TPT September 2011

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102 S eptember 2011 ›
Technology Update
Home of the U-Trak Length Control System
“Incorporated in the Haventrak Flying Shear
for Dimple Free Cuts on the Fly! ”
UNIVERSAL TUBE & ROLLFORM
EQUIPMENT CORPORATION
/
26202 Glenwood Road
Perrysburg, OH 43551, USA
Tel: +1 419.872.2364
Fax: +1 419.874.2825
See us at Fabtech
Booth no. 548
Specializing in Used & Reconditioned
Tube Mills and Rollformers for over 25 years!
/
We offer a one stop resource for your
Tube Mill & Rollforming Applications:
Custom Tube Mill & Rollform Reconditioning
NEW Mill Controls and Drive Systems
NEW U-Trak Length Control Systems
Complete Turn Key Solutions
Engineering Services
Experience you can count on!
A NUMBER of competing orbital welding
processes have become established on
the market for providing economical pipe
connection in the construction of pipelines
and for DN300 or larger lines laid in the
ground for a pipeline. For example, a seam
root can be joined using the tungsten inert
gas (TIG) process, and then the fill and
final passes processed with metal active
gas (MAG) welding. These two processes
require two sources of power. Another
example is the purely MAG welding process
used in America, which requires a lot of
additional processing. Both solutions make
field work and work done in the workshop
more difficult and expensive.
EWM Hightec Welding manufactures a
complete automated orbital welding system
that handles every joining task at the pipe
in an exemplary way: the pipeTruck orbital
pipe welding system with track system;
the dynamic multi-process inverter power
source alpha Q, with patented welding
processes pipeSolution, coldArc, forceArc,
superPuls process switching and the pulse
arc; automatic welding torches (AMT); and
welding consumables.
The pipeSolution automatedMAGprocess
for root welding offers welding speeds up to
five times faster in comparison to manual TIG
welding, and the seam is up to 100% X-ray
proof. EWM says that this provides MAG
welding in TIG quality. No second power
source is required for subsequent welding of
the fill and final passes.
The alpha Q is equipped with a double
wire feeder for optional supply with additional
welding wire (solid or flux cored wire). To
change the seam type, all that is required is
to exchange the torch. The system is then
ready to continue working at the push of a
button. A deposition rate of up to five times
higher in comparison to MMA welding can be
achieved with flux cored wire.
With the commonly used purely MAG
process, root welding with the short arc
is followed by grinding out in preparation
for filling, ie removal of excess weld metal
and uneven sidewalls. With pipeSolution
from EWM, all that is required is brushing
to remove silicates from the seam surface.
Further passes are created step by step
without expensive intermediate work. Fill
and final passes are welded as per the
customer’s wishes or according to the
WPS, either with the pulse arc or flux
cored wire.
The orbital welding system from
EWM welds at high speed and with high
precision in the vertical-down and vertical-
up positions. The control of the alpha
Q also offers the option of dividing up
the process into programmable sections.
Convenience is increased by jobs already
integrated in the system. The pipe welding
carriage (tractor), weighing only 19kg, can
be placed effortlessly on the stainless-
steel track system, which is available for
most pipe dimensions from 300mm and
up. The standard remote control allows the
operator to fully monitor the orbital joining
process and to make any necessary
corrections.
EWM Hightec Welding GmbH – Germany
Fax: +49 2680 181 244
Email:
Website:
MAG orbital welding in TIG quality