Dye Penetrant Examination (D.P.E)

The test object is coated with a solution that contains a visible or fluorescent dye. Excess solution is then removed from the surface of the object but leaving it in surface breaking defects. A developer is then applied to draw the penetrant out of the defects. With fluorescent dyes, ultraviolet light is used to make the bleed out fluoresce brightly, thus allowing imperfections to be readily seen . With visible dyes, vivid color contrasts between the penetrant and developer make "bleed out" easy to see. The red indications below represent a number of defects in this component.

Ultrasonic Examination and Shear Wave Ultrasonic

In ultrasonic testing, high-frequency sound waves are transmitted into a material to detect imperfections or to locate changes in material properties. The most commonly used ultrasonic testing technique is pulse echo, whereby sound is introduced into a test object and reflections (echoes) from internal imperfections or the part's geometrical surfaces are returned to a receiver. Below is an example of shear wave weld inspection. Notice the indication extending to the upper limits of the screen. This indication is produced by sound reflected from a defect within the weld. We are having team of well qualified ultrasonic Level-II operators, under guidance of ASNT-III Personnel that perform the testing.

Magnetic Particle Examination

This NDE method is accomplished by inducing a magnetic field in a ferromagnetic material and then dusting the surface with iron particles (either dry or suspended in liquid). Surface and near-surface flaws produce magnetic poles or distort the magnetic field in such a way that the iron particles are attracted and concentrated. This produces a visible indication of defect on the surface of the material. The images below demonstrate a component before and after inspection using dry magnetic particles. We are conducting dry/ wet, visible/ fluorescent magnetic particle examination by yoke/prod method for materials and weld joints during fabrications and in service for wide range of industries like steel plant, cement mills, nuclear power plant, petrochemical and fabrication shops