NBN EN 13231-3:2006

This part of this European Standard lays down the technical requirements and the measurements to be made for the acceptance of work to re-profile both longitudinally and transversely the heads of railway rails, including the parts of switches and crossings that can be reprofiled.
For acceptance purposes, two classes of longitudinal profile and three classes of transverse profile tolerance are defined.
It also informs about procedures to verify reference instruments to be used for these measurements and informs about a method to approve non-reference instruments to be used for measurements.
It applies to reprofiled vignole railway rails 40 kg/m and above.
A form of acceptance documentation that may be used is given in Annex C.