African Fusion

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AFRICAN FUSION March 2016 36
INDEX TO
ADVERTISERS
Today’s technology
Afrox......................................................................IFC
Air Liquide............................................................. 18
Air Products........................................................... 33
Envirox................................................................... 35
ESAB. ..................................................................... 16
Hydra-Arc. ............................................................. 29
Lincoln Electric ......................................... OFC, OBC
Renttech SA......................................................... IBC
SAIW......................................................................... 2
voestalpine Böhler Welding................................. 30
Yaskawa Southern Africa...................................... 10
IIW International
Conference, 2016
The 69th IIW Annual Assembly and In-
ternational Conference will be held in
Melbourne, Australia from 10 to 16 July,
2016 under the theme: FromConcept to De-
commission: The Total Life Cycle of Welded
Components.
Welding affects the long-term life cycle
and performance of so many of the world’s
assets, across sectors as diverse as utilities
and manufacturing, to mining, oil and gas.
Welding is the bond that holds together
bridges that link nations, oil platforms that
power entire countries, andmanufacturing
plants that feed entire communities.
The conference aims to explore the
entire life cycle of weldments, from initial
concept, design and manufacturing, right
through to the installation, maintenance,
and repair of welded components, aswell as
life extension and decommissioning.
ITER (the way in Latin) is one of the
most ambitious energy projects in
the world today. In southern France, 35
nations are collaborating to build the
world’s largest tokamak fusion reactor,
ITER chooses narrow gap welding for its structural sub-assemblies
a magnetic device that has been de-
signed to prove the feasibility of fusion
as a large-scale and carbon-free source
of energy based on the same principle
that powers the Sun and stars.
ITER is being pursued to test the
integrated technologies, materials, and
physics regimes necessary for the com-
mercial productionof fusion-based elec-
tricity. It will be the first fusion reactor
to produce net energy and to maintain
fusion for long periods of time.
The project represents a unique
challenge for the assembly of work-
pieces, particularly on site, due to the
required precision after assembly and
zero-defect end quality.
Critical areas include the pre-con-
ditions required in terms of mechanical
preparation, positioning and fixtures, as
well as unavoidable deformation that
occurs during assembly by welding.
Narrow gap hot wire TIG welding is
emerging as an essential technique for
joining critical components such these,
with large wall thicknesses that need to
be completed and assembled on-site.
This welding process perfectly meets
the constraints involved in the final
assembly because of its all-positional
capability.
Polysoude can offer two main tech-
nological approaches:
• Using a torch with a fixed electrode
position.
• A system with an oscillating elec-
trode.
The first technique meets productiv-
ity requirements for the preparation of
joints with perfectly defined tolerances.
The second technique, however, satis-
fies the need for maximum flexibility in
compensating for workpiece prepara-
tion and fit up tolerances and for shrink-
age during welding.
Torch carriers, such as robots, col-
umn and boom and carriage-type
welding manipulators, are tools that
are adapted to the size and geometry of
the joint to bewelded. If awell-designed
Narrow gap hot wire TIG welding is emerging as an
essential technique for joining critical components
such as those required for the ITER, mooted to be the
world’s largest tokamak fusion reactor.
manipulator is incorporated, it is realis-
tic to consider using the narrow gap TIG
process toweld sections of up to400mm
thick, given the numerous relevant
advantages compared to competing
processes availableon themarket today.
This technology can alsobe adopted
in all areas of industry, such as the con-
struction of equipment for the energy
(hydro-electric, conventional fossil fuel
and nuclear power plants), petrochemi-
cal and to the manufacture or repair of
heavy walled pipes.
Promoting R&D
Polysoude has been creating solutions
best adapted to the requirements of
the industry since its foundation in the
early 1960s. To master arc welding pro-
cesses and their automation, Polysoude
strives to use the latest GTAW, Plasma,
GMAW and FCAW technologies, along
with all-position orbital welding and
mechanised solutions.
The company prides itself on its
ability to offer:
• Research and development.
• Testing and feasibility studies.
• Reliability and user-friendly graphi-
cal user interfaces.
• Small volume, custom made hard-
ware and software systems with
dedicated mechanical and elec-
tronic engineering.
• Welding and after sales services.
• Training, commissioning and sup-
port services.
The strictest checks areapplied through-
out the production and assembly pro-
cess to ensure that Polysoude solutions
are competitive and that customers’
needs are being met.
Polysoude has been ISO 9001-certi-
fied since April 2006. This certification
defines the approach taken towards
continuous quality improvement of
products and the services and also ap-
plies to the company’s Intranet, TDMS,
CAD, CAM, ERP and CRM systems.