Immersion Ultrasonic Testing

Immersion Ultrasonic Testing

IRIS is an ultrasonic method to detect discontinuities in pipes and tubes.

In oil and gas industries and power plants, many operators face a challenge regarding maximizing the efficiency and life expectancy of the equipment without having any adverse effect on safety and reliability. Hence accurate inspection must be carried out of vital components such as pipes and tubes is crucial for the smooth running of the plant.
IRIS (Internal rotary inspection system) can detect discontinuities such as corrosion, pitting, erosion, in various devices such as tubes in boilers, heat exchangers, air coolers, feedwater heaters. Hence the biggest advantage is the variety of uses as it can be used on materials that are ferrous and non-ferrous with a wide range of tube diameters and thickness.  
An IRIS probe is flooded with water. This probe has a housing of an ultrasonic crystal along the axis of the tube. There is a rotating mirror that directs ultrasonic waves in the tube wall. This mirror is rotated by a small turbine which is rotated by water pressure in pipes.
The ultrasound sound is reflected from the inner diameter (ID) wall and outer-diameter (OD) of the tube wall and the time of flight difference (TOFD) between the two diameters is used to measure the wall’s thickness.
As the probe is pulled, the spinning of the mirror results in a helical scan that helps in the complete scan of the tube.

Benefits of using IRIS include:

• Suitable for most materials such as ferrous and non-ferrous.
• Accurate thickness measurements of the wall.
• Detection of corrosion, pitting, and wall loss.
• Both internal and external defects can be detected.
• The defect position can be located relative to the tube’s length.
• Full coverage of the tube.
• Data on the result can be stored.

Our inspectors have years of experience using IRIS and TOFD systems as they can provide you with an accurate assessment of the condition of your equipment and systems.

Immersion Ultrasonic Testing (UT) is used for the detection of internal discontinuities and defects.

Immersion ultrasonic testing, a type of advanced ultrasonic testing (UT), is more effective than manual testing it offers a better probability of detection of small defects and it does provide you with accurate reporting of the defect size, location of subsurface discontinuities in materials.      
In the highly precise field of immersion ultrasonic testing, ANDT uses the latest in semi-automated and fully automated inspection systems. Our NDT inspectors are ASNT level 2 and 3 qualified and are highly experienced in using immersion ultrasonic testing technique.
ANDT specializes in using immersion ultrasonic testing for the pipe fittings, aerospace, power industries, automobile sectors to inspect various materials and components. However, the technique is also suitable for use in many other industrial and manufacturing sectors.
Usually, in ultrasonic testing, a couplent is applied between the transducer and the test object such as oil, water, gel, and glycerin then the probe is manually moved on the surface. With immersion, the testing part is submerged in water or any other suitable liquid this allows better sound travel while maintaining a constant distance between probe and test piece. We can provide real-time and post-scan data and provide ’A’, ‘B’, ‘C’ scan. This allows us to detect discontinuities to most demanding industrial standards.

ANDT’s immersion ultrasonic testing can help you in ensuring the safety and reliability of the components, this helps our customers to follow the most stringent industry standards.  

For more details, you can contact on info@andt.co.in 

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