Chain Support Buoys
Hongruntong Marine’s chain support buoy is designed to support chafe chains and reduce tension in SPM systems. It provides reliable buoyancy and protects chains from seabed abrasion.

Hongruntong Marine manufactures engineered chain support buoy systems designed for demanding offshore applications. Our product range includes specialized chafe chain support buoy configurations and robust cylindrical chain support buoy designs, all manufactured to meet stringent OCIMF Specification Chain Support Buoy requirements. These professional support and mooring buoys provide essential chain protection and reliable buoyancy for vessel mooring operations in challenging marine environments.
Our chain support buoy systems represent the industry standard for offshore mooring protection, combining advanced engineering with durable marine-grade materials. The chafe chain support buoy variants feature enhanced abrasion resistance, while our cylindrical chain support buoy designs offer optimal hydrodynamic performance. Each OCIMF Specification Chain Support Buoy undergoes rigorous testing to ensure full compliance with international standards, making our support and mooring buoys the preferred choice for offshore operators worldwide.
Characteristics
Durable Construction: Made from UV-resistant, corrosion-proof, and impact-resistant materials for long-term marine performance.
Anti-Chafe Protection: Chafe chain support buoys prevent wear on chains and enhance the lifespan of mooring systems.
Cylindrical Design: Ensures even load distribution and reliable buoyancy for offshore and harbor applications.
OCIMF Specification Compliance: Designed to meet rigorous OCIMF standards for marine operations.
Versatile Applications: Suitable for ship mooring, offshore platforms, harbors, and floating structures.
Low Maintenance: Built to withstand harsh marine conditions with minimal upkeep.
Applications
FPSO and vessel permanent mooring systems
Offshore platform chain support and protection
Single point mooring (SPM) buoy applications
Harbor and port mooring installations
Marine terminal loading operations
Dimensions

| Model | Buoyancy [kg] |
Diameter [mm] |
Length [mm] |
Weight [kg] |
| HM-CSBS1000 | 1,000 | 1,080 | 1,550 | 375 |
| HM-CSBS1250 | 1,250 | 1,160 | 1,550 | 380 |
| HM-CSBS1500 | 1,500 | 1,130 | 2,000 | 445 |
| HM-CSBS1700 | 1,700 | 1,180 | 2,000 | 455 |
| HM-CSBS1750 | 1,750 | 1,190 | 2,000 | 460 |
| HM-CSBS1850 | 1,850 | 1,230 | 2,000 | 470 |
| HM-CSBS2000 | 2,000 | 1,290 | 2,000 | 490 |
| HM-CSBS2250 | 2,250 | 1,340 | 2,000 | 500 |
| HM-CSBS2500 | 2,500 | 1,400 | 2,000 | 515 |
| HM-CSBS2800 | 2,800 | 1,510 | 2,000 | 535 |
| HM-CSBS3000 | 3,000 | 1,520 | 2,000 | 550 |
| HM-CSBS3200 | 3,200 | 1,560 | 2,000 | 560 |
| HM-CSBS3500 | 3,500 | 1,630 | 2,000 | 580 |
| HM-CSBS3900 | 3,900 | 1,710 | 2,000 | 610 |

| Model | Buoyancy [kg] |
Diameter [mm] |
Length [mm] |
Weight [kg] |
| HM-CSBT1500 | 1,500 | 1,195 | 2,000 | 520 |
| HM-CSBT1700 | 1,700 | 1,260 | 2,000 | 545 |
| HM-CSBT2000 | 2,000 | 1,325 | 2,000 | 560 |
| HM-CSBT2250 | 2,250 | 1,395 | 2,000 | 580 |
| HM-CSBT2500 | 2,500 | 1,450 | 2,000 | 610 |
| HM-CSBT2750 | 2,750 | 1,505 | 2,000 | 630 |
| HM-CSBT3000 | 3,000 | 1,565 | 2,000 | 658 |
| HM-CSBT3500 | 3,500 | 1,680 | 2,000 | 750 |
| HM-CSBT4500 | 4,500 | 1,900 | 2,000 | 880 |
Detailed Photos





Why Choose Hongruntong Chain Support Buoys?
Proven Experience – Over 30 years specializing in marine and offshore solutions.
High-Quality Materials – EVA/PE foam, PU elastomer, and reinforced steel for maximum strength.
Excellent Performance – Superior buoyancy, impact resistance, and anti-corrosion properties.
Customizable Solutions – Available in various sizes and specifications for different projects.
Global Supply & Service – Fast delivery, technical support, and long-term after-sales guarantee.
Quality & Service
Quality Assurance:
UV-resistant, corrosion-proof, and impact-resistant materials
Designed and tested according to OCIMF specifications
Long-lasting construction for offshore and harbor conditions
Anti-chafe and anti-wear design for chain protection
Service Excellence:
Fast responses to inquiries and technical consultations
OEM and custom design services, including size, coating, and buoyancy adjustments
Installation guidance and operational support
Spare parts and global after-sales service
FAQ
Q1: What is the function of a chain support buoy?
A1: Chain support buoys provide buoyancy to subsea chains and mooring lines, reducing seabed contact, minimizing abrasion, and extending the service life of the system.
Q2: What materials are Hongruntong buoys made of?
A2: Our buoys are constructed from high-density EVA/PE foam with a durable polyurethane (PU) outer skin, reinforced with internal steel structures for maximum strength.
Q3: Can chain support buoys be customized?
A3: Yes, we offer customized buoyancy, sizes, and chain passage diameters according to project requirements.
Q4: How long is the service life of Hongruntong chain support buoys?
A4: Typically more than 10 years under normal marine operating conditions, with minimal maintenance required.
Q5: Do you provide certifications?
A5: Yes, we supply buoys in compliance with international standards, and third-party inspection certificates (ABS, DNV, RMRS, etc.) can be provided upon request.