What does the term TIG refer to in welding?

The term TIG in welding stands for Tungsten Inert Gas. This process is a type of gas tungsten arc welding (GTAW) that uses a non-consumable tungsten electrode to produce the weld. The ‘inert gas’ refers to the shielding gas, typically argon or helium, that protects the weld area from contamination by the atmosphere. This shielding is crucial as it prevents oxidation and other reactions that can weaken the weld.

By using an inert gas, TIG welding allows for high-quality, clean welds with excellent control over the heat input, making it ideal for welding thin materials and achieving precise results. The process is widely used in industries that require strong and clean welds, such as aerospace, automotive, and metal fabrication. Understanding this terminology is essential for anyone studying high-pressure piping practices, as the quality of the welds directly impacts the safety and integrity of piping systems.