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TIG hot wire increases the deposit rate by more than 3:1
Compared to TIG cold wire orbital, TIG hot wire orbital welding is particularly advantageous for medium and heavy wall thicknesses.
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Combined advantages of TIG hot wire and narrow gap techniques
The combined effect of increased deposit rate and reduced bevel angle, allows a significant rise in productivity compared with an open bevel angle in TIG cold wire application.
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The right welding procedures
- The “large bevel” welding technique is quite flexible
- Standard preparations used for TIG cold wire welding are generally large bevel preparations such as V or J grooves.
- Welding with oscillation and single layer passes is used where the wall thickness is less than 20 mm.
- Welding with a large bevel is advantageous as it can support many different configurations and applications. Mixed bevel types (i.e. elbow joints) can also be used with this type of preparation.
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Welding with ”narrow gap” preparation (NG) gives an important increase in productivity
This rise in productivity is achieved by decreasing the amount of weld metal to be deposited. If we compare the weld volume of a narrow gap bevel to a classic preparation type 37° compound bevel on a 60 mm wall thickness pipe, this gives a volume saving in favour of narrow gap by a factor of 1:3.
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The only way to do internal bore welds, on double plates or at the back side of the Tube-sheet (Petrochemical ind.)
Our equipment makes it possible to weld in confined spaces, thus optimizing layout designs.
 MU IV - open weld head
TS 2000 - tube to tube sheet weld head
Polycar MP
Hollow shaft
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Markets - Petrochemical industry
