15–200T Kidney Dock Bollard | Bolted Anchorage Mooring Bollard for Quay and Jetty

Product Overview

The kidney dock bollard is a bolted anchorage mooring bollard used on quay walls, jetties, shipyard berths, repair docks, and port mooring points for secure vessel mooring. Its kidney-shaped body provides a practical rope holding form for berth mooring arrangements, while the curved contact areas should be finished with smooth transitions to reduce local stress concentration and rope contact damage.

This bollard can be supplied in cast C-Mn steel, cast ductile iron / SG iron, cast iron, casting stainless steel, or project-specified casting material. For normal production, wooden pattern casting is used to control the casting shape and reduce harmful casting problems such as porosity and slag inclusion. Because a dock bollard is a berth safety component, casting soundness, anchor bolt arrangement, foundation connection, surface finishing, and inspection scope should be confirmed before production.

Quick Specifications

• Bollard SWL range: 15 to 200 metric tons → supports selection from small berth points to larger quay mooring positions.
• Product type: kidney-shaped dock bollard → compact mooring bollard form for quay, jetty, and shipyard berth applications.
• Installation method: bolted anchorage to dock foundation → hot-dip galvanized carbon steel anchor bolts provide corrosion-resistant mechanical fixing; bolt grade and embedment details should be confirmed by project design.
• Bolt arrangement: 4 to 8 anchor bolts → selected according to bollard capacity and foundation connection requirements.
• Material options: cast C-Mn steel, cast ductile iron / SG iron, cast iron, casting stainless steel → final grade should follow berth design, customer specification, and inspection requirement.
• Casting process focus: wooden pattern casting and controlled foundry process → helps improve casting shape consistency and reduce harmful porosity or slag inclusion.
• Surface treatment: Sa 2.5 blasting + epoxy shop primer, polished finish, galvanized finish, or customized coating → final system follows port corrosion environment and project specification.
• Optional inspection: UT, MT, FEA review, and class / third-party inspection can be arranged according to customer requirement and project approval scope.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm required bollard SWL from 15, 20, 30, 50, 75, 100, 125, 150, or 200 metric tons according to berth mooring analysis or port design drawing.

Step 2: Confirm installation location, quay / jetty foundation condition, anchor bolt layout, concrete strength, embedment requirement, grout condition, and available installation space.

Step 3: Confirm material requirement: cast C-Mn steel, cast ductile iron / SG iron, cast iron, casting stainless steel, or other project-specified casting material.

Step 4: Confirm surface treatment: Sa 2.5 blasting + epoxy shop primer, final paint system, galvanized finish, polished finish, or special anti-corrosion coating.

Step 5: Confirm inspection and calculation scope before quotation: UT, MT, material traceability, anchor bolt certificate, FEA calculation, third-party inspection, or class approval if required.

Step 6: Provide quantity, delivery destination, required delivery time, GA drawing / foundation drawing, mooring load requirement, and reference photos if available.

Structure

Kidney-shaped casting body | Smooth rope-contact crown | Curved transition area | Bolted base / seating face | Hot-dip galvanized anchor bolt set | Foundation fixing interface | Shop primer or specified surface treatment

Casting, Anchorage & Engineering Advantages

• Wooden pattern casting is normally adopted to control the kidney bollard shape, maintain repeatable geometry, and support better casting quality for berth mooring service.
• Casting quality is treated as a critical safety factor because defects in a dock bollard may affect berth mooring safety. Foundry control focuses on reducing harmful porosity, slag inclusion, shrinkage, and surface defects that may affect service performance.
• Cast C-Mn steel is suitable where strength, toughness, and impact resistance are required by the project. Cast ductile iron / SG iron can be selected when wear resistance and casting surface durability are important, subject to project load and material approval.
• Smooth radius transitions are maintained at the curved areas to reduce local stress concentration and provide a more rope-friendly contact surface during mooring.
• The bollard is fixed to the quay or jetty by anchor bolts. Hot-dip galvanized carbon steel bolts help improve corrosion resistance, while bolt grade, tightening, embedment, and foundation reinforcement should follow the civil / port design.
• UT and MT inspection can be arranged according to customer requirement to check casting soundness and surface / near-surface indications before delivery.
• Finite element analysis can be provided upon request to review stress distribution around the curved body, base, and anchorage zone under project-defined load cases.
• Surface preparation and coating can be matched with the port environment, including blasting, shop primer, final paint, galvanizing, or customer-specified protective system.

Custom Attributes

• Product Type: Kidney dock bollard → bolted mooring bollard for quay, jetty, and berth mooring points.
• SWL Range: 15–200 metric tons → select according to berth mooring design and approved load requirement.
• Material: Cast C-Mn steel / cast ductile iron / SG iron / cast iron / casting stainless steel → final material grade should be confirmed before production.
• Casting Method: Wooden pattern casting as normal production method → supports controlled geometry and improved casting consistency.
• Inspection: UT and MT available upon request → inspection method and acceptance criteria should be confirmed in the order.
• Anchor Bolts: Hot-dip galvanized carbon steel anchor bolts → bolt size, quantity, length, grade, and embedment should follow the supplied table and project foundation design.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer or customized finish → final coating system depends on port corrosion environment and customer requirement.
• FEA Calculation: Available according to project requirement → used to review stress concentration and anchorage load transfer based on confirmed load cases.
• Certificate Requirement: Available upon request → maker certificate, material certificate, inspection report, or class / third-party certificate should be confirmed before quotation.

How It Works

Mooring line is placed around the kidney bollard → Rope load is applied to the smooth curved contact area → Load transfers through the casting body to the bolted base → Anchor bolts transfer the force into the quay / jetty foundation → Inspection and maintenance confirm safe berth service condition

Applications

Quay berths | Jetty mooring points | Port terminals | Shipyard outfitting piers | Repair docks | Workboat berths | Cargo and tanker berths | New dock construction and bollard replacement projects

Certifications & Advantages

Certificates and inspection documents can be arranged according to project requirement, inspection scope, material traceability, and approval procedure.

Certification: Third party inspection certificate, Pull load test certificate

Drawing & Photos

FAQ

Q1: How should the correct kidney dock bollard capacity be selected?

A1: Select the bollard SWL according to berth mooring analysis, vessel size range, mooring line arrangement, load direction, safety factor, and quay / jetty foundation design. The supplied table provides capacity, main dimensions, and anchor bolt reference data for quotation and preliminary selection.

Q2: Which material is better for this dock bollard, cast steel or ductile iron?

A2: Cast steel is normally selected where toughness and structural strength are important. Cast ductile iron / SG iron can be considered when wear resistance and casting surface durability are key concerns. The final material should be confirmed according to berth design load, customer specification, and inspection requirement.

Q3: Can UT, MT, FEA, and certificates be provided?

A3: Yes, UT, MT, FEA calculation, material certificate, maker certificate, anchor bolt certificate, and class / third-party inspection can be arranged according to project requirement. The inspection method, acceptance criteria, and certificate scope should be confirmed before quotation.