Conventional Eddy Current technique (ECT) is based on measuring the impedance of a coil. Conventional eddy current testing is used for testing non-ferromagnetic tubing, such as stainless steel, copper nickel alloys, titanium and etc. Most commonly used for tubular inspections and verifying heat exchanger integrity, and for bundle life trending reporting to help prevent unscheduled outages due to unexpected bundle failure.
The IRIS uses a unique technique of displaying the pulse echo wall thickness image. Each rotation of the mirror produces stationery, rectilinear image of the corresponding circumferential cross section of the tube wall. This image clearly differentiates between Internal and External defects and may be viewed (real time) on either the oscilloscope or the computer screen.
The RFT technique is mainly used for ferromagnetic tubes such as carbon steel, nickel and ferritic stainless steel. The RFT technique can be used to inspect heat exchanger, feedwater heater, boiler and buried pipe.
This technique is based on the influence of defects on a magnetic field. The MFL probe consists of a magnet with two types of magnetic pickups: coil types and Hall element. The coil detects small defects that cause perturbations in the flux. The hall element sensor is detecting gradual wall loss.
Videoscopes use the very latest in optical and digital technology, and are rapidly becoming the instruments of choice for most applications. The image is obtained via precision Olympus lenses and a high-resolution colour CCD camera in the objective end of the instrument, ensuring the highest quality, brightest images available.
Time of Flight Diffraction (TOFD) is one of the most reliable non-destructive testing methods in testing welds for both pre-service and in-service inspection. An accurate assessment of welds is vital to ensure that the stability and integrity of welded structures is not compromised by defects.
Phased Array Ultrasonic Testing (PAUT) is an advanced non-destructive technique that used to inspect more complex geometries that are difficult and much slower to inspect with single probes. PAUT can be used to inspect almost any material for weld inspections and crack detection.
The most effective method of testing tank floors is using Magnetic Flux Leakage systems. By magnetizing the floor plates between two poles of a magnet, and then using a series of detectors mounted between the poles, surface leakage fields above the plate can be measured. These systems can be effective over several millimetres of coating thickness, and can scan the plates very quickly.
LRM XXI system configuration incorporates with multi-channel signal processing which enable users to obtain exact status of the object under NDT by magnetic inspection. The LRM XXI system provides both qualitative & quantitative analysis of the signal traces based on its calibrated measurement arrangements.
C-Scan refers to the image produced when the data collected from an ultrasonic inspection is plotted on a plan view of the component. The C-scan is used in corrosion mapping and by techniques other than just ultrasonic.
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