A rubber fender is an energy-absorbing rubber unit installed on a quay face, a dolphin or a vessel hull so that a ship and a berthing structure do not damage each other on contact. The principle purpose of a rubber fender system is to protect the hull and berthing facility from damage when vessels berth alongside. Behind that definition sits a product family — pneumatic, foam-filled, cone, cell, arch, cylindrical, D, W, square and tug fenders — and each type compresses differently, which is why "rubber fender" describes a category rather than one specification.

This guide is written for buyers at the start of a fender project: port authorities, terminal operators, shipyards, naval procurement teams, marine contractors and importers who need to understand the options, the standards, and the verification steps before they issue an enquiry to China rubber fender manufacturers for ports.

The Berthing Problem a Rubber Fender Solves

A berthing vessel arrives with kinetic energy that has to go somewhere. Without a fendering system, that energy is absorbed by the ship hull and the berth structure, and both lose. Rubber fenders work because they deform under compression, convert impact energy into heat and elastic recovery, and then return to shape so the berth can accept the next vessel.

The engineering problem is more varied than a single impact case. Fendering has to cope with:

• High-energy impact berthing from large-tonnage vessels, where reaction force must stay within the limits of the quay structure.
• Oblique and angled contact, where a fender that only performs well on a perpendicular hit will be overloaded on the corner of the berth.
• Tidal range fluctuation, where the contact point on the hull moves up and down the fender face during loading and discharge.
• Shear and friction, generated by tug pushing, mooring movement and constant rubbing along the face.
• Over-compression, which is why fender specifications differentiate between a rated design deflection and a maximum permissible deflection that is not intended for continuous operation.
• Salt spray, UV and ozone exposure, and temperature cycling, typically addressed in rubber fender compounds designed to operate from -30 °C to +80 °C.

This is why fender selection depends on vessel size, berthing energy, tidal variation, berth structure and operational conditions — not on a headline number quoted without context.

Industry Background: A Standards-Led Category

Rubber is the dominant fendering material. Rubber fenders accounted for approximately 64.17% of the total marine fender market share in 2024, and the global marine fenders market is projected to reach USD 0.89 billion in 2026, with a forecast period extending to 2031 (Mordor Intelligence, Marine Fenders Market Size, Share & 2031 Trends Report). For buyers, that means the category is mature, competitive and specification-driven rather than supply-constrained.

Three reference points shape how the category is bought and sold:

• Product standards. ISO 17357-1:2014 specifies the requirements for high-pressure floating pneumatic rubber fenders and is the definitive standard for that product family. Manufacturers and suppliers commonly reference PIANC 2002 guidelines for fender system design and selection.
• Trade classification. Boat and dock fenders of vulcanised non-cellular rubber, whether or not inflatable, are classified internationally under HS Code 4016.94 — the starting point for customs duty and import documentation on any fender shipment.
• Supplier landscape. Public supplier catalogues list cone, cell, arch, cylindrical, D, square, pneumatic, foam-filled, roller and donut fenders. Catalogue presence alone does not establish production capacity, certification scope or delivery reliability, so supplier pages are a shortlisting tool, not a verification.

The Rubber Fender Range: How the Main Types Differ

Pneumatic Rubber Fenders (Yokohama Type)

A pneumatic rubber fender is a compressed-air-filled fender used as the protective medium for ship-to-ship (STS) contact, ship-to-quay (STQ) and ship-to-berthing (STB) operations. Pneumatic rubber fenders have been used as a marine anti-collision device for approximately 50 years, which is why the type is often specified by default on open-sea and high-tidal-range projects.

Florescence pneumatic rubber fenders are manufactured in China from natural rubber and nylon cord, with an internal pressure of 50 or 80 kPa, in diameters from 0.5 m to 4.5 m and lengths from 1.0 m to 12 m. They are supplied as chain-and-tyre-net (CTN) type or sling type, with fittings including tyre net, shackle, swivel and chain, and are certified by CCS, BV, ISO, RS and ABS.

Typical use is on offshore platforms, oil and gas tankers, fast ferries and aluminium vessels, fishing vessels, transport ships and ocean trawlers, and in ports with extreme tidal variation. The operating sequence is straightforward and is worth understanding before installation planning:

1. Rigging — secure the fender to the hull or quay with chains and shackles.
2. Inflation — inflate to 50 or 80 kPa with an air compressor and verify with a pressure gauge.
3. Protection — the fender floats on the waterline and continuously absorbs impact energy during berthing.
4. Maintenance — check internal air pressure periodically and adjust as needed.
5. Deflation — open the valve to deflate, then fold and store after use.

Foam Fenders

A foam fender uses a solid foam core with polyurethane polyurea coating instead of compressed air. Because there is no air chamber, the fender is unsinkable by design, remains functional even if the skin is punctured, and requires no air pressure maintenance, inflation or valves. It is maintenance-free and non-marking, available in multiple colours and shapes, with a service life of 5 to 8 years and a size range of 0.5 m to 4.5 m diameter and 1.0 m to 12 m length.

Foam fenders are designed for severe weather and storm conditions and suit existing structures and certain hull types such as catamarans and cruise ships. They serve offshore oil and gas, ship-to-ship transfer, cruise, naval, bulk port and marina applications, and can be used on tugboats, work boats, pilot boats, high seas terminals, gravity ports and large tidal piers.

Cone Fenders

A cone fender is a marine rubber fender with a conical cell body shape, made of marine NR/SBR rubber, with chloroprene rubber (CR) available as an optional compound for oil resistance and EPDM available for UV resistance. The rated deflection is 70% and the maximum permissible deflection is 72.5%, with a reaction force tolerance of ±10% and an energy absorption tolerance of -10%. Rubber hardness is Shore A 60 to 70, and the operating temperature range is -30 °C to +80 °C.

Two design features matter in service: cone fenders are fitted with overload stops that limit over-compression, and they are designed with angular performance characteristics for oblique berthing contact. They are specified for large-tonnage vessel berthing and are intended for container, bulk, oil, RoRo and offshore terminals, including general cargo berths, oil and LNG facilities, container berths, RoRo and cruise terminals, parallel motion systems, monopiles and dolphins.

Cell Fenders

A cell fender is a marine rubber fender with a cylindrical cell body, made of marine NR/SBR with optional CR for oil resistance and EPDM for UV and ozone resistance. Its rated deflection is 52.5% and its maximum permissible deflection is 55%, with the same ±10% reaction force tolerance and -10% energy absorption tolerance, Shore A 60–70 hardness and a -30 °C to +80 °C operating range. Florescence Cell Fenders conform to ISO17357 and PIANC standards and are available in reaction force grades RL (Low), RO, RH, RS and RE (Extra High).

Cell fenders support large panels and suit low hull pressure systems, and they are interchangeable with many older marine cell fender types — a practical advantage for terminals replacing or extending an existing fender line. Typical applications include oil and LNG facilities, bulk terminals, offshore platforms, container berths, RoRo and cruise terminals and multi-user berths.

In a like-for-like comparison, cell fenders are cost-effective and suitable for general berths, while cone fenders provide higher energy absorption efficiency and lower reaction force for large vessels.

Arch Fenders

An arch fender is a one-piece natural rubber marine fender made of a marine NR/SBR rubber compound, manufactured in accordance with the PIANC standard. Rated deflection is 52.5% and maximum permissible deflection is 55%, with Shore A 60 to 70 hardness, ±10% reaction force tolerance, -10% energy absorption tolerance and a -30 °C to +80 °C operating range.

The arch profile is designed to accommodate shear loading in berthing applications, and both reaction force and energy absorption are linearly proportional to fender length — which makes scaling a berth line predictable. The Super arch fender is a rubber-faced unit, while the SANP-fender variant can be fitted with UHMW-PE face pads or connected to a steel panel. Arch fenders are used for dock protection at marine terminals and port berths and are intended for RoRo berths, general cargo terminals, workboat harbours and barge and tug berths.

Cylindrical Fenders and Tug Fenders

Cylindrical fenders are a simple, versatile marine fender system with a progressive load-deflection curve and a thick wall that resists abrasion and wear. The rated deflection is 50% and the maximum permissible deflection is 60%, with marine NR/SBR compound as standard and optional CR for oil resistance or EPDM for UV resistance, Shore A 60–70 hardness, ±10% reaction force tolerance and -10% energy absorption tolerance.

They apply to general ports, fishing harbours, inland canals and shipyards, and are available in a wide size range. Because they use easy hanging mounting, cylindrical fenders handle multi-angle impact and large tidal variation well — including bulk cargo berths, general cargo quays, RoRo and ferry terminals, fishing and workboat berths, pontoons and floating structures, and tug havens.

A tug fender is a cylindrical fender adapted for tug operations — pushing, standing, stretching and leaning — using vulcanization technology for performance and service life, and easy installation.

W Fenders

A W fender uses a W multi-arch cross-section that produces progressive compression and a smooth reaction force curve during deflection. Under the same compression, a W fender delivers 20–30% lower reaction force than a D-type fender, which is significant when the quay structure or hull imposes a reaction limit. Rated design deflection is 30% and maximum permissible deflection is 35%, and some heavy-duty W models reach a rated deflection of 50% to 52.5%.

The flexible legs allow the fender to be bent to follow a curved hull contour at the bow and stern radius, the wide contact surface keeps hull surface pressure low, and the open bore design allows simple bolt mounting and easy maintenance or replacement. W fenders are intended for quay wall protection and tugboat hull protection, and are suitable for icebreakers, ocean-going tugs, large harbour tugs, and bridge and pile protection.

D Fenders

A D fender is an extruded rubber fender with a flat back that simplifies installation on a variety of surfaces. Florescence supplies D fenders from DD 100 to DD 500 in lengths of 1 m to 3 m, in marine NR/SBR rubber with optional CR or EPDM compounds, Shore A 60–70 hardness, a rated deflection of 50%, a maximum permissible deflection of 60%, and the same ±10% / -10% tolerances and -30 °C to +80 °C operating range.

The profile offers moderate and suitable reaction force and energy absorption, is lightweight and easy to maintain, and is especially suitable for frame-type wharves and wharf shore protection. Typical applications include fishing harbours, inland terminals, marinas and shipyards, and tugboat side protection.

Square Fenders

Square fenders have a square outer form with either a D-shaped centre (SD Fender) or a cylindrical centre bore (SC Fender). They are made of natural rubber, range in height from 100 mm to 500 mm, and are also available in a PE pad type. Standard sizes cover most requirements, and customised supply is possible for pre-curved or special sizes.

Applications include fishing harbours, small jetties and inland river terminals; marinas, pontoons and floating docks for yachts and speed boats; side belting for tugboats, pilot boats, workboats and barges; shipyards, dry docks, lock gates and canal walls; berths for small to medium cargo vessels; and land loading docks and warehouse bumper protection.

Step-by-Step: Specifying and Verifying a Rubber Fender System

The sequence below reflects how a fender specification is normally built, from project inputs to shipment release.

1. Collect the operating inputs. Vessel size, berthing energy, tidal variation, berth structure and operational conditions are the five variables that determine fender selection. Tug-only berths and STS transfer points add shear and open-sea criteria that land berths do not have.
2. Shortlist the fender geometry. Match the profile to the contact case: pneumatic or foam fenders where the fender must float or where a vessel cannot tolerate high reaction force; cone fenders for large-tonnage and oblique berthing; cell fenders for general berths and panel systems; arch and cylindrical fenders for general cargo, RoRo, tug and workboat berths; D, W and square fenders for hull side protection and confined spaces.
3. Fix the deflection working point. Confirm the rated design deflection, and keep the maximum permissible deflection as a limit rather than an operating target. W fender series, for example, are rated at 30% deflection with 35% as the ultimate limit.
4. Confirm the compound and environment. Standard marine NR/SBR is the base; CR is available for oil resistance and EPDM for UV and ozone resistance. Verify the hardness range and the -30 °C to +80 °C operating window against project temperatures.
5. Define the full system scope. A complete fender system can include anchor bolts, chains, shackles, frontal panels, UHMW-PE pads and installation brackets. Anti-corrosion options include hot-dip galvanizing, epoxy coating, marine paint systems and zinc-rich primer coating, and the choice affects both service life and delivered cost.
6. Agree the inspection and documentation package. A production batch typically goes through rubber raw material testing, dimensional and hardness checks for rubber fenders, and air-tightness testing for pneumatic fenders and ship launching airbags, under an ISO 9001 certified quality system. Third-party inspection by SGS, Bureau Veritas (BV) or LR is accepted on request.
7. Confirm traceability and release. Metal parts and bolts can be supplied with EN 10204 3.1 Mill Test Certificates, and rubber products with physical property reports covering tensile strength, elongation and compression. Coating thickness on steel components is measured with digital gauges, and UHMW-PE pad hole patterns and anchor bolt pitch are dimensionally checked for on-site fit. A full Quality Inspection Report with rubber test data, sizing sheets, coating thickness records and product photos can be issued before final payment.
8. Plan production and shipping. Standard rubber fenders and pneumatic fenders take 25 to 30 days after deposit; large custom orders or complete fender systems take 40 to 45 days. Shipment is available by sea freight, air freight, LCL or FCL, with pneumatic fenders shipped deflated to reduce freight cost and steel parts wrapped against rust. Export documentation includes the Commercial Invoice, Packing List, Bill of Lading and Certificate of Origin.

Where Rubber Fenders Are Used

Rubber fender systems are specified across ports, shipyards, vessel operations, offshore facilities, marine engineering and naval applications. The most common project contexts are:

• Container, bulk, oil and LNG terminals — heavy-tonnage berthing where energy absorption and reaction force limits drive the design. Cell, cone and arch fenders are the standard choices.
• RoRo, ferry and cruise terminals — high-frequency contact, wide tidal movement and, on some vessels, non-marking surface requirements.
• Tug, pilot and workboat operations — pushing, standing and leaning contact that produces continuous shear and abrasion rather than a single impact. W, D and cylindrical/tug fenders address this case.
• Ship-to-ship (STS) transfer — floating pneumatic and foam fenders positioned between two vessels, including oil and gas tankers and offshore platforms.
• Naval applications — demanding technical specifications, inspection requirements and delivery schedules. Florescence products have been supplied to the Bangladesh Navy, French Navy, Royal Thai Navy, Italian Navy and Philippine Navy.
• Fishing harbours, marinas and inland terminals — smaller vessels, mixed traffic and low reaction tolerance, typically addressed with square, cylindrical and D fenders.

Reference shipments illustrate how these categories are supplied in practice: 64 sets of arch fenders measuring 600 x 2000 mm shipped to Saudi Arabia; cone fender units in 1050 mm and 1150 mm sizes supplied as multi-container shipments; DD200 x 1000 mm D fenders in service in Thailand; and cell fenders supplied to a port in Sudan and to projects in South America. Pneumatic fenders have also been inspected by BV in sizes such as D2.5 m x L5.5 m.

Rubber Fender Type Comparison

About the Manufacturer Behind This Guide

Qingdao Florescence Marine Supply Co., Ltd. was established in 1992 and is a professional manufacturer specializing in pneumatic rubber fenders, ship and dock rubber fenders, ship launching airbags and salvage airbags. The company operates a 40,000 m² manufacturing facility with approximately 120 employees and a 25-engineer R&D and technical support team, producing about 2,000 pieces of marine rubber fenders and airbags per year. Approximately 95% of products are exported, with major markets in Southeast Asia, South America, Europe, North America, the Middle East and Africa.

Products are designed, manufactured and tested in accordance with ISO 9001:2015 quality management requirements, and can be manufactured and inspected according to applicable requirements of CCS, BV, RS, ABS and LR based on project requirements. Technical support covers product and specification selection, manufacturing, inspection, delivery and installation guidance.

Frequently Asked Questions

Conclusion: Start With the Operating Case, Not the Product Name

Rubber fendering is a specification decision. The same berth can be served by several fender types, and the correct choice depends on vessel size, berthing energy, tidal variation, berth structure and operational conditions — with the rated deflection, reaction force tolerance and rubber compound confirmed against the project environment. Buying on product name alone is the most common source of mismatch.

For buyers comparing China rubber fender manufacturers for ports, the practical filter is evidence. Ask for the standard reference (ISO 17357-1:2014 for pneumatic fenders, PIANC-based design for solid rubber types), the inspection regime, the material and coating documentation, the reference shipment list and the production lead time in writing. Suppliers who can answer all five are the ones worth shortlisting.