A rail fish plate is a joint reinforcement element designed to compensate for the loss of stiffness at rail gaps by converting two separate rail lengths into a structurally cooperative unit capable of carrying repeated axle loads. GNEE RAIL provides fish plates suitable for GB rails, UIC profiles, DIN536 and QU crane rail systems, JIS rail types, AS1085 rails, BS11 standards, and AREMA/ASCE rail sections, with optional corrosion-resistant surface treatments.
| Standard | Type | Length/Diameter | Weight /Material | |
| AREMA 2007 | 115RE | 4 hole-24" | 17.04Kg | 45# chemical |
| 115RE | 6 hole-36" | 25.56Kg | composition(%): | |
| 132-136RE | 4 hole-24" | 17.75Kg | C: 0.42-0.50 | |
| 132-136RE | 6 hole-36" | 26.63Kg | Mn: 0.50-0.80 | |
| UIC864 | UIC60 | 4 hole-630/Φ26 | 18.07Kg | Si: 0.17-0.37 |
| UIC60 | 4 hole-600/Φ28 | 17.47Kg | Cr: ≤0.25 | |
| UIC60 | 4 hole-630/Φ25 | 18.1Kg | P: ≤0.035 | |
| UIC54 | 4 hole | 14.34Kg | S: ≤0.035 | |
| UIC54 | 6 hole-800 | 19.94Kg | ||
| BS 47-1 | BS75R | 4 hole | 6.56Kg | |
| BS60A | 4 hole | 5.61Kg | ||
| BS80A | 4 hole | 6.5Kg | ||
| BS90A | 685.8/Φ26 | 13.23Kg | 50# chemical | |
| BS90A | 792.9/Φ26.2 | 15.34Kg | composition(%): | |
| BS100A | 4 hole | C: 0.62-0.70 | ||
| 90/91LB | 4 hole | 18.08Kg | Mn: 0.50-0.80 | |
| 90/91LB | 6 hole | 19.9Kg | Si: 0.17-0.37 | |
| AS | 50kg | 4 hole | 14.3Kg | Cr: ≤0.25 |
| 50kg | 6 hole | 19.5Kg | P: ≤0.035 | |
| S49 | 4 hole | 9.71Kg | S: ≤0.035 | |
What is the rail insulation joint?
An insulated rail joint (IRJ) is a specialized, safety-critical railway component used to connect rail ends while preventing electrical current from flowing between them. By separating track circuits for signaling, it allows for train position monitoring, usually consisting of reinforced insulating plates, end posts, and high-strength bolts.
- Purpose: Essential for track circuits that control signaling and identify broken rails, often used at turnouts, switches, and within continuously welded rails (CWR).
- Glued Insulated Joints: These use specialized adhesive to join rails, providing high strength, longevity, and stability, often used in high-speed or heavy-haul lines.
- Components: Constructed using steel or polymer composite insulating materials to isolate metallic components.
- Types: Available as bonded (factory-made) or assembled on-site, including options for various rail profiles.
What is the insulation resistance of a glued joint?
The insulation resistance of a new glued insulated rail joint (IRJ) typically exceeds 10-25 mega-ohms (MΩ) when measured in dry conditions with 100V DC. Under wet conditions, the resistance should not fall below 3 kilo-ohms (kΩ). These joints are used to electrically isolate rail sections for signaling circuits, ensuring high, stable resistance.
Key Aspects of Glued Joint Insulation Resistance
- Dry Condition Resistance: Before installation, resistance should be at least 10–25 MΩ (some specifications require over 30 MΩ or even 70 MΩ).
- Wet Condition Resistance: Following a 48-hour water immersion test, the insulation resistance must not be less than 3 kΩ.
- Measurement Technique: Tested using a 100V DC insulation tester (megger) applied across the end post and between fish bolts/rails.
- Components Involved: The insulation is maintained by specialized resin adhesive, fiberglass side channels, bushes, and end posts, ensuring electrical isolation even under high-speed traffic (up to 250 km/h).
| Key Aspect | Specification / Condition |
|---|---|
| Typical Dry Condition Resistance | Exceeds 10–25 MΩ (some specifications require >30 MΩ or >70 MΩ). Measured with a 100V DC insulation tester (megger). |
| Minimum Wet Condition Resistance | Must not fall below 3 kΩ after a 48-hour water immersion test. |
| Measurement Technique | Tested with a 100V DC insulation tester (megger) across: 1. The end post and the rails. 2. Between fish bolts and the rails. |
| Insulation Components & Performance | Provided by specialized resin adhesive, fiberglass side channels, bushes, and end posts. Designed to maintain electrical isolation under high-speed traffic (up to 250 km/h). |
Founded in 2008, GNEE RAIL is a leading global manufacturer and supplier of railway components, specializing in high-quality rail fish plates (joint bars/splice bars) with strong production capacity and global service capabilities.
Our rail fish plate portfolio is comprehensive and compliant with international standards including UIC, AREMA, BS, DIN, and GB, covering light rail (8kg-30kg), heavy rail (38kg-75kg), and crane rail (QU70-QU120) systems. We offer diverse types such as insulated joint bars, bulged fish plates, and compromise rail joints,with precise specifications (4-hole/6-hole, 24-inch/36-inch), ensuring excellent mechanical performance.We uphold strict quality control supported by ISO 9001:2015 certification, an in-house inspection center, and third-party audits by SGS and BV. Our one-stop service includes customization, production, packaging, and after-sales support, tailored to clients' project needs.