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Bharat Heavy Electricals Ltd
inaugurated a new nondestructive
testing system in
the cold mill area of Seamless
Steel Tube Plant at Tiruchirappalli
in Tamil Nadu, an official
release said.
SSTP is a major producer of
seamless steel tubes and pipes,
which are critical and major
components of steam generators
for thermal power plants.
The new system, consisting of
an automatic on-line ultrasonic
testing machine with state-ofthe-
art advanced computerised
technology, will be used for testing
all the tubes manufactured by
SSTP for freedom from internal
defects in the entire volume of the
tubes. The machine also has the
capability to measure dimensional
accuracy of the tubes.
The machine, supplied by
Magnetic Analysis Corporation
of USA, consists of a rotary
ultrasonic test head
with 16 ultrasonic transducer
probes, rotating
at 1200 rpm. The tubes
can be tested at a speed
of 60 metres per minute.
Additionally, it has laser
length measurement
head, defect marking
system, tube identification
marking system
and eddy current testing
head.
The machine can test
tubes of outer diameter
from 20mm to 160mm having
wall thickness from 2mm to
12mm and length from 3m to
24m. The ultrasonic test head
can scan for longitudinal and
transverse and lamination
defects both on the external surface
and within the volume of
the tube of even 0.3mm depth,
the release added.
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