Internal Rotary Inspection System (IRIS) 內旋轉超聲檢測系統


IRIS is an ultrasonic method used for the non-destructive testing of pipes and tubes.


Many plant operators in the oil, gas and power generation industries are faced with the challenges of maximising the efficiency and life expectancy of their assets but without sacrificing safety and reliability. Therefore accurate inspection of vital components such as pipes and tubes is crucial to ensuring the integrity of the plant. IRIS detection technology can solve this problem.


Internal Rotary Inspection System (IRIS) can detect corrosion, pitting and wall loss and is most commonly used for tube inspection in boilers, heat exchangers, air coolers and feed water heaters. It is particularly versatile as it is suitable for both ferrous and non-ferrous materials, and IRIS can be used on a wide range of tube diameters and wall thicknesses.

內部旋轉檢測系統 (IRIS) 可以檢測腐蝕、點蝕和壁厚損失,最常用于鍋爐、熱交換器、空氣冷卻器和管式反應器等的管束檢測。該技術通用性強,它幾乎適用于各種材質金屬材料,而且適用管徑和壁厚范圍也很廣。

An IRIS probe is inserted into a tube flooded with water. The probe is fitted with a transducer that generates an ultrasonic pulse along a path parallel to the axis of the tube. A rotating mirror directs the ultrasonic pulse into the tube wall. The mirror is driven by a small turbine that is rotated by the pressure of water pumped into the tube.


The ultrasound pulses are reflected by the inner-diameter (ID) wall and outer-diameter (OD) wall of the tube and the time of flight difference between the two diameters is used to calculate the wall’s thickness.


As the IRIS probe is pulled, the spinning motion of the mirror results in a helical scan path ensuring full coverage of the tube.


Benefits of using IRIS include:


Suitability for ferrous and non-ferrous materials


Detection of corrosion, pitting and wall loss


Accurate wall thickness measurements


Sensitivity to both internal and external defects


Defect position can be located in relation to tube length


100% coverage of the tube


Results data storage


Flexibility as a back-up to remote field, magnetic flux leakage and eddy current inspections


Our NDT inspectors have years of experience using IRIS and they can provide you with an accurate assessment of the condition of your assets and Total Quality Assurance.