A rail fish plate is a steel joint bar installed at the rail web to reconnect two rail ends so that structural continuity is restored at a mechanical joint. It enables the joint area to carry vertical loads, lateral forces, and bending stresses as part of the rail system. GNEE RAIL supplies fish plates for GB 8–60 kg/m rails, UIC50/UIC54/UIC60, DIN536 A55–A120 crane rails, QU70/80/100/120, JIS rail profiles, AS1085 rails, BS11 sections, and AREMA/ASCE standards, with full joint matching service.

8 Different Types of Rail Joints

1.Standard Rail Joints: Basic Components

Standard rail joints, or fishplates, are essential components that connect adjacent rail ends, providing structural continuity for safety and stability. Comprising steel bars, bolts, and washers, they manage thermal expansion/contraction, withstand loads, and allow for smooth train movement, typically classified by hole count (4 or 6) or standards like AREMA, UIC, or GB.

2.Insulated Joints: Circuit Safety

Insulated joints (IJs) are critical railway track components that connect rail ends while providing electrical isolation to support signaling, train detection, and traction power segmentation. They prevent short-circuiting between rail blocks, commonly using glued, high-strength insulated fishplates (joint bars), insulation end posts, and bolts.

3.Frozen Joints: Thermal Locking

A.Normal frozen joints.

B.New-type frozen joints.

A frozen rail joint is a type of track connection where high-strength bolts and specific fastening techniques are used to firmly lock rail ends together, preventing longitudinal movement and maintaining a tight, consistent gap. These joints, often used in urban rail transit or specific track, rely on high friction to eliminate thermal expansion/contraction at that specific point.

4.Bonded Rail Joints: Seamless Integration

Bonded rail joints (or bonded insulated joints) are specialized rail connectors that securely join two rail ends while providing high-strength electrical insulation, primarily used in continuously welded rail (CWR) tracks for signaling systems. They use epoxy resin, insulation materials, and specialized bolts/pins to eliminate electrical current flow, improve structural integrity, and provide a smooth, impact-free transition.

5. Special-Shaped Joints: Transition Solutions

Special-shaped rail joints, primarily known as compromise joints or compromise joint bars, are specialized rail connectors designed to join two different types, sizes, or worn profiles of rails. They are forged or machined to have different cross-sectional dimensions at each end, ensuring smooth, safe transitions in rail gauge and height, often used at switches, turnouts, and for repairs.

6.Expansion Joints: Bridge Applications

Rail expansion joints (REJs) are specialized assemblies installed in railway tracks to safely accommodate the longitudinal expansion and contraction of rails caused by temperature changes, traffic loads, or bridge movements. They prevent track deformation, buckling (sun kinks), and rail breaks by allowing movement, typically placed on bridges or in long, welded rail sections.

7.Vibration-Damping Joints: Noise Control

Rail vibration-damping joints (also known as rail dampers or vibration-damping bearings) are specialized components installed on railway tracks to absorb noise and vibrations generated by passing trains. By utilizing damping materials-often rubber profiles on the rail waist-they reduce noise, minimize track fatigue, and ensure smoother transitions between rail sections.

8.Welded Rail Joints: CWR Technology

Welded rail joints are engineered, fused connections between railway rail ends, creating a continuous, smooth, and seamless track (often referred to as CWR - Continuous Welded Rails). These joints, formed through methods like flash-butt or thermite welding, eliminate the traditional bolt-and-fishplate gaps, which reduces maintenance, noise, and vibration while enhancing train speed and safety.

Specifications of Various Standards of Railway Fish Plate

Railway fish plates, or joint bars, are crucial components that connect rail ends, with specifications defined by weight, material strength, and hole patterns. Key standards include AREMA (USA), BS (British), UIC (International), and Chinese standards (GB), generally featuring lengths of 600-1000mm, 4-6 holes, and tensile strengths of 600-900 MPa. They are typically manufactured from high-quality carbon steel, such as 45# or 50# steel, ensuring structural integrity.

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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