Page 26 - ITAtube Journal 3 2025

Technical papers
Tecnar
Real-Time Wall Thickness Measure-
ment with Lut 2.0: A Game Changer
for Welded Pipe Production
Welded pipe mills, particularly electric
resistance welding (ERW) plants, have long
relied on the assumption that accurate wall
thickness naturally follows from consistent
input coil thickness and well-maintained
forming and reduction equipment. How-
ever, recent industrial use of Tecnar’s Lut
2.0 has demonstrated that this assumption
often conceals inefficiencies that can be
remedied only through real-time wall-thick-
ness measurement.
In a typical ERW process, a steel coil is
formed, welded, reheated, reduced, and
cut into fixed lengths before cooling. De-
spite careful mechanical control, geometric
deviations frequently arise. Variations in
weld heat, roll alignment, or material flow
can produce circumferential thickness
differences, or “eccentricities,” that reduce
dimensional consistency. Without online
measurement, these irregularities go
undetected until after production, forcing
operators to maintain large safety margins
to avoid out-of-tolerance pipe, an approach
that consumes more steel than necessary
and lowers yield.
The introduction of Tecnar’s Lut 2.0 into
welded pipe mills provides a practical rem-
edy. As the only non-contact ultrasonic sys-
tem specifically designed for hot steel pipe,
the Lut 2.0 continuously measures wall
thickness and eccentricity at full production
26 ITAtube Journal December 2025