We produce various NDT instruments – from handheld flaw detectors to complex automated inspection systems, which are available worldwide through our network of distributors. In addition to sales, we provide post-sale and warranty services for all our products.
Our equipment utilizes a variety of state-of-the-art methods and techniques for non- destructive testing, including ultrasound, phased array, time-of-flight diffraction (ToFD), electromagnetic acoustic (EMA), eddy current, eddy current array, as well as a wide range of other conventional and custom approaches. We specialize in identifying the appropriate technique or combination of techniques to meet your specific needs.
Our flaw detectors are commonly used in the following industrial sectors:
railroad
power & aerospace,
machine building & manufacturing.
NDT ultrasonic inspection techniques allow the identification of defects located at a considerable depth in various materials, products, and weld joints. Compared to other non - destructive testing methods, ultrasonic flaw detection has significant advantages: a high sensitivity to the most hazardous defects like cracks or incomplete penetration; high capacity; and the ability to supervise the testing directly from an operator’s workplace with no process interruption – all at low operational cost. Ultrasonic examination is applied in a wide range of industries: power, heavy machinery, railroad, ship building, and the chemical sector. Hundreds of thousands of meters of structural welds, tens of thousands of pipe joints, boiler units, rail weld joints, as well as the quality of pressurized tank parts, forgings, tubes, rolled plates and other products are annually inspected by means of ultrasonic NDT techniques.
Basic UT techniques are as follows:
Pulse Echo technique is the most common approach: a single probe acts as both transmitter and receiver, generating UT waves, which are reflected back from defects. This method is in wide use due to its simplicity: requiring only one probe means that there is no need for special fixtures or alignment of acoustic axes as required by a two-probe approach. In addition, it is one of the few ultrasonic NDE procedures that ensures accurate measurement of defect coordinates, pinpointing depth and location in the test object.
Echo Image technique (also known as “Tandem” or “Duet”) utilizes two probes placed on the same side of a test item. Waves generated by the transmitter probe are reflected from flaws towards the receiver. It is generally used for recognizing defects oriented perpendicular to the test surface, such as cracks.
Time-of-Flight Diffraction technique (ToFD) utilizes two probes placed on opposite sides of a test item. If a defect has sharp edges (for instance, cracks), UT waves are diffracted from the defect ends and reflected in all directions, including towards the receiver. The ultrasonic machine compares the original and the reflected pulses, and the instrument screen displays an accurate estimate of both the location and the upper and lower boundaries of the defect. ToFD inspection is quite a multipurpose technique that allows to perform ultrasonic testing of welds of any complexity; however, it requires specialized fixing devices for the probes and a tester capable of operating in ToFD mode.
Echo Shadow technique is used for the examination of products with two parallel faces, transmitting signals from one side and analyzing their echoes reflected from the opposite side. The concept is similar to that utilized by the Through-Transmission technique; however, unlike Through-Transmission, Echo Shadow only requires access to one side of the test object.