What is IRIS method?

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.

How do you test iris?

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.

What is IRIS test for heat Exchanger?

Internal Rotary Inspection System (IRIS) Ultrasonic Inspections of Heat Exchanger Tubes. IRISNDT uses IRIS to detect general corrosion/erosion and localized volumetric defects such as pitting, fretting, and others in ferrous (carbon steel tubes such as SA214 and SA179 tubes) and non-ferrous (stainless steel) tubes.

How does iris invigilation work?

How does Iris work? IRIS records video of the students face throughout their proctored exam tracking head and eye movement. IRIS records the audio from the student computer’s microphone video from their webcam, and takes successive screenshots of what the student is seeing on their computer screen.

What is an iris out shot?

An iris shot is a technique frequently used in silent film in which a black circle closes to end a scene. An iris out is used at the end of a scene, and an iris in is used at the start of a scene, often after a previous iris out.

How does iris detect cheating?

IRIS records live footage and audio from the student’s computer’s microphone and video from their webcam and takes continuous screenshots of what the student sees on their computer screen. Facial markers are identified and monitored; classifying and differentiating innocent behaviors from dishonest behaviors.

How does iris invigilation system work?

What is eddy current testing of tubes?

Eddy current testing is a non-destructive testing method widely used to examine tubing in heat exchangers, steam generators, condensers, air coolers and feedwater heaters. The technique is applied to detect corrosion, pitting, cracks, erosion and other changes to both the tube’s interior and exterior surfaces.

How do you inspect a heat exchanger?

Inspect the interior of heat exchanger with mirror and flashlight check for evidence of water indicating a crack, rust perforation or crimp leak. Then there may be times you just need to pull the heat exchanger and fill it with water just to verify where the leak is at.

How does Iris work in a test tube?

IRIS relies on a transducer to generate an ultrasonic pulse parallel to the axis of the tube under test. It also relies on a rotating mirror that directs the ultrasonic wave into the tube wall. The mirror is driven by a small turbine powered by the pressure of water pumped into the tube.

What kind of inspection company is Iris inspection services?

Iris Inspection Services® is a tubing inspection specialty company providing comprehensive inspection support to the petrochemical industry, from upstream to downstream, chemical, and power plants. Our customer service, reliability, dedication, and professionalism are unsurpassed.

Which is faster iris or eddy current inspection?

Inspection speed is typically 2 to 4 inches/sec. IRIS requires the tubes to be thoroughly cleaned for ultrasonic coupling. Both techniques have their advantages and limitations. Following data compares the performance of Eddy Current Testing (ECT) and Ultrasonic IRIS for inspection of heat exchanger tubes.

Why does Iris require a couplant to work?

Because IRIS is an ultrasonic technique, it requires a couplant. In this case, water. Tubes under test must therefore first be flooded to use this technique. IRIS relies on a transducer to generate an ultrasonic pulse parallel to the axis of the tube under test.