NR/L3/TRK/055/U17 ISSUE 2
Work Instructions for Ultrasonic Rail Testing: Ultrasonic Testing of the Rail Foot for Transverse Cracks Under the Web Using a Roller Search Unit
Organization: | NR |
Publication Date: | 3 December 2022 |
Status: | active |
Page Count: | 8 |
scope:
This technique applies to the following: - all pearlitic rails in plain line, switches & crossings (S&C), Adjustment Switches and welds, as far as coupling conditions allow.
This procedure is capable of detecting the following defect types that lie directly below the rail web:-
a) Transverse, vertical defects in the rail foot
b) Corrosion pitting of the rail foot
c) Transverse cracks in the rail foot at the pearlitic/stainless boundary of tri metallic welds
Purpose
This procedure applies when using a Roller Search Unit (RSU) for the detection of transverse rail flaws in the rail foot under the web.
Document History

