Ultrasonic Testing


Ultrasonic Testing is a Non-Destructive Testing method in which beams of high frequency sound waves that are introduced into the material being tested are used to detect surface and sub-surface flaws. The sound waves travel through the materials with some attenuation of energy and are reflected at interfaces. The reflected beam is detected and analyzed to define the presence and location of flaws.

Ultrasonic waves are almost completely reflected at metal gas interfaces. Partial reflection occurs at metal liquid or metal solid interfaces, with the specific percentage of reflected energy depending mainly on the ratios of certain properties of the matter on opposite sides of the interface.

Cracks, laminations, shrinkage, cavities, bursts, flakes, pores, bonding faults and other discontinuities that can act as metal-gas interfaces can be easily detected. Inclusions and other inhomogenities in the metal being inspected can also detected by causing partial reflection or scattering of the ultrasonic waves, or by producing some other detectable effect on the ultrasonic waves.


Ultrasonic testing or inspection (UT) is used for quality control and materials testing in all major industries. This includes Ultrasonic testing of castings, forgings, plates, weld joints, production of steel, aluminum and titanium, fabrication of structures, pressure vessels, ships and bridges. In service ultrasonic testing for preventive maintenance is used for detecting impending failure of vessels, exchangers, pipelines in refinery and petroleum industries also other machineries and components. The flaws to be detected include voids, cracks, inclusions, pipe, laminations, bursts and flakes. They may be inherent in the raw materials, may result from fabrication and heat treatment, or may occur in service from fatigue, corrosion or other causes. Ultrasonic testing can also be used to measure thickness of metal sections during manufacturing and maintenance inspections.

“Intrex offers full range of ultrasonic inspection whether your inspection requirements are for raw materials, weld or critical components..”

Intrex’s highly qualified/experience technicians use the most advanced equipment and software for reporting and identification of defects and measurements of various applications for conformity.