VENUS NDT SERVICES

Corporate

Ultrasonic Thickness Gauging is a method of performing non-destructive investigation to check material properties such as thickness using ultrasonic waves. Venus NDT Services makes use of this NDT technique in a professional way in situations where an inspector has access to only one side of a part whose thickness must be determined, such as the case of a pipe or tube, or where simple mechanical measurement is impossible or impractical for other reasons such as part size or access limitations. The ability to gauge the thickness of a solid element without requiring access to both sides of the test piece, offers this technology a multitude of possible applications. Making the most of this advantage, Venus NDT Services (VNS) utilizes Ultrasonic Thickness Gauging technique in all areas of industrial measurements.

The Magnetic Particle Inspection method of Non-Destructive testing is a method for locating surface and sub-surface discontinuities in ferromagnetic material. It depends for its operation on the face that when the material or part under test is magnetized, discontinuities that lie in a direction generally transverse to the direction of the magnetic field, will cause a leakage field, and therefore, the presence of the discontinuity, is detected by use of finely divided ferromagnetic particles applied over the surface, some of these particles being gathered and held by the leakage field, this magnetically held collection of particles forms an outline of the discontinuity and indicates its location, size, shape and extent.

In ultrasonic testing, very short ultrasonic pulse-waves with center frequencies ranging from 0. 1-15 MHz and occasionally up to 50 MHz are launched into materials to detect internal flaws or to characterize materials. The technique is also commonly used to determine the thickness of the test object, for example, to monitor pipework corrosion. Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood and composites, albeit with less resolution. It is a form of non-destructive testing used in many industries including aerospace, automotive and other transportation sectors.

In Liquid Pentrant the test object or material is coated with a visible or fluorescent dye solution. The excess dye is removed from the surface and a developer which acts like a blotter is applied drawing penetrant out of imperfections open to the surface. With visible dyes, the vivid color contrast between the penetrant and the developer is used. With fluorescent dyes an ultraviolet lamp is used to make the ‘bleed out’ fluorescence brightly allowing the imperfection to be seen readily.

Radiography uses and x-ray device or radioactive isotope as a source of radiation which passes through the material and is captured on film or digital device. After processing the film an image of varying density is obtained. Possible imperfections are identified through density changes.