A rail fish plate is a joint structural component that enables two rail lengths to function as a continuous beam by transmitting vertical, lateral, and longitudinal forces through bolted connections, extending the service life of jointed track. GNEE RAILWAY RAILWAY supplies fish plates covering GB 8–60 kg/m, UIC50/54/60, DIN536 A55–A120, QU70/80/100/120, JIS rail models, AS1085 rails, BS11 standards, and AREMA/ASCE profiles, with full technical support for jointed rail systems.
What Is the Lifespan of a Typical Fish Plate?
A typical rail fish plate, also known as a joint bar or splice bar, generally has a functional lifespan of 10 to 20 years, though this can vary from 5 years on high-traffic, high-wear routes to over 30 years in low-usage areas. Lifespan is heavily influenced by maintenance, such as tightening bolts every 3–6 months, corrosion, traffic frequency, and curvature.
Key Details on Fish Plate Lifespan and Usage:
- Average Lifespan: While some heavy-duty, well-maintained plates can last up to 20 years, high-impact areas (e.g., heavy freight lines) often require replacement every 5–10 years due to bolt hole cracking, fracturing, or bolt failure.
- Factors Reducing Life: High-speed passenger lines and heavy-haul freight corridors (25+ tonne axle loads) create significant joint impact loads, which can destroy fish-plated joints faster than continuous welded rails.
- Maintenance Requirements: To ensure maximum lifespan, fish plates require consistent maintenance, including regular inspections (at least annually, or every few months in high-traffic areas) and bolt tightening (every 3-6 months).
Usage Examples:
- High-Traffic Freight: Replaced every 5-10 years due to rapid wear.
- Low-Traffic/Siding: May last 20+ years.
- High-Speed Rail: Requires superior maintenance or is replaced by welded joints to avoid damage, as joints cause rapid deterioration.
Types of Rail Joint
Rail joints are crucial components that connect rail ends, ensuring continuity, safety, and allowing for thermal expansion. Main types include supported, suspended, and bridge joints based on sleeper position; common, insulated, and compromise joints based on function; and welded or fish-plated (bolted) types based on installation method.
| Joint Type | Key Specification / Description |
|---|---|
| Standard Rail Joint (Fish Plate) | - Profile: Matches the rail section (e.g., UIC 60, 136RE). - Length: Typically 600mm or 800mm per side. - Holes: 4 or 6 bolt holes per bar. |
| Insulated Rail Joint (IRJ) | - Material: Steel core with composite insulating end-posts/plates, or full epoxy composite. - Electrical Resistance: >10⁸ Ω. |
| Compromise Rail Joint | - Design: Connects two different rail profiles (e.g., UIC 54 to UIC 60). - Profile: Each side is machined to match its respective rail section. |
| Joggled Rail Joint | - Feature: Has a depressed (joggled) section to allow continuous rail head surface for smoother wheel passage. |
| Bridge Rail Joint | - Design: Often reinforced (thicker web/longer length) for high-stress locations like bridge approaches. |
| Glued Insulated Joint | - Construction: Steel bars bonded to composite insulation using high-strength adhesive for improved durability. |
| Welded Rail Joint (for CWR) | - Type: Flash-butt or thermite weld. - Specification: Weld must meet mechanical properties equal to or greater than the parent rail. |
| Expansion Joint (for BRE) | - Feature: Allows controlled thermal expansion in long rails on bridges or in extreme temperature zones. |
Founded in 2008, GNEE RAILWAY RAILWAY 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.
| 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 | |
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.