A free CD-Rom called explains the process of automatic TIG welding of tubes and, most importantly, the benefits provided by this surprisingly versatile process.
A free CD-Rom called explains the process
of automatic TIG welding of tubes and, most importantly, the benefits provided
by this surprisingly versatile process.
ESAB is offering a free CD-Rom called ‘Automatic TIG
welding gives better results’.
As the name suggests, this explains the process of automatic
TIG welding of tubes and, most importantly, the benefits provided by this
surprisingly versatile process.
Compared with manual welding of tube, automatic TIG welding
offers a number of advantages relating not only to the consistency of the
weld around the tube, but also weld quality
from one joint to the next.
In addition, considerable cost savings are available due
to a reduced need for skilled labour, less finishing, and less rework.
It should also be remembered that automatic welding of
tube needs only minimal space, whereas manual welding requires good access
on all sides in order to achieve a high quality weld around the full circumference.
This has benefits in the fabrication shop as well as on
site during assembly or repair work.
Automatic TIG tube welding is an obvious choice for high-integrity
welds for use in the food, beverage, pharmaceutical, nuclear, chemical and
petrochemical industries, especially where two tubes of the same diameter
are being joined end-to-end.
But the versatility of the process stretches much further.
Wall thicknesses of up to 80mm can be welded in low alloy
steel, stainless steel, duplex or super duplex grades by using ‘narrow gap’
Moreover, this process can greatly reduce the time required
Tubes of different diameters can be joined with fillet
welds if required, and it is even possible to join tubes of dissimilar materials
– such as low-alloy steel and stainless steel.
Copper nickel tubes, which are difficult to weld manually,
can also be successfully welded using automatic The equipment can also be
adapted for the welding of boiler tubes.
As well as straightforward tube joints, automatic TIG
welding can be used to join tubes to end plates or flanges, or to join tubes
to elbows, T-pieces or other components.
Depending on the equipment used, as little as 15mm axial
clearance is needed from the centreline of the weld to any obstruction.
The approach adopted by ESAB is to offer ergonomically
designed portable and mobile modular systems for automated TIG tube welding
rather than bolt-on accessories for standard welding equipment.
This enables the process to be optimised to suit the particular
needs of tube welding by means of microprocessor controls and inverter-based
power sources, in addition to tooling.
For example, when welding tubes, it is possible to divide
the weld run into sectors with different parameters in each; this avoids
the problem defects on the upper and lower sides of the tube.
ESAB offers an extensive range of flexible component systems
for tube welding and joining.
Included within this scope of supply are tools and components
to suit niche applications such as enclosed tube welding
heads for use with highly polished stainless steel, shielded heads for
welding titanium tubes, and heads for internal bore welding.
Accessories extend from joint preparation tools, supports
and water cooling units, to wire feeders, printers for documenting the programmed
weld parameters and measured values, and software for weld quality assurance
and quality control.
Details of the available equipment and the process itself,
together with useful information and guidance on automatic tube welding,
are all contained on the CD-Rom.
This is an invaluable resource for those contemplating
or already utilising automatic TIG welding of tubes.
Source : www.manufacturingtalk.com