High-Strength Stainless Steel Marine Mooring Chock Ballard – Customizable Sizes, Corrosion-Resistant, Multiple Color Options for Lifesaving & Mooring Applications

Material and Manufacturing:

Material Advantages:

1. **Traditional Metal Materials**

**1. **Cast Steel**:** This is one of the mainstream materials for this type of component. It possesses extremely high mechanical strength and impact load resistance, capable of stably withstanding the enormous tensile forces during lifesaving mooring operations in harsh environments such as rough seas, preventing component deformation or breakage. Furthermore, after surface treatments such as sandblasting and epoxy coating, it can resist seawater corrosion, extending its service life. It is suitable for the heavy-duty lifesaving mooring requirements of large vessels and can pass certifications from authoritative classification societies such as BV and ABS, meeting the high reliability standards of lifesaving equipment.

2. **Cast Iron**: Possesses excellent load-bearing capacity and wear resistance, with relatively affordable manufacturing costs, making it suitable for mooring components on small and medium-sized vessels or coastal/nearshore vessels. Its robust structure can stably secure ropes in conventional lifesaving mooring scenarios. After coating treatment, it can mitigate seawater corrosion problems, meeting the basic stability requirements of general lifesaving operations.

3. **Ductile Cast Iron**: As an upgraded version of cast iron, its tensile strength and toughness are far superior to ordinary cast iron, while retaining good corrosion resistance and load-bearing performance. In lifesaving mooring, it can withstand the instantaneous tensile impact of the rope without easily breaking due to long-term use, making it suitable for near-shore lifesaving operations with high safety requirements, and with low maintenance costs.

4. **316 Stainless Steel**: Possesses excellent resistance to seawater corrosion and rust prevention, allowing for long-term use in marine environments without complex surface anti-corrosion treatments. Its smooth surface reduces frictional damage when the lifeline contacts components, ensuring the integrity of the rope in emergency rescue scenarios. Its lightweight nature also facilitates installation and removal on light vessels such as yachts and small lifeboats.

2. **New Composite and Polymer Materials**

1. **Engineering Polymers (such as Nylacast custom-formulated materials)**: This type of material is commonly used in components such as the padding of the mooring guide hole. It has an extremely low coefficient of friction, significantly reducing wear when the lifeline (such as HMPE fiber rope) contacts the guide hole, preventing rope breakage due to wear during emergency rescues. Simultaneously, the material is lightweight, self-lubricating, requires no additional painting or maintenance, and is corrosion-resistant, making it suitable for various marine environments. 1. **No heat treatment or dockwork is required during installation, allowing for rapid adaptation to emergency modifications or maintenance of lifesaving equipment.**

2. ****Fiberglass Reinforced Plastic (FRP)**:** A lightweight, high-strength material, significantly lighter than metals while meeting the tensile strength requirements of lifesaving mooring. Completely unaffected by seawater corrosion and possessing excellent insulation properties, it is suitable for use in specialized lifesaving scenarios (such as mooring operations around offshore electrical equipment). Furthermore, this material is easy to maintain, reducing maintenance costs during long-term inactivity of lifesaving equipment and ensuring availability in emergencies.

Manufacturing Process:

It is mainly formed by casting, with a focus on structural stability and bearing capacity, and some improved processes adopt assembled structures to improve production efficiency. The specific processes are as follows:
1. **Material Selection and Verification**
Materials such as cast iron, cast steel and ductile iron are commonly used. The selected materials should pass tensile strength, corrosion resistance and impact resistance tests to ensure they can withstand the strong tension of mooring cables in life - saving scenarios.
2. **Mold Making and Casting**
First, a sand mold is made according to the shape of the bollard. Then the selected metal is melted in a furnace to the required temperature, and the molten metal is poured into the prepared sand mold. After natural cooling and solidification, the initial blank of the bollard is obtained. For some assembled bollards, hollow circular tubes are selected as raw materials to replace the traditional casting of cable guide parts, thus saving the mold - opening time.
3. **Blank Cleaning and Machining**
First, the solidified blank is cleaned to remove sand, oxide scale and residual materials on the surface. Then, machining is performed according to design specifications to ensure accurate dimensions and flat surface. For assembled bollards, processes such as cutting and welding of circular tubes are carried out to assemble vertical circular tubes, horizontal circular tubes and cable - mooring circular tubes into the required structure.
4. **Performance Testing**
Visual and dimensional inspections are carried out first to confirm that there are no obvious defects and the dimensions meet the standards. Then load tests are conducted to ensure the bollard can bear the specified mechanical force without deformation or fracture.
5. **Final Finishing and Marking**
Anti - corrosion coatings such as galvanizing or powder coating are applied on the surface. Finally, identification information such as serial number, manufacturer's logo and load - bearing capacity is marked on the product. After passing the final inspection, the product can leave the factory.

Features:

Structure is designed to protect mooring ropes
It is mainly available in circular, oval, horn - shaped and other ring structures, and there are also single and double types. The double chock can bear the pressure of two traction steel cables, and its throat opening area is not less than 900 cm². The inner surface and all welding parts of the mooring chock have no visible defects. The contact surface with the mooring rope is particularly smooth, without roughness or irregularities, which can avoid the rope being worn and reduce the tensile strength loss of the rope due to bending and friction. In addition, some models are also equipped with reinforcing plates or stiffeners to improve the stability of the connection.
Strong load - bearing capacity and standardized production
It is manufactured in accordance with the ISO 13713 standard. The safe working load ranges from 353 kN to 1373 kN, which can firmly withstand the huge tension of the mooring rope when the ship is berthed or towed. It is suitable for ships using nylon or other synthetic ropes, and can stably guide the rope from the inside of the ship to the outside, ensuring that the rope is under stable stress.
Diversified installation methods and wide applicability
There are two main installation methods: deck - mounted and bulwark - mounted. It can be flexibly installed according to the structure of the ship and is widely used in cargo ships, passenger ships, engineering ships, naval ships and offshore platforms. Meanwhile, rotating models are available. This type is equipped with a heavy - duty roller mechanism, which converts static friction into rolling friction and is more suitable for ships that need frequent mooring operations.
Excellent corrosion resistance
The exterior of the mooring chock is coated with anti - corrosion protective coatings. It is often made of corrosion - resistant and durable materials such as cast steel and stainless steel. It can resist the erosion of salt water and humid air in the marine environment for a long time and maintain stable performance.

Technical Parameters:

Application Scenarios:

Various types of ships
Large commercial ships: Closed mooring chocks are commonly used on bulk carriers, oil tankers and container ships. Their enclosed structure with a smooth inner surface can firmly guide the mooring ropes, reduce the probability of rope jumping, adapt to the large tension of the mooring ropes of large ships, and avoid excessive wear of the ropes during long-term mooring. Among them, Panama chocks are especially suitable for oil tankers, which can ensure the safety of the ropes and minimize slippage.
Small and medium-sized ships: Open mooring chocks with U-shaped or open-top structures are often installed on tugboats, fishing boats and pilot boats. These ships often need rapid mooring and unmooring operations. The open design of such chocks makes rope threading and unloading more convenient and efficient. Roller mooring chocks are also equipped on tugboats that frequently perform towing and mooring tasks. The roller structure converts static friction into rolling friction, which greatly reduces the wear of ropes and chocks during frequent rope movement.
Offshore and marine engineering fields
It is applicable to single-point mooring systems of offshore oil platforms and offshore wind power operation platforms. When these marine engineering facilities need to be connected with supply ships or maintenance ships for material transportation and personnel transfer, mooring chocks can guide the mooring ropes in an orderly manner. Even in the offshore environment where wind and waves are volatile, it can ensure that the ropes are stressed stably, avoid rope deviation and damage, and ensure the safety of docking operations.
Port and wharf auxiliary operations
It is matched with the mooring equipment of the wharf for the temporary mooring of some special ships such as pilot boats and port service boats. These ships have the characteristics of small tonnage and frequent berthing. The deck-type mooring chocks installed on them are compact in structure, which is convenient for line operation at the deck level and meets the needs of efficient berthing and leaving the port.

Support and Services:

1. Full-Process Technical Support
Preliminary Design
Provide professional selection guidance, recommending suitable single-post bollard models (e.g., 50-500+ kN load rating) and materials (e.g., 316L stainless steel, cast steel, FRP, etc.) based on parameters such as terminal class, vessel type, and hydrological conditions (e.g., tides and waves).
Assist in anchoring system design, including anchor specifications, concrete filling scheme, and anti-corrosion coating system (e.g., three-layer epoxy zinc-rich coating, total thickness ≥ 280 μm, design life 15 years).
Provide 3D modeling and simulation analysis to verify the bollard's stability under dynamic loads, such as evaluating the impact of tidal fluctuations on the anchoring structure through finite element analysis.
Installation and Construction Support
Provide standardized installation manuals and construction plans, covering key steps such as foundation preparation, anchor calibration, torque control (applied to 110% of the design value in three steps), and concrete pouring. On-site Technical Guidance: Engineers are dispatched to assist with lifting and positioning (e.g., ensuring verticality deviation ≤ 1° using a four-point hanger), bolt tightening (recording each point with a torque wrench), and anti-corrosion repair (adding 50mm to the damaged area).

Specialized tools and equipment are provided, such as ultrasonic flaw detectors to detect internal defects and torque wrenches to ensure bolt preload meets standards.

II. Quality Assurance and Certification Services

Strict Quality Testing

Raw Material Inspection: Steel undergoes tensile strength (≥800MPa) and impact toughness (≥20J/cm²) testing, while cast iron undergoes hardness (HB180-220) and metallographic analysis.

Manufacturing Process Control: Utilizing processes such as die casting and CNC machining, we ensure dimensional accuracy (e.g., column verticality deviation ≤ H/1000) and surface quality (sandblasting and rust removal to Sa2.5). Finished Product Testing: Corrosion resistance is verified through a destructive test at 125% of the rated load (no plastic deformation after 30 minutes of load holding) and a salt spray test (no corrosion after ≥1000 hours in a neutral environment).

International Certification Support

We provide certifications such as ISO 13795, GB/T 25010, ABS, DNV, and Lloyd's Register to ensure compliance with international port access standards.

We support customers in completing on-site classification society inspections, including welding procedure qualifications and non-destructive testing (such as magnetic particle inspection) according to DNV specifications.

 
 
In addition, we offer a range of services to complement our mooring bollards products. These include custom design and engineering, installation and commissioning, and repairs and upgrades. Our goal is to provide a comprehensive solution to meet your mooring needs, from product selection to ongoing support.
Any question please let us know ,our JinCheng maritime will provide you the best service with 7*24 hours ~