Internal Rotary Inspection (IRIS)
Internal rotary inspection system (IRIS) is an ultrasonic method for the nondestructive testing of pipes... View more
Internal rotary inspection system (IRIS) is an ultrasonic method for the nondestructive testing of pipes and tubes. The IRIS probe is inserted into a tube that is flooded with water, and the probe is pulled out slowly as the data is displayed and recorded. The ultrasonic beam allows detection of metal loss from the inside and outside of the tube wall.
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However, tube inspection with IRIS has the following limitations: Heat exchanger tubes must be flooded with filtered water making the inspection setup complex and difficult to use. It is sensitive to ID / OD deposits and fins, which are not defects. It is unable to detect cracking.
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