Agenda final-agenda_86-tsc-25-11-2016-highlighted held on 21-23 December 2016
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Please find the minutes-of-85tsc-highlighted 13 to 15th Nov 2014, Ernakulam
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Please Click the below text to download the Tolerances File
Nature of defects in welds:
Joining rails by improper welding may introduce a variety of
defects on the joints as well as in the heat affected zone (HAZ) e.g. lack of fusion, cracks,porosity, slag inclusion, structural variation, etc.
The quality of weld depends to a large extent on the careful execution of the welding operation. USFD testing done by manual rail tester suffers from following deficiencies:
(i) Full cross section of weld is not covered by normal USFD examination using manual tester thereby leaving areas in head and foot, which may have flaws.
(ii) Micro structural variations in the weldment cause attenuation of ultrasonic energy.