HAASEE offers the NDT training and certification for Level I & II as per ASNT recommended practice SNT-TC-1A and client customized specification in the following methods.
HAASEE also offers NDE AWARENESS PROGRAM for the Employees to meet the Zero defect Quality concept which leads to Cost effective in production.
- Liquid Penetrant Examination (PT)
- Magnetic Particle Examination (MT)
- Ultrasonic Examination (UT)
- Radiographic Examination (RT)
- Visual Testing (VT)
- Eddy current Examination (ET)
- Radiographic Testing Film Interpretation (RTFI)
- Ultrasonic Thickness Gauging (UTG)
Ultrasonic Testing method use beam of sound waves (vibrations) of short wavelength and high frequency, transmitted from a transducer and detected by the same or other transducers. Usually, simple transducers will produce the sound waves inside the material with or without contact in the specimen to be tested. The CRT screen shows the time base in the abscissa and the amplitude of the size of the flaw in the ordinate.
Complex mutiprobe systems are also used with mechanical probe movement and digitization of signals, followed by computer interpretation are developing rapidly. The echo will be arise in the CRT if any discontinuities is present inside the material which is perpendicular to the sound propagation because of the reflection from the discontinuities due to the Acoustic Impedance Difference.
LIQUID PENETRANT TESTING
The Liquid Penetrant testing is a method for locating the surface discontinuities which is open to surface.
Simply the colour contrast Penetrant or Fluorescent Penetrant is applied over the examining surface. Time is allowed for the Penetration of the Penetrant into the discontinuities due to the Capillary Action. Succeeding the excess Penetrant removal from the surface, then the surface has to dry for applying the Dry developer. Proper developing time gives the output of the indication from the discontinuities by the Blotting process.
Liquid penetrant testing can be applied to any non-porous clean material, metallic or non-metallic, but is unsuitable for dirty or very rough surfaces. Penetrant can contain a dye to make the indication visible under white light, or a fluorescent material that fluoresces under suitable ultra-violet light. Fluorescent Penetrant is usually used when the maximum flaw sensitivity is required.
MAGNETIC PARTICLE TESTING
The Magnetic Particle testing is a method for locating surface and sub-surface discontinuities in ferromagnetic material. Initially the test object has to be magnetized by the magnetization force.
The magnetic flux leakage will occurs if there is any deviation from the magnetic flux lines inside the testing object because of the PERMEABILITY DIFFERENCE.
The discontinuity is detected by use of Dry or Wet ferromagnetic particles applied over the surface, because of the leakage field the ferromagnetic particles will concentrate. Also the defect can be identified only when the defect orientation is 45 to 90 degrees to the magnetic flux.
The visible method and also the fluorescent method are used for the sensitivity application.
Radiographic Testing (RT) is the method of inspecting materials for hid-den flaws by using the ability of short wavelength electromagnetic radiation (high energy photons) to penetrate various materials.
The radiographic film detects the radiation and measures the various quantities of radiation received over the entire surface of the film. Discontinuities in the material affect the amount of radiation being received by the film through that particular plane of the material due of the principle of RADIATION ABSORPTION DIFFERENCE.
Radiography can be used on most materials and product forms, e.g. welds, castings, composites etc.
Eddy current testing (ET) is the method of inspecting materials that uses the principle of ELECTROMAGNETIC INDUCTION to detect flaws in conductive materials.
Eddy current is well suited to detect small cracks and well as other forms of discontinuities at or near surfaces of the materials, the surface preparation is minimal, and complex specimen geometry can be inspected.
Visual testing (VT) is the method of inspecting or monitoring of specific parameters by visual and optical assessments of test objects and surfaces using the visible portion of the Electromagnetic Spectrum.
OUR CERTIFICATE FORMAT