Deepwater Mooring Buoy

Hongruntong Marine supplies deep-water mooring buoy systems, deepwater buoyancy solutions, and professional underwater buoys. Advanced deepwater buoy technology for marine applications.

Hongruntong Marine designs and manufactures robust deepwater mooring buoy systems and deep water buoy solutions for offshore operators, FPSO/SBM/SPM installations and subsea projects. Our deepwater buoy product family — including pressure-compensated underwater buoy options — is engineered to deliver predictable deepwater buoyancy performance and long service life in high-pressure, corrosive deep-sea environments. We provide full lifecycle support from concept and engineering to factory testing and offshore deployment. Hongruntong Marine supplies engineered deepwater mooring buoys, deep water buoys and underwater buoys with pressure-rated designs and certified deepwater buoyancy. Turnkey design, manufacture and installation support for demanding offshore projects.

Key Features & Benefits

• Extreme Depth Capability: Our deep-water mooring buoy systems are engineered to maintain structural integrity and buoyancy performance at depths exceeding 3000 meters, utilizing pressure-compensated designs and advanced material technology

• Advanced Buoyancy Technology: The deepwater buoyancy systems incorporate syntactic foam composites with graded microsphere technology that provides optimal buoyancy-to-weight ratios while resisting compression at extreme depths

• Corrosion Protection Systems: All deep water buoy products feature multi-layer corrosion protection including specialized coatings, cathodic protection, and corrosion-resistant materials suitable for long-term deployment in aggressive marine environments

• Reliable Mooring Performance: The underwater buoy systems are designed with optimized hydrodynamic profiles and secure attachment points that ensure stable mooring performance even in strong deepwater currents

• Comprehensive Pressure Testing: Every deepwater buoyancy marine product undergoes rigorous pressure cycling and material testing to verify performance under simulated deepwater conditions, ensuring reliability before deployment

Applications

• Deep-water mooring for FPSO, FSO and production buoys

• Subsea pendant and tether buoyancy for umbilicals, risers and ROV systems

• Underwater buoyancy for subsea manifolds, frames and temporary deployment platforms

• Deepwater salvage, recovery and installation support operations

• Long-term subsea station keeping and instrumentation buoyancy

Technical Specifications

* Note: The following ends can be provided as required---Bollard in the upper side,  pad eye in the lower side; Pad eyes at both sides; Swivel eyes at both sides.

Detailed Photos

Typical Technical Options

• Buoyancy per unit: 0.1 t — 500+ t (customizable)

• Depth rating: up to project-specified depths (pressure-compensated designs available)

• Core options: Closed-cell subsea foam, syntactic foam, pressure-compensated air chamber

• Shell materials: Coated steel, HDPE, composite/GRP housings

• Fittings: Flanged connections, ROV handling bars, swivel/pivot interfaces, tether pads

• Testing & documentation: Factory buoyancy tests, material certificates, optional third-party inspection

​​​​​​​Provide required net lift, maximum depth, ambient conditions and interface requirements for a precise specification and quotation.

Why Choose Hongruntong Marine?

• Specialist engineering: Proven experience in deepwater buoyancy marine projects with tailored engineering for subsea conditions.

• Turnkey delivery: Concept design, FEM analysis, fabrication, FAT, mobilization and on-site commissioning under one contract.

• Custom manufacturing: Modular designs, material choices and foam options tailored to site specifics and client requirements.

• Global project track record: International logistics, offshore mobilization capability and local partner networks for worldwide deployments.

Quality & Service Advantages

• International Certification: All deep-water mooring buoy systems are certified to ISO 9001 quality standards and carry classification society approvals from ABS, DNV, and Lloyd's Register

• Rigorous Quality Control: Each deepwater buoy undergoes 12-stage quality verification, including non-destructive testing, material certification, and performance validation under simulated operational conditions

• Comprehensive Warranty Protection: We offer extended warranty programs covering all deepwater buoyancy products, with 5-year structural warranty and 3-year buoyancy performance guarantee

• Technical Support Services: Our engineering team provides 24/7 technical support, installation guidance, and maintenance training for all underwater buoy systems

• Custom Engineering Capability: We deliver tailored deepwater buoyancy marine solutions with custom depth ratings, specialized coatings, and client-specific certification requirements

• Global Logistics Network: With established supply chain partnerships, we ensure timely delivery of deep water buoy products to project sites worldwide, supported by comprehensive after-sales service

FAQ

Q1: What is “deepwater buoyancy” and how does it differ from conventional buoyancy?
A1: Deepwater buoyancy addresses high hydrostatic pressure, temperature and material performance at depth. Solutions use pressure-rated housings and non-absorbent buoyancy cores (syntactic or subsea foam) to maintain lift where conventional air-filled buoys fail.

Q2: Can you supply underwater buoys rated for thousands of meters?
A2: Yes. We design pressure-compensated and syntactic-foam-based underwater buoys to meet project depth ratings — specify required depth and lift and we’ll provide an engineered solution.

Q3: How is redundancy achieved in deepwater buoys?
A3: By using multi-chamber designs, foam cores or modular assemblies. These approaches ensure partial damage does not cause total flotation loss and improve operational safety.

Q4: What data do you need to quote a deepwater mooring buoy?
A4: Required information includes net lift requirement, maximum deployment depth, water density, environmental loads (current/wave), interface hardware (tether/hanger/swivel), and any class/certification requirements.

Q5: Do you provide installation support?
A5: Yes. Hongruntong Marine offers installation engineering, ROV support packages, offshore mobilization and on-site commissioning to ensure safe deployment.