International Sugar Journal

Phased-array ultrasonic testing (PAUT) in lieu of radiography (RT) on small-bore boiler tubes* [Full subscriber]

Abstract         Radiography of convection bank tube welds and other pressure part welds has been the industry go-to method for many years.  However, production rates are slow and there are many occupational health and safety issues to be managed, often requiring temporary evacuation of the site during radiography events or restricting radiography to out of normal hours.  Fabrication codes and standards across the world have recognised other non-destructive testing methods to quantify the integrity and soundness of weldments, especially ultrasonic techniques when looking for internal imperfections or defects in materials and weld configurations.  These have proven very reliable within the pressure-equipment…

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