How to select the appropriate Rubber Rail Pads for a railway project?
To select the right rubber rail pads, consider the train's speed and weight, environmental conditions, and the fastening system specifications to determine the appropriate material, thickness, and hardness. Key factors include using high-density pads for heavy loads, appropriate materials like natural rubber or EPDM for specific climates (e.g., high-speed rail, cold regions), and ensuring the pad's specifications align with the fastening system's requirements.
| Rubber Rail Pad | ||
| Technical Parameter | Unit | Value |
| Stiffness | KN | 90-130 |
| Hardness Shore A | ℃ | 72-80 degree |
| Electronic Resistance | Ω | ≥ 106 |
| Tensile Strength before Aging | Mpa | ≥12.5 |
| Elongation before Aging | % | ≥250 |
Key factors to consider
Train speed and weight:
- Thicker pads are better for heavier loads and high-impact resistance.
- High-speed rail requires pads with good shock absorption, often natural rubber pads.
Environmental conditions:
- Cold regions: Choose materials with good low-temperature toughness to prevent brittle cracking, such as specific rubber compounds.
- Humid and coastal areas: Use materials with high salt spray resistance, such as Chloroprene Rubber + Carbon Fiber (CR+CF) composite pads.
- Rainy areas: Select grooved pads with excellent drainage to prevent water accumulation.
- General environment: EPDM rubber is suitable for areas with extreme temperature differences.
Fastening system specifications:
- Always refer to the manufacturer's specifications for the rail fastening system.
- Ensure the pad's material, hardness, and thickness are compatible with the baseplates, clips, and overall system design.
Performance requirements:
- Vibration and noise: Pads with good vibration damping are crucial for noise reduction and protecting track components.
- Durability: Select high-density rubber for long life and to reduce the need for frequent repairs.
- Electrical insulation: In certain applications, the pad's electrical insulation performance is a critical consideration.
Material selection:
- Natural Rubber (NR): Suitable for conventional railways and high-speed rail due to its shock absorption.
- EPDM: Good for extreme temperature variations.
- Chloroprene Rubber (CR) + Carbon Fiber (CF): Ideal for coastal areas with high salt spray.
- Polyurethane (PU): Used for superior wear resistance in some applications.
- Cork-rubber composites: Offer a blend of compressibility, damping, and mechanical strength.
Quality and compliance:
- Ensure compliance with relevant international standards, such as EN 13103 or AAR M-107.
- Request independent lab testing reports to validate performance metrics like vibration damping efficiency and compression set resistance.
As a professional rail fastener manufacturer, GNEE RAIL can produce various types of rubber rail pads with different materials, such as natural rubber, EVA, HDPE and so on. Our EVA/HDPE/rubber rail pads are with high elasticity, applying to types for rails such as rail UIC54, UIC60, BS80lbs,BS100lbs, and sizes as ordered. The pads can be customized with or without grooves, in various possible designs, depending on customers' requirements.
