TYPES OF NON-DESTRUCTIVE TESTINGS-NDT TYPES (OVERVIEW)
NDT
is the process of find the discontinuity inside the materials so that we can
control or reduce the manufacturing or process cost. NDT plays major role to
find characteristic in the material. There are large number of NDT processes
used in this day which is depend on type of material and the process to be
performed.
The list of some types of NDT testing in short shown below,
- Liquid Penetration Testing. (LPT)
- Magnetic Particle Testing. (MT)
- Radiography Testing. (RT)
- Ultrasonic Testing. (UT)
- Visual Testing (VT)
- Leak Testing (LT)
- Laser Testing Methods (LM)
- Electromagnetic Testing (ET)
Various
types of NDT tastings perform on given job as per requirements. NDT is cover
large range of industrial activity and day by day NDT methods developed.
ASME SECTION V gives the procedures for some NDT testing
like (PT, UT, MPT, RT etc). The NDT techniques required to calibrate during
specific time so that work property in that given time. NDT process in involve
all kind of equipment required to calibrate and also the calibration
certificate before performed on the job. Also in this field Level 2, level 3
certification for technician mandatory as per requirements.
Image below shows the DP test (Die Penetrant
Test) performed on forging for detecting any kind of cracks or other open to
the surface discontinuities,
DP test (Die Penetrant Test) performed on Tori cone
of pressure vessel on knuckle area for finding cracks or any kind of surface discontinuities,
DP test (Die Penetrant Test) performed on joint setup before
weld for finding cracks or any kind of discontinuities,
UT test (Ultrasonic Test) performed on main shell of
pressure vessel for finding cracks or any other kind of discontinuities shown
with UT machine.
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