A rail fish plate is a steel joint bar that enables smooth stress transition between rail segments, reducing wheel impact and improving ride quality on jointed track. GNEE RAIL manufactures fish plates for GB 8–60 kg/m, UIC50–UIC60, DIN536 A55–A120, QU70–QU120, JIS rails, AS1085 rails, BS11 profiles, and AREMA/ASCE rails.
| 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 function of a rail joint bar?
A rail joint bar (or fishplate) is a metal component that connects two rail ends to create a secure, continuous, and aligned track. Its primary functions include maintaining proper gauge, supporting vertical and lateral loads to ensure smooth train movement, and allowing for thermal expansion and contraction.
Key functions include:
- Connecting Rails: Joins two rail ends securely together, often using bolts and nuts to create a continuous track.
- Maintaining Alignment: Ensures both rail ends stay at the same height and horizontal position to provide a smooth, stable surface for train wheels.
- Load Distribution: Distributes the weight of trains across the rail joints, which reduces stress and prevents damage.
- Thermal Regulation: Enables the expansion and contraction of rails due to temperature variations.
- Specialized Types: Certain bars are designed to provide electrical insulation (insulated joints) or join different rail sizes (compromise joints).
- Rail joint bars are essential for safety and structural continuity in railway infrastructure.
How to do maintenance for rail joints ?
Rail joint maintenance involves regular inspections, cleaning, lubrication of fishing planes, and tightening or replacing fish bolts to ensure structural integrity. Key tasks include adjusting rail gaps, tamping ballast to prevent dipping, and using grinding to eliminate surface irregularities. Proper maintenance requires torque wrenches, matching fasteners, and checking for cracks or corrosion.
- Inspection: Regularly check for loose fish plates, cracks, corrosion, and wear, especially in spring and autumn.
- Tightening Bolts: Use a torque wrench to tighten fish bolts to the specified torque to maintain proper tension.
- Lubrication: Apply lubricant (e.g., a mix of plumbago and kerosene) to the fishing planes (where the fish plate touches the rail) to reduce friction and allow for expansion.
- Rail Gap Adjustment: Maintain the correct gap (typically within 8mm) to accommodate thermal expansion.
- Ballast Tamping: Clean and compact the ballast around the joints to ensure proper support and drainage.
- Surface Correction: Use rail grinding to remove surface unevenness and metal flow, and use hydraulic jacks to fix dipped joints.
- Replacing Components: Immediately replace broken bolts or worn fish plates.
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.
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