TPT January 2012

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VOL 25 NO 1 JANUARY/F EBRUARY 2012
Bending machinery
Manipulation of a length of tubing
of various sizes entails vulnerability:
to breakage, wrinkling, scratching,
marking, humping, collapse, excessive
springback, and link failure, among
others. The methods by which these
threats are circumvented may vary,
but never the results. The sole standard
applicable to the finished workpiece is
always “bent the best way.”
The companies on these pages are
some of the best in the world at this
difficult task.
Finishing and end finishing
At some stage in the production
process the tubes are close to
completion – certifiable, deliverable,
billable. But it is not finished until it is
finished. Those charged with quality
control in a state-of-the-art tube mill
know this stage as the last checkpoint
in the production phase of the cycle,
hence the most important. Because
rejection further along is always costlier
than rejection earlier on, finishing and
end finishing tend to be the province of
perfectionists.
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CONTENTS
125
Larikka CylinWeld:
Tubular parts manufactured better
By Maarit Aalto, marketing director, Larikka Ltd, Finland
116
Improving standard methods of grain size determination in
high-alloy steel and alloy products
By D Yu Klyuev, Ye Ya Lezinskaya, VV Perchanik (National Metallurgical Academy of Ukraine)
& NA Koryaka (ITA Representative in CIS, Ukraine)