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IRIS Instruments

 

Super IRIS (SIRIS) system now available for distribution worldwide:

Super Iris Technology

 

IRIS (Internal Rotary Inspection System: originally developed by Shell Developments in the 1980's) is an ultrasonic technique that for many years has been applied on both ferrous and non-ferrous materials and even on non-conductive materials like plastics. In clean tubes, IRIS measures the remaining wall thickness with extreme precision.

IRIS is more accurate than other tube inspection techniques and has the advantage of presenting information about the geometry of defects. Local defects and wall-loss on both sides of the tube can be accurately measured. Defects under support plates can be measured without any limitations.

 

 

Our new Super-IRIS ("SIRIS) units are designed to be ideal for inspections of Heat Exchangers Condensers and Chiller tubes. The Super-IRIS is manufactured by our partner Dacon Inspection Services at their research and development center in Asia.

 

The Super-IRIS provides unparalleled data sampling rates, with live C-scan and easy to operate auto analyzing software and tube mapping, as some of the enhancements.

 

Theory

 

The probe used in SIRIS examination is made up of a centering device, an ultrasound transducer and a rotating mirror (as pictured below). An ultrasound pulse is generated in the transducer that is mounted on the centre axis. A 45 degree rotating mirror in the probe guides the ultrasound towards the tube wall.

An ultrasound reflection (echo) takes place at the inner and outer walls of the tube. These echoes are reflected back and processed by the equipment. The time between the two echoes represents the wall thickness of the tube.

Knowing the sound velocity in the material under test, the wall thickness can be calculated. Water is used rotate the probe mirror and is also needed as a couplant between the transducer and the tube wall.

 

A calibration standard of the same material and dimensions as the tubes to be examined is used to check the IRIS system response.

 

After an inspection an on-site report detailing the condition of each tube is normally presented to the client, including a colour tube sheet map of tubes inspected.

 

For more information, and for services in Asia and vicinity, contact: http://dacon-inspection.com/

 

 

Heat Exchanger Bundle  Assembling SIRIS centralizers  SIRIS centralizers for H/E and Boiler tubes 

Heat Exchanger Bundle

 


 

Assembling SIRIS centralizers

 


 

SIRIS centralizers for H/E and Boiler tubes

 


 

 Inserting SIRIS Probe in H/E tube  Super Iris Technology  

Inserting SIRIS Probe in H/E tube

 


 

SIRIS "on the job"

 


 

 
 Dacon's IRIS-PIG (DPAT)

Screen Capture above shows data from Dacon's IRIS-PIG (DPAT). It is very similar to SIRIS data, but covers much longer distances.

IRIS PIG is available as a service to inspect pipelines from 4" to 48" diameter. For more info: info@russelltech.com