Installation Methods of Railway Fastenings: Step-by-Step Process and Acceptance
1. What Is a Rail Fastening System?
The rail fastening system is an important part of the railroad track structure, composed of various rail fasteners (other track materials, OTM). Its main function is to firmly fix the rails on the sleepers or track plates, ensuring the stability of the rails, maintaining the track gauge, and absorbing dynamic loads from passing trains. Typical components include: screw spikes and clips and clamps, high-tensile bolts with nut and washer, base (tie) plates, fish plates, rail shoulders, rail screws, fish bolts with nut and washer, rail dowels, and rubber or EVA pads.
2. Fastening System Types
Common fastening systems include elastic clip systems (e.g. SKL-type and E-type clips used on concrete sleepers), clamp-type systems (e.g. KPO-type rail clamps) and wedge-type clip systems. Select the system according to the rail profile, sleeper type, axle load and design standard, and follow the system manufacturer's installation instructions for torque values, assembly order and inspection requirements.
3. Installation Steps
- Preparation: inspect the rails and sleepers to ensure there is no dirt or damage; get all the fastening tools ready (torque wrench, clip installation tool, gauges).
- Component assembly: assemble the parts in the correct order as specified by the design - baseplate, pad, rail, clip/shoulder, then fasteners.
- Tightening and adjustment: tighten the bolts using specialized equipment to guarantee that the fasteners provide sufficient gripping force; the track gauge is maintained by the baseplate and fastening-system design, so verify gauge after tightening.
- Testing and inspection: examine the track system thoroughly to make sure all fasteners are in place and secure; check toe load or torque against the specification.
4. Acceptance Criteria
- Fastener torque within the specified range (verify with a calibrated torque wrench).
- Clips fully seated with correct toe load; no visible gaps or distortion.
- Track gauge and rail alignment within tolerance after installation.
- Re-inspect after initial traffic cycles and re-tighten as required.
Request Fastening Specifications & Pricing
Proper railway fastening installation is essential for rail alignment, clamping force, track stability, and service life. Installation and acceptance should follow the specified rail profile, fastening system, torque requirements, and applicable standards. GNEE RAILWAY RAILWAYL supplies railway fastening systems and components for different track structures and project requirements.
