Inspection Protocols for Rail Fastening Systems

Regular inspections prevent derailments and track failures.

Frequency:

Daily: Visual checks for loose components in high-traffic zones.

Monthly: Detailed inspections using ultrasonic or eddy current tools.

Key Inspection Points:

Clip Tension: Measure with a tension gauge (e.g., minimum 8 kN for SKL-12 clips).

Corrosion: Check for rust on clips/baseplates, especially in coastal areas.

Pad Condition: Cracks/hardening in rubber pads indicate replacement need.

Gauge Width: Use digital calipers; deviation >3mm requires adjustment.

Advanced Methods:

Drones: Capture thermal images to detect loose fasteners.

AI Cameras: Mounted on inspection trains identify worn clips at 120 km/h.