TPT May 2008

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T ube & P ipe Welding: T rends & Progress
101 May 2008 ›
Power grid tubes for tube
and pipe welding
Richardson Electronics Ltd, USA, a leading
supplier of power grid tubes for over 60
years, has a firm commitment to the tube
and pipe welding industry. Richardson
stocks an extensive inventory of power grid
tubes ready for immediate delivery, from
such leading manufacturers as Amperex,
Eimac, Econco, National, Thales, and
Toshiba.
The company is skilled in identifying
and supporting cost-effective solutions
for customers in the RF and wireless
communications, electron device, power
conversion, medical imaging, and display
systems markets.
Richardson supplies a full range of
components and services that include
product manufacturing, systems integration,
prototype design and manufacture, testing
and logistics.
Richardsons Electronics Ltd – USA
Fax: +1 630 208 2550
Website:
both on the single module and on the
whole system to limit component failures.
The modular structure and a complete
diagnosis system allow for quick and
easy maintenance in order to reduce
production stops.
A special digital control system has been
developed for an optimum phase locking
(and then for an efficiency increasing). It
also has the possibility to follow the change
of frequency (with any working condition)
due to load variation.
The Saet Group provides full technical
support, with a quick and cheap solution
available in the form of remote teleservice.
This allows the company’s technicians to
operate directly on the welding unit without
paying a visit.
Emmedi Welding & Annealing Division
(Saet Group) – Italy
Fax: +39 011 9974328
Email:
Website:
Emmedi, part of Italy’s Saet Group, has
launched a new solid state welder, with
250kW output power, based on a Mosfet
inverter able to work up to 450kHz.
The new welder is comprised of units
including transformer, power supply,
welding head, cooling system and control
desk.
The power supply is a three-phase full
bridge thyristor rectifier. Proper filters are
inserted in order to reduce the harmonic
components that may effect the welding
process. A system control board is included
that communicates with the inverter through
optical fibres.
The inverter is a current fed type,
composed of a suitable number of modules
(each power rated to 25kW). The modules
are connected in parallel, with an output
oscillating circuit directly connected to the
inverter.
The necessary protections (hardware
and software) have been implemented
Orrcon Steel is an Australian market leader in the manufacture and distribution of steel tube and pipe with precision manufacturing
operations near Adelaide, South Australia, precision and structural tube manufacturing operations in Brisbane, Queensland and a
forming plant and API accredited large pipe and tube mill in Wollongong New South Wales.
We have an Australia-wide sales and distribution network servicing our customers in the rapidly growing mining, infrastructure,
water, oil and gas and manufacturing sectors, along with established fabrication and general market sectors.
We are looking for talented people with solid engineering, production, tooling or technical experience in quality pipe and tube
manufacturing and related support services. If you are thinking of moving to Australia your future may be with Orrcon.
We have openings in various locations and functions across our operations and are interested in supporting prospective candidates
with sponsorship to migrate to Australia.
If you are interested please submit your resume detailing your skills
and experience in the steel tube and pipe industry to:
Susan Skee
Human Resources
THINKING OF LIVING AND
WORKING IN AUSTRALIA?
For our company profile visit
Latest 250kW solid state welder
with Mosfet inverter