Nest
(National Employment Service and Training) is a leading training institute for
ASNT level II. We are the only training centre giving 100% placement assistance
to the candidates till candidates get placed. Our trainers are having more than
ten years of field experience in industries like petroleum refineries and power
plant (nuclear, thermal). Our
candidates will get a globally authentication certificates from ASNT America
Society for Non Destructive Testing level II as per SNT-TC-1A standard on
successful completion of training and practical exams.
Our candidates will get onsite
training in the particular industries like refineries and power plant to get a
real time experience. Nest takes whole responsibilities of our candidates
developing in their career. Other than NDT training, we are providing
Motivation class, personality development session to get through in their
interviews with fear.
Nest Institute of NDT posse’s high
quality international standard training for NDT in accordance with quality
management system and pursuing placement for candidates to improve their
career.
To give quality training and
education along with placement for the youngsters to enrich their career (or)
to make their life delightful.
Courses
VISUAL TESTING, LIQUID PENETRANT TESTING,
MAGNETIC PARTICLE TESTING, RADIOGRAPHY TESTING, ULTRASONIC TESTING.
VISUAL TESTING, LIQUID PENETRANT TESTING
The earliest and most useful method of NDT is
visual examination. Important details can be collected during VT which would be
useful for future analysis and also to decide on the types of NDT to be used
for as further analysis. Also, VT should be carried out as a complementary
method to all other NDT methods.
VT is
selected for detecting the following discontinuities:
- Surface deposits
- Scaling
- Corrosion
- Discoloration
- Oxidation bulging
- Missing parts
- Mechanical damage
- Dimensional conformance
- Gross effects visible on the surface
- Distortion of components during fabrication
and in services
- General corrosion on the surface of a
component
LIQUID PENETRANT TESTING
Liquid penetrant testing (LPT)
is another means of enhancing the capability of visual examination. It is
suitable for use on smooth surfaces of all materials, magnetic as well as
non-magnetic. It is limited to surface defects. Its inability to indicate the
depth or breadth of flaw should be kept in mind while selecting this method for
particular application.
Use of LPT for porous materials is
ruled out since the absorption into the pores would mask the presence of
defects. A clean surface is a pre-resist as penetrant cannot enter in to the cracks
that are filled with dirt, oil, or other matter.
Size, shape, weight and number of work
pieces to be inspected often influence the selection of a penetrant system. The
desired degree of sensitivity and the cost are the most important factors in
selecting a system.
LPT is selected for detecting the
following types of discontinuities on the surface of a component.
1. Cracks
of any orientation
2. Porosity
3. Pin
holes
4. Voids
5. Forging
laps
6. Forging
bursts
7. Lamination
in plates
8. Various
types of weld defects
9. Corrosion
cracks
10. Creep
fissures
11. Fatigue
cracks
MAGNETIC PARTICLE TESTING
While LPT is effective only for fine
surface discontinuities, the need remains to detect larger surface flaws or
those present just below the surface. The need is met by magnetic particle
testing (MPT). This technique is applicable only for ferromagnetic materials.
MPT is a considered more sensitive than LPT. Their detection in ferrite materials is most easily accomplished by
MPT. Since the depth determination of the surface breaking cracks is almost
impossible, crack depth measurements may be additionally employed to asses
them. Detection of subsurface defects by MPT is impossible if the components are
thin, but generally it requires ideal testing conditions.
MPT is
used for detecting following discontinuities in ferromagnetic materials.
Surface
discontinuities:
- Cracks and tears
- Porosity
- Shrinking cavities
- Slag inclusions
- Voids
- Forging laps
- Grinding cracks
- Corrosion cracks
- Fatigue cracks
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