TIG welding has low deposition rates and higher equipment costs than the other methods for pipe welding.
However, it produces very high quality welds (according to welder skill), making it perfect for critical and high-precision welding jobs..
TIG, on the other hand, uses non-consumable tungsten electrodes, which produces the highest purity welds.
Additionally, on thick wall boiler applications which are common in power plants, Thick Wall or Narrow Groove TIG welding processes may be beneficial.Jan 7, 2021.
Since the decline of flash butt welding some 10-15 years ago, joining of boiler tube has been primarily carried out by TIG welding.
TIG further offers the following options — Heterogeneous – use of filler material that is different from the base metals The TIG welding can be done manually or using orbital solutions.
Orbital welding is the preferred choice as it minimizes concerns regarding quality and joint accessibility, which is still a concern with the manual process.
The ATIG welding is able to provide full penetration welds in a single pass in square butt joints of tubes with wall thickness up to 8.0 mm, which is not possible in the conventional TIG welding process The ATIG welding is found to produce radiographic quality welds and complete bainite phase in the low alloy steel [T22] weld metal.
During fabrication, an effective way to enhance efficiency is through a detailed understanding of the prevalent welding form involved — tube to tubesheet welding.
The process of tube to tubesheet welding involves creating a joint between well-prepared tubes and tubesheet to fix them in place.
