CEMP-E
TI 809-26
1 March 2000
Table 8-2. Guidelines for Selecting Inspection Techniques
Table
VT
VT
PT
MT
UT
RT
E
Pocket
Fluorescent or
Wet or dry iron
Ultrasonic
X-ray or
q
magnifier,
visible
particles, or
units and
gamma-ray;
u
flashlight, weld
penetration
fluorescent;
probes;
film
i
gauges, scale,
liquids and
special power
reference
processing
p
t
etc.
developers;
source;
patterns
and viewing
m
ultraviolet light
ultraviolet light
equipment
e
for fluorescent
for fluorescent
n
dyes
particles
t
D
Weld
Discontinuities
Surface and
Can locate
Most internal
e
preparation, fit-
open to the
near surface
all internal
discontinuiti
t
up, cleanliness,
surface only
discontinuities:
discontinuiti
es; limited
e
roughness,
cracks;
es located by
by direction
c
t
spatter,
porosity; slag
other
of
i
undercut,
methods, as
discontinuity
o
overlap, weld
well as small
n
contour and size
discontinuiti
es
A
Easy to use; fast;
Detects small
Detects
Extremely
Provides
d
inexpensive;
surface
discontinuities
sensitive;
permanent
v
usable at all
imperfections;
not visible to
complex
record of
a
stages of
easy
the naked eye;
weldments
surface and
n
t
production
application;
useful for
restrict
internal
a
inexpensive;
checking edges
usage
discontinuiti
g
low cost
before welding;
es
e
no size
s
limitations
For surface
Time-
Surface
Highly skilled
Usually not
conditions only;
consuming; not
roughness may
interpreter
suitable for
L
dependent on
permanent
distort
required; not
fillet weld or
i
subjective
magnetic field;
permanent
T-joint
m
i
opinion of
not permanent
inspection;
t
inspector
film
a
exposure
t
and
i
o
processing
n
critical; slow
s
and
expensive
8-11
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