Steel Spherical Buoy

Hongruntong Marine supplies steel spherical buoys, spherical steel mooring buoys and steel buoy balls for SPM, SBM and offshore mooring. Heavy-duty fabrication, anti-corrosion coatings, custom buoyancy and global delivery.

Hongruntong Marine specializes in manufacturing high-performance Steel spherical buoy systems and durable spherical steel buoys for demanding marine environments. Our comprehensive product range includes robust steel buoy balls, professional spherical steel mooring buoys, reliable metal sphere buoy solutions, and certified Steel Mooring Ocean Buoys. These engineered buoyancy systems provide secure mooring capabilities and exceptional stability in challenging offshore conditions.

Our Steel spherical buoy products represent advanced marine buoy technology, combining spherical geometry with heavy-duty steel construction. The spherical steel buoys feature optimized hydrodynamic profiles that minimize water resistance, while our steel buoy balls incorporate precision engineering for consistent buoyancy performance. Each spherical steel mooring buoys is manufactured to exacting standards, and the metal sphere buoy solutions offer reliable positioning in strong currents. All Steel Mooring Ocean Buoys are crafted from certified marine-grade materials, ensuring long-term durability in corrosive saltwater environments.

Key Features & Benefits

• Robust steel construction: Fabricated from marine-grade steel plate with precision welding for high structural strength and impact resistance.

• Corrosion protection: Hot-dip galvanizing, epoxy primer + polyurethane topcoat, or other marine coatings to maximize lifetime in saltwater environments.

• Predictable buoyancy: Factory-calculated buoyancy ratings and internal partitioning deliver accurate lift and center-of-gravity control.

• Compact spherical geometry: Spherical shape provides even stress distribution, low drag, and excellent stability in waves and currents.

• Customizable specifications: Diameters, wall thickness, internal baffling, and lift points are tailored to project loads and installation methods.

• Integration ready: Fittings for shackles, swivel attachments, mooring eyes and tether pads are provided per client interface requirements.

• Low maintenance: Robust coatings and sacrificial anodes minimize corrosion maintenance cycles and lifecycle cost.

Applications

• Offshore oil and gas platform mooring

• Harbor and port mooring installations

• Marine navigation and channel marking

• Oceanographic research buoy systems

• Aquaculture and fishing operations

• Marine construction and temporary mooring

Specifications

Some typical dimensions: 28", 36", 58". 58” is standard buoy.

Detailed Photos

Why Choose Our Steel Spherical Buoy?

• Unrivaled Strength & Resilience: The toughest solution for the most demanding marine challenges. Outlasts and outperforms plastic.

• Cost-Effective Lifetime Value: Lower total cost of ownership (TCO) due to minimal maintenance and decades-long service life.

• Superior Stability & Reliability: Ensures consistent positioning and visibility, critical for safety and navigation.

• Heavy-Duty Load Capacity: Handles demanding applications where lighter buoys are inadequate.

• Proven Q235 Steel Construction: A trusted, high-strength material engineered for structural applications.

• Global Performance Standard: Built to withstand the harshest marine conditions worldwide.

• Customizable Solutions: Tailored to meet your exact project specifications and requirements.

• Sustainable Choice: Long lifespan reduces waste and resource consumption compared to frequently replaced plastic buoys.​​​​

Quality & Service Advantages

• International Certification: All Steel Mooring Ocean Buoys are certified to ISO 9001 quality standards and carry approvals from major classification societies including ABS and DNV-GL

• Comprehensive Testing: Every Steel spherical buoy undergoes rigorous quality testing including structural integrity verification, buoyancy performance validation, and corrosion resistance evaluation

• Extended Warranty Program: We offer 5-year warranty coverage on all spherical steel buoys, including protection against structural defects and premature corrosion failure

• Technical Support: Our marine engineering team provides complete technical support for steel buoy balls selection, installation planning, and maintenance program development

• Custom Manufacturing: We deliver tailored spherical steel mooring buoys with specific diameter requirements, special coating systems, and customized connection configurations

• Global Logistics: With established supply chain networks, we ensure timely delivery of metal sphere buoy products to project sites worldwide

FAQ

Q1: What is the advantage of a spherical steel buoy vs a pontoon buoy?
A1: Spherical buoys provide uniform stress distribution, lower drag and better resistance to impact; they also occupy less deck space for transport and offer predictable buoyancy characteristics.

Q2: Can you supply steel buoy balls with foam fill for guaranteed positive buoyancy?
A2: Yes. We offer foam-filled or pressure-compensated designs to ensure positive buoyancy even if the shell is penetrated.

Q3: What coatings are recommended for long offshore life?
A3: Typical choice is hot-dip galvanizing followed by epoxy primer and polyurethane topcoat. Thermal spray or duplex systems are available for aggressive environments.

Q4: Do you provide certified test documentation?
A4: Yes. Material mill certificates, weld reports, NDT records and factory acceptance test (FAT) reports are provided. Third-party or Class inspection can be arranged.

Q5: How do I specify the correct buoy size and buoyancy?
A5: Provide the required net lift (including chain/hardware weight), environmental loads (max current/wave), deployment depth and interface details. We will deliver calculation, drawing and quotation.

Q6: Can spherical steel mooring buoys be fitted with swivels and mooring hardware?
A6: Absolutely. Buoys are supplied factory-fitted or prepared with flanged plates, integrated padeyes and swivel sockets per client interface specifications.