Hydro-Pneumatic Submarine Fenders

Explore high-performance hydro pneumatic fenders and specialized submarine fenders. Featuring Yokohama submarine fender and Submarine Palokka technologies for extreme marine applications.

Hongruntong Marine designs and manufactures high-performance hydro pneumatic fenders and rugged submarine fenders for naval, offshore and commercial berthing applications. Our product range incorporates core submarine features — low reaction force, controlled deflection and high energy absorption — and is offered in formats compatible with Submarine Palokka and Yokohama submarine fender standards. Built for predictable performance in harsh saltwater environments, Hongruntong Marine fenders protect hulls, piers and offshore assets while minimizing lifecycle cost.

We engineer specialized hydro pneumatic fenders and submarine fenders for critical marine applications. Our product line integrates the industry-proven Yokohama submarine fender and the robust Submarine Palokka series, designed with unique submarine features to deliver maximum energy absorption and operational reliability in submerged and high-pressure environments.

Features & Benefits

• Hydro-pneumatic hybrid design: combines pneumatic energy absorption with hydro-stability for smooth deflection and damping.

• Low reaction force: reduces hull stress during berthing and tandem operations.

• Controlled deflection: predictable load/deflection behaviour simplifies engineering and specification.

• High energy absorption: engineered to dissipate impact energy across a broad range of vessel sizes and approach speeds.

• Compatibility: available in Submarine Palokka and Yokohama submarine fender style configurations for easy retrofit and interchangeability.

• Robust construction: marine-grade materials, reinforced skins and corrosion-resistant fittings for long service life.

Applications

• Naval and submarine base facilities

• Offshore oil & gas installations

• Heavy commercial port terminals

• Specialized marine engineering projects

• Submersible support infrastructure

Dimensions

Detailed Images

Why Choose Our Fenders?

• Quality Assurance: Every fender is manufactured under strict quality control protocols and complies with international standards such as ISO, OCIMF, and PIANC guidelines.

• Rigorous Testing: Units undergo extensive factory acceptance testing (FAT), including pressure and performance tests, to guarantee reliability before delivery.

• Global Technical Support: Our network of service engineers provides expert installation supervision, commissioning, and after-sales support anywhere in the world.

• Maintenance and Inspection Services: We offer comprehensive maintenance programs and inspection services to ensure the long-term integrity and performance of your fendering system.

Quality & Comprehensive Service

Quality is embedded in our manufacturing process, from material selection to final assembly. Our service doesn't end with delivery:

• Quality Assurance: ISO 9001 certified manufacturing with rigorous quality control checks at every stage.

• Global Technical Support: Our team of naval architects and engineers provides expert technical support and consultation worldwide.

• Lifecycle Management: We offer ongoing service packages, including inspection, maintenance guidance, and recertification services to ensure your systems remain operational for decades.

Frequently Asked Questions (FAQ)

• Q: How does a hydro pneumatic fender differ from a standard rubber fender?

  • A: Standard rubber fenders absorb energy through material deformation. Hydro pneumatic fenders absorb energy by compressing a chamber of air and hydraulic fluid, offering higher efficiency, lower reaction forces, and tunable performance.

• Q: What maintenance is required for a hydro pneumatic fender?

  • A: Maintenance is minimal but critical. It typically involves regular visual inspections for external damage and periodic checking and adjustment of the internal gas and fluid pressures by a qualified technician.

• Q: Can they be used in extreme cold climates?

  • A: Yes. The hydraulic fluid and seals can be specified for low-temperature operation to prevent freezing and ensure performance in arctic conditions.

• Q: How long is the typical service life?

  • A: With proper maintenance and inspection, hydro pneumatic fenders have a very long service life, often exceeding 25 years, thanks to their robust construction and internal corrosion protection.

• Q: Do you provide installation services?

  • A: Yes, we offer project management and can provide certified technicians to supervise or conduct the installation to ensure it is performed correctly.