Rail shape specifications The length and other geometric dimensions and tolerances of the size specifications of the steel rail are specified by the corresponding standards for light and heavy rails in "8". Appearance quality (1) The rolled steel rail should be straight and free from significant bending and twisting. The local bending and torsion of light and heavy rails, as well as their corrected deformation, as well as the inclination of the rail end face, shall not exceed the standard regulations. (2) The surface of the steel rail should be clean and smooth, without defects such as cracks, scars, scratches, etc; The end face should not have shrinkage marks or interlayers. The allowable defects and their geometric quantities on the overall surface of light and heavy rails shall not exceed the standards
