- Based on the ultrasonic immersion testing principle.
- Ultrasonic sound wave is generated from a concave probe and transmitted into the 45° mirror mounted in a turbine, which reflect the sound wave to the tube wall.
- Pressurized water is being used as couplant and rotates the turbine.
- While the turbine rotates, it collects data around the 360° circumference of the tube.
- Measures exact remaining wall thickness and also online C-Scan presentation.
- C-Scan is helpful to identify the thickness variation immediately.
ADVANTAGES
- Only technique that gives exact tube wall thickness.
- Provide information on flaw profile: either ID flaw or OD flaw.
- With real-time C-scan capabilities during data collection.
RESULTS
- Provide data of full length of a tube.
- Provide report in exact remaining wall thickness
- Identify the type of flaw indication such as localized wall loss, gradual corrosion and pitting.
- Indication of OD flaw or ID flaw.
Application of IRIS
- Generally for inspection of heat exchanger, boiler tubes and pipe lines for measurement of wall thinning and pitting due to corrosion.
- Able to indicate the reduction in wall thickness taking place either in an outer diameter or inner diameter or from both sides.
- It reveals both uniform corrosion and localized pitting corrosion.
- Can inspect tube wall thickness from 0.8mm.
- Can inspect 100 – 150 tubes per day depends on the tubes condition.
- Pulling speed is 0.3m/s
