What is standard fish plate in railway?

What is standard fish plate in railway?

A standard fish plate, also known as a splice bar or joint bar, is a metal plate designed to connect two rails end-to-end, maintaining alignment and structural integrity. Used in pairs on either side of the rail web, they ensure continuous support on straight, non-insulated tracks, typically secured by four or six bolts.

GNEE RAIL supplies fish plates for GB 8–60 kg/m rails, UIC50–UIC60, DIN536 A-series crane rails, QU crane rails, JIS standards, AS1085 rails, BS11 profiles, and AREMA/ASCE sections, and supports customers with joint layout optimization.

Key Details and Usage Examples:

• Purpose: Connects rail ends to ensure smooth passage, manages thermal expansion/contraction, and provides vertical/lateral stiffness.

• Common Usage: Used for connecting identical rail sections (e.g., 60 kg, 52 kg, 90 R, UIC 60) on standard tracks.

• Applications: Employed on mainlines, commuter paths, light rails, and sidings.

• Structure: Features multiple bolt holes (usually 4 or 6) and is made from high-strength steel.

• Synonyms: Splice bar, joint bar.

What is the difference between a standard fish plate and an insulated rail joint?

Standard fish plates are metal components designed to physically connect rail ends, offering high strength and electrical conductivity. In contrast, insulated rail joints are specialized, non-conductive, and non-magnetic components-often made of composites or thermosetting materials-used to electrically isolate track sections for signaling and to prevent electrical leakage.

Key Differences and Usage Examples:

• Material and Conductivity: Standard fish plates are typically steel. Insulated joints use composite materials, fiberglass, or epoxy resin to prevent current flow.

• Purpose: Standard plates ensure structural continuity. Insulated joints prevent electrical interference and are crucial for electrified tracks or track circuits.

Application Examples:

• Standard: General, heavy-haul, and conventional railway tracks.

• Insulated: Metro lines, signal-controlled tracks, and railway switches.

• Installation: Insulated joints require insulating end posts between rail ends and insulating bushes/plates to prevent bolts from touching the metal rail.

What are the different standards for rail joint bars?

Rail joint bars (or fish plates/splice bars) are standardized by international (UIC, BS, DIN) and regional specifications (AREMA, GB) to connect rails of similar or different sizes. Key standards include UIC60/54 (heavy/high-speed), AREMA 115-132RE (common in North America), and various light/crane rail types (e.g., QU70-120). These are used in standard (bolted), compromised, or insulated rail applications.

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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