Description
Technical Parameters
Railway Turnout (Railroad Switch) Technical Specifications
| Category | Specification | Standard/Reference |
|---|---|---|
| Types | - Single slip (60 kg/m rail) - Double slip (UIC 60) - Diamond crossing (90° angle) |
UIC 720, AREMA Fig.5-2-1 |
| Material | - Rails: R350HT head-hardened steel (EN 13674-1) - Frog: Mn13 austenitic steel (ASTM A128) - Baseplates: QT500-7 ductile iron (EN 1563) |
EN 13674, ASTM A128 |
| Geometric Parameters | - Turnout radius: 120m to 5000m - Maximum speed: • Main route: 220 km/h • Diverging route: 80 km/h |
UIC 720, TSI INF 130/2014 |
| Mechanical Properties | - Switch rail fatigue life: >3M cycles - Frog impact resistance: >150 kJ - Lateral stiffness: ≥50 kN/mm |
EN 13232-3, AREMA Ch.5 Sec.3 |
Turnout Types Comparison
| Type | Radius (m) | Max Speed (km/h) | Typical Use |
|---|---|---|---|
| #6 Turnout | 190 | 40 (diverging) | Freight yards |
| #12 Turnout | 350 | 80 (diverging) | Mainline passenger |
| #18 Turnout | 1200 | 160 (diverging) | High-speed junctions |
| Symmetric Turnout | 500 | 100 (both routes) | Equal-speed branching |
Critical Components Specifications
| Component | Material | Hardness | Service Life |
|---|---|---|---|
| Switch Rail | R350HT steel (EN 13674-1) | 340-380 HB | 15-20 years |
| Frog (Crossing) | Mn13 steel (ASTM A128) | 200-240 HB (work-hardened to ≥450 HB) | 8-12 years |
| Slide Chairs | ZG270-500 cast steel | 160-200 HB | 10-15 years |
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