Detecting defective rail welds

By 2002-04-01T10:00:00

RADIOGRAPHIC non-destructive testing of aluminothermic welds is being carried out by AMEC under a £1m contract from Railtrack. Ultrasonic methods are unsuitable for analysing welds because of the heterogeneity of the metal, but radiography takes less than 30min to check a weld.

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