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Gas Tungsten Arc Welding (Tig Welding)

• Introduction Of Gas Tungsten ARC Welding:
Gas Tungsten Arc Welding (GTAW), commonly referred to as Tungsten Inert Gas (TIG) welding, is a versatile
and precise welding process used in various industries, including aerospace, automotive, and manufacturing.
Developed in the 1930s, TIG welding involves creating an arc between a non-consumable tungsten electrode
and the workpiece, while a shielding gas, typically argon or helium, protects the weld area from atmospheric
contamination.
• Definition:
Gas Tungsten Arc Welding (GTAW), commonly known as Tungsten Inert Gas (TIG) welding, is a welding
process that uses a non-consumable tungsten electrode to produce an arc between the electrode and the
workpiece. The welding area is shielded from atmospheric contamination by an inert gas, typically argon or
helium, which flows through the welding torch.
• Applications:
Gas Tungsten Arc Welding (GTAW), or Tungsten Inert Gas (TIG) welding, finds extensive applications across
various industries due to its ability to produce high-quality welds with precision and control. Here are some
specific applications of TIG welding in different industries:
1 Aerospace Industries:

• TIG welding is commonly used in the aerospace industry for joining components made of lightweight materials
such as aluminium, titanium, and magnesium.

• It is employed in the fabrication of aircraft structures, engine components, fuel tanks, and other critical
aerospace parts where weld quality and integrity are paramount.
2 Nuclear Industries:

• TIG welding is utilized in the nuclear industry for welding components of nuclear reactors, pressure vessels,
piping systems, and other critical infrastructure.
• The process ensures precise and defect-free welds in materials used for nuclear applications, such as stainless
steel and nickel alloys, meeting stringent safety and quality standards.
3 Chemical and Fertilizer Industries:
• TIG welding is applied in the chemical and fertilizer industries for fabricating equipment such as reactors,
storage tanks, pipelines, and heat exchangers.
• It allows for the welding of corrosion-resistant materials like stainless steel and exotic alloys, ensuring the
integrity and longevity of the equipment in corrosive environments.

4 Power Plant Industries:
• TIG welding plays a crucial role in the fabrication and maintenance of power plant components, including
boilers, turbines, heat exchangers, and piping systems.

• It is used to weld materials such as carbon steel, stainless steel, and high-temperature alloys, ensuring reliable
performance and longevity of power generation equipment.
5 Food and Beverage, Oil and Natural Gas Storage Tanks:

• TIG welding is employed in the fabrication of storage tanks for food and beverage industries, as well as for oil
and natural gas storage.
• The process ensures hygienic and leak-free welds in stainless steel tanks used for storing food products,
beverages, pharmaceuticals, and corrosive substances.
• Equipment:
In Gas Tungsten Arc Welding (GTAW), commonly known as Tungsten Inert Gas (TIG) welding, several
essential pieces of equipment are required to perform the welding process effectively. Here’s a breakdown of
the equipment typically used:

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CITS : CG & M - Fitter - Lesson 12 CITS : CG & M - Fitter - Lesson 12