Fastening System Fish Plates

Regional Standard

Model

Rail Profile Compatibility

Key Dimensions (mm)

Material Grade

Joint Strength (kN)

Corrosion Resistance

Service Life (Years)

GB/T 11265.1 (China)

FP-C60

UIC 60, GB 60kg/m Rail

Length: 300; Thickness: 20; Bolt Hole Spacing: 70

Q355B

≥800

Hot-dip galvanizing (≥85μm), ≥500h salt spray (no red rust)

15–20

AREMA (USA)

FP-A75

AREMA 75lb/yd Rail

Length: 350; Thickness: 22; Bolt Hole Spacing: 75

A572 Gr.50

≥950

Zinc-nickel plating (10–12μm), ≥400h salt spray (no red rust)

12–16

BS EN 13230-3 (EU)

FP-E50

BS 50kg/m Rail

Length: 280; Thickness: 18; Bolt Hole Spacing: 65

S355JR

≥750

Dacromet coating (15–20μm), ≥550h salt spray (no red rust)

14–18

JIS E 1107 (Japan)

FP-J60

JIS 60kg/m Rail

Length: 310; Thickness: 19; Bolt Hole Spacing: 68

SM490A

≥820

Zinc-aluminum coating (12–15μm), ≥580h salt spray (no red rust)

16–22

UIC 860 (Int'l)

FP-I54

UIC 54kg/m Rail

Length: 290; Thickness: 17; Bolt Hole Spacing: 62

S355NL

≥720

Epoxy powder coating (60–80μm), ≥520h salt spray (no red rust)

13–17

Operation Stage

Key Requirement

Common Issues

Troubleshooting Measures

Maintenance Interval

Quality Verification Method

Pre-Installation

1. Check fish plate flatness (deviation ≤0.5mm/m); 2. Clean rail joint surface (no rust/oil)

1. Fish plate deformation; 2. Rail joint rust

1. Replace deformed fish plate; 2. Derust with wire brush + anti-rust oil

-

1. Straightedge test (flatness); 2. Visual inspection (surface cleanliness)

Installation

1. Bolt tightening sequence: diagonal order; 2. Torque value: 350–400N·m (M24 bolt)

1. Uneven bolt torque; 2. Bolt hole misalignment

1. Re-tighten with torque wrench (follow sequence); 2. Adjust rail position (use jack)

-

1. Torque wrench calibration (before use); 2. Hole alignment test (gap ≤0.3mm)

Post-Installation

1. Check joint gap (≤1mm); 2. Inspect bolt tightness (weekly for 1 month)

1. Joint gap expansion (≥2mm); 2. Bolt loosening

1. Add shim plate (0.5–1mm thickness); 2. Retighten bolts to standard torque

1. Daily: Visual inspection; 2. Weekly: Torque check

1. Feeler gauge (joint gap); 2. Torque wrench (bolt tightness)

Long-Term Maintenance

1. Coating touch-up (when peeling ≥10%); 2. Replace worn fish plate (thickness reduction ≥2mm)

1. Coating peeling; 2. Fish plate wear

1. Touch-up with matching coating (e.g., zinc-nickel plating); 2. Replace with same-model fish plate

1. Monthly: Coating inspection; 2. Annual: Thickness measurement

1. Coating thickness gauge; 2. Ultrasonic thickness tester