In-service automated UT corrosion mapping of pipeline at risk of sulfidation
A solution was sought by IRISNDT, a global supplier of integrity, inspection and engineering services, for an automated corrosion mapping of a high-temperature hydrocarbon pipeline susceptible to sulfidation.
Automated UT is a primary means of determining areas of accelerated corrosion from sulfidation, as it the most ubiquitous damage mechanism from naturally occurring sulphur compounds in hydrocarbon products when in contact with low alloy or carbon steel components above a critical temperature of ~260 °C / 500 °F. Remaining wall thickness measurements were required to made on a number of identified piping circuits on a refinery and
required the use of UT transducers which were able to produce reliable
scans with sufficient wear resistance to survive maximise productivity over the length of the circuits
