Räls och rälsdelar

This document specifies Vignole railway rails of 46 kg/m and greater linear mass, for conventional and high speed railway track usage.
Pearlitic steel grades are specified covering a hardness range of 200 HBW to 440 HBW and include non heat treated non alloy steels, non heat treated alloy steels, and heat treated non alloy steels and heat treated alloy steels.
There are 24 rail profiles specified in this document.
Two classes of rail straightness are specified, differing in requirements for straightness, surface flatness and crown profile. Two classes of profile tolerances are specified.

This document only applies to continuous testing of rails installed in track for detecting internal discontinuities.
This document only applies to testing equipment fitted to dedicated test vehicles or manually-propelled devices. This document treats welded joints as plain rail.
This document does not define the requirements for vehicle acceptance. This document does not apply to ultrasonic testing of rails in a production plant.
This document specifies the requirements for testing principles and systems in order to produce comparable results with regard to location, type and size of discontinuities in rails. This document is not aiming to give any guidelines for managing the result of ultrasonic rail testing. This document only
applies to flat bottom (Vignole) railway rail profile 43 kg/m and above.