TPT September 2017

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T E CHNOLOG Y
32 SEPTEMBER 2017
Straightening line for US tube customer
MAIR Research has its headquarters
and production site at Schio, near
Vicenza, Italy, and specialises in the
design and manufacture of tube and bar
finishing equipment and integrated lines.
Over the last 40 years the company has
been commissioned to produce a large
number of lines for companies in the
steel and tube industry.
Within its sites the entire production
cycle takes place for all of its
equipment, including design, fabrication,
assembly and testing in the presence
of customers prior to dispatch. Mair
Research has designed and installed a
straightening line suitable to process
tubes of up to 330mm diameter with
30mm wall thickness and 1,250N/mm2
yield strength for a customer in the USA.
These tubes are employed by the end
user for purposes where high quality and
resistance are vital.
The straightening process is carried
out with a machine equipped with
five pairs of rollers, with each pair
composed of two opposite rollers that
are adjustable in height and angle.
These rollers, placed in rotation and
following a specific path, will force
the tube to undergo a combination
of bending and crushing during the
rotation and transit. To deform a tube
of similar characteristics it is necessary
to employ rollers of 1.5 tons with drive
power up to 750kW.
The machine is composed of two
welded and machined main structures,
one upper and one lower, connected
by columns in order to obtain one rigid
structure that can easily be disassembled
for transportation.
Mair Research SpA – Italy
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Website:
T E CHNOLOG Y
Echomac 6/6A ultrasonic equipment for weld inspection, flaw detection and thickness and dimensional measurement
Full penetration welding technology
K-TIG is a welding technology company
based in South Australia. The company
claims that its new high speed, full
penetration GTAW welding technology
has productivity, cost and quality
advantages over existing processes,
particularly in stainless steels and other
corrosion-resistant materials.
K-TIG welds are performed in a
single, full penetration pass up to 13mm
(½") in stainless, duplex, super duplex,
Hastelloy, Inconel, Nimonic and other
corrosion-resistant materials and super
alloys, and up to 16mm (5/8") in titanium,
zirconium and other reactive metals.
The process requires no edge
bevelling and no wire (although wire
can easily be added). It uses as little
as ten per cent of the gas normally
required, and produces repeatable,
X-ray quality welds.
The K-TIG process involves a
specially controlled high current arc
that opens a full penetration keyhole in
the joint between the two surfaces to
be welded. It provides high stability and
operates over a wide range of welding
currents and travel speeds.
It was developed by the Australian
Government’s Commonwealth Scien-
tific & Industrial Research Organisation
(CSIRO).
K-TIG – Australia
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