Ultrasonic Testing Flaw Detection

Ultrasonic Testing (UT) uses high frequency sound energy to examine components and it is capable to detect internal flaws, perform precision measurements and material categorization. Ultrasonic testing has been used in ensuring quality and integrity of new components, weld joints, including service items, and has become vital across the industrial sector.

NUSATEK provides Ultrasonic Flaw Detection (UTFD) using A-scan ultrasonic detectors and an extensive range of tools and techniques to match every inspection challenge. The most common anomalies include cracks, voids and porosity in metals.

Nusatek provides this service to almost any industry that uses metal as a product, from aerospace to petrochemical oil and gas pipelines, storage tanks and power generation. We are capable of examining various types of steel products such as welding joints, components, raw materials, boilers and many more.

The advantages of ultrasonic testing include:

  • Access is only required from one side for pulse-echo mode
  • The depth of penetration is superior to other methods
  • Highly accurate flaw sizing and shape
  • Minimal part preparation is required.
  • Results are in real-time



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    Ultrasonic Testing Flaw Detection

    The basic principle for Ultrasonic Testing Flaw Detection is to examine or detect flaws inside the weldment. The UT flaw detection usually is a form of shear wave or longitudinal wave, depending on the application and type of transducer used. A pulse/receiver is an electronic device that can produce high voltage electrical pulses to the transducer. When driven by the pulse, the transducer generates high frequency ultrasonic sound energy into the material in the form of sound waves. When there are discontinuities such as inclusions, porosity, cracks, etc. in the sound path, part of the mechanical energy will be reflected from the discontinuities' (reflectors') surface. The reflected sound waves signal received by the transducer is then transformed back into an electrical signal and its intensity is shown on the display unit. The sound waves travel time can be directly related to the distance that the signal has travelled. From the signal, information about reflector location, size, orientation and other features can be determined.

    Flaw detection usually uses the shear wave form and thickness measurement uses the longitudinal wave form.