Ultrasonics

GE Inspection Technologies

Krautkramer Testing Machines
Flash trimming monitoring
on ERWpipes
Monitoring the ash trimming
on longitudinal weld seams of
ERW-pipes
For a user of welding lines for the
production of ERW-pipes it is important
to see whether the trimming tool,
responsible for removal of the inside
ash, is working correctly. Using the
testing machine which we developed,
this monitoring is made directly after
welding and not after the tubes have
been cut. Therefore this testing machine
is primarily a system for monitoring and
control of the production process.

For ash trimming monitoring: OSK
The system operates with an oscillating
immersion probe which measures the
wall thickness in the area of the weld.
As an alternative a phased array system
can be used. The advantage of the ash
trimming monitoring with phased array
is that there is no mechanical movement. Probe switching is done electronically via a time delay.

Flash trimming monitoring
in the production line

The result is displayed on a monitor as a
topographical presentation of the inside
tube surface. Irregularities are immediately recognized thus enabling direct
process control.

Oscillation

Probe

Water delay

Wall

Test
mechanism
lowered