dolphin bollards).
Q: How to choose load capacity for mooring dolphin bollard?
A: Match it to the ship’s displacement: 25-35 tons for 5,000-10,000 DWT ships; 40-50 tons for 10,000-20,000 DWT tankers – we provide displacement-capacity matching guidance for free.
Q: What’s the lead time for Kidney Bollards?
A: Standard models (8-20 tons) in stock—ship within 3-5 days; custom sizes (e.g., mini kidney bollards for jet skis) take 12-15 days.
Q: Do you offer after-sales repair for mooring bollard construction issues?
A: Yes—2-year warranty for material/construction defects (e.g., casting cracks); we send repair kits (welding rods, touch-up paint) for free, or arrange on-site repair for large mooring dolphin bollard orders.
