TPT May 2008

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Tube & Pipe Welding: Trends & Progress
M ay 2008 110 ›
Sandvik, Sweden, has introduced a
unique, new welding strip called Sandvik
24.29.5.LCu for overlay welding. This
welding strip is claimed to significantly
improve welding productivity, reducing the
welding time by half.
The new overlay material is suitable for
oil and gas applications, such as pipe and
tube, heat exchangers as well as chemical
plant and vessel repair. It is both quick and
easy to use and provides an ideal overlay.
Traditionally, 904L overlay welding is carried
out with a double pass weld. Use of the new
Sandvik material allows the required grade
to be reached with one weld, cutting down
on previous operational time by around
100 per cent, while achieving the required
material grade.
“Not only do customers save on the
operational time taken to complete the
weld, but they also save on material
usage,” explained Mr Linus Svensson of
Sandvik. “In addition, a standard flux can
be used for the weld, rather than a more
expensive, special flux.”
The new welding strip is available in coils,
30, 60 or 90mm wide by 0.5mm thick.
Designed for use with corrosion resistant
high-alloy austenitic stainless steels and
nickel alloys, the welding strip gives a
weld overlay that has good resistance to
corrosion from phosphoric and sulphuric
acid and seawater.
Sandvik is one of the largest producers of
stainless steel welding strip in the world.
The company’s ongoing research and
development programme ensures the
introduction of new, time saving materials,
consumables and techniques for welding.
Sandvik Materials Technology – Sweden
Fax: +46 26 25 17 10
Website:
Range of equipment for
induction heating and
HF welding
Elestar produces, markets and installs
industrial plants for metal induction heating.
The company offers high frequency
longitudinal welding plants for tube obtained
from cold and hot rolled steel strips.
A highlight of the Elestar range are the
medium frequency bright annealing plants
that allow the heating of TIG welded tubes
(BA) at a temperature of 1,100°C, followed
by a cooling process that brings the final
temperature down to 50-100°C. The
whole in-line process is run in a protective
atmosphere (hydrogen).
Elestar is also able to supply all the
accessories used as complementary
application for induction heating plants.
Elestar products enable the welding
or heating of a wide range of tubes in
aluminium, ferritic and austenitic stainless
steel, copper and brass.
Elestar Srl – Italy
Fax: +39 011 997 4066
Email:
Website:
New overlay welding strip claims to
reduce welding time by half
 Sandvik’s unique, new overlay welding strip