Rubber Fender FAQs for Maritime & Port Applications
For detailed technical parameters or project-specific solutions, contact our
engineering team at [[email protected]/+8615252789778].
Q1: What types of rubber fenders are available for marine use?
A: Common types include:
● Cylindrical Fenders (Y-Type): Low reaction force, suitable for general berthing with high adaptability to ship rolling.
● D-Type (Half-Round): Moderate reaction force, ideal for framed docks and ship sides.
● DA-Type: High energy absorption with low reaction force, often used in large ports.
● V-Type: High shear resistance, compact design for limited space.
● Pneumatic Fenders: Self-floating, high energy absorption, and low reaction force for ship-to-ship operations.
Q2: What makes rubber fenders suitable for harsh marine environments?
A: They are made from natural/synthetic rubber with additives for UV/oil resistance. Advanced designs include internal steel cores for stability and anti-corrosion coatings (e.g., epoxy resins).
Q3: How are rubber fenders installed?
A: ● Fixed Installation: Bolted to precast concrete with stainless steel anchors (torque: 300N·m ±5%).
● Floating Installation: Anchored via chains/ropes for ship-to-ship use.
● Key Checks: Surface cracks, anchor bolt tightness, and alignment during installation.
Q4: What maintenance is required?
A: ● Monthly: Visual inspection for cracks, UV damage, or mechanical wear.
● Quarterly: Check bolt tension and replace worn fenders if compression deformation exceeds 5%.
● Annual: Pressure testing for pneumatic fenders and recoating with anti-corrosion agents.
Q5: How to choose the right fender?
A: ● Ship Size/Tonnage: Larger vessels require high-absorption fenders (e.g., DA-Type for 5,000–8,000 DWT).
● Dock Structure: Framed docks need D/V-Type; solid quays use Y-Type.
● Environmental Factors: Salinity, temperature, and tidal ranges influence material selection.
Q6: What are the key performance metrics?
A: ● Energy Absorption (E): Measured in kJ/m³ (e.g., DA-Type: 150–200 kJ/m³).
● Reaction Force (R): Should be ≤ dock structure's bearing capacity.
● Compression Ratio: Up to 70% for cone-type fenders.
Q7: Which standards do your fenders meet?
A: ● ISO 17357: For pneumatic fenders.
● HG/T 2866: Chinese standard for solid rubber fenders.
● IMO MSC.333(90): Safety guidelines for maritime fenders.
Q8: Do you provide certification?
A: Yes, including CCS, BV, DNV, and SGS reports for material and performance.
Q9: Common issues and solutions?
A: ● Cracks/Blisters: Replace if depth >2mm; avoid sharp objects near fenders.
● Loose Bolts: Retighten to 300N·m and apply anti-corrosion paint.
● Overheating: Ensure proper ventilation during installation.
Q10: What is the typical lifespan?
A: 10–15 years with proper maintenance. Aging signs include hardness changes (>10%) or surface cracking.
Q11: Can fenders be customized?
A: Yes, for size, shape, and material (e.g., recycled rubber for cost efficiency). We also offer UHMWPE padding for abrasion resistance.
Q12: Warranty & after-sales?
A: 24-month warranty. Free replacement for defects. 24/7 technical support via email/phone.