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Track materials Rails Profile tolerances and Rectitude for vignol rails Page: 211-09 Profile limit deviations (tolerances) and straightness for vignol rails from 46 kg/m The profile classes X and Y define according to DIN EN 13674:2008-01 the profile limit deviations. As per the requirements of high-speed rail line (> 160 km/h) refers to the profile class X, while the class Y is tangent to the normal rail lines. Profile class (measurement in mm) X Y ± 0.5 + 0.5 / - 1.0 ± 0.6 + 0.6 / -1.1 ± 0.5 + 0.6 / - 0.5 ± 1.2 ± 1.2 + 1.0/ - 0.5 + 1.0 / - 0.5 ± 1.0 + 1.5 / - 1.0 + 0.75/ - 0.5 + 0.75/ - 0.5 max. 0.3 max. 0.3 Rail height Width of the rail head Rail symmetry Web thickness Width of rail foot Rail foot thickness Concavity on the rail foot < 165 mm ≥ 165 mm For straightness the classes A and B are fixed. A for the high-speed rail lines (> 160 km/h), B for the normal rail lines. Then the straightness of the rail body (between the ends) is for the classes A to 0.3 mm < 3 m, for class B to 0.4 mm < 3 m. Perpendicularity of the rail ends (0.6 mm in all directions) Length tolerance of the rails Length drilled on both sides L ≤ 24 m L > 24 m L ≤ 40 m ± 3 mm ± 4 mm ± 4 mm For other lengths (without holes) or with holes at one end of ± 1 mm/m rail (max. ± 30 mm on the rail length). The limit deviations in rails are for particular applications without holes up to 24 m long ± 6 mm, in rails greater than 24 m length ± 10 mm. The specified rail lengths apply to +15 °C. If measurements are performed at different temperatures, expansions or contractions are to be considered by corrections. Without scale/schematic diagram Date of issue 08/10