TIG torches come in a range of sizes and configurations and are normally categorised by the cooling method they use – either gas or water-cooled.
Gas-cooled torches are the most common. They’re generally larger and can be used for welding currents up to around 300 amps.
Water-cooled torches dissipate heat more quickly than air-cooled versions and are typically used in applications that use high welding currents, such as for thick section aluminium components. These torches are generally smaller and easier to manipulate.
Consideration should be given to the torch head configuration – it’s vital to have a good view of your weld joint and torches that are too big or cumbersome can make it harder to see and can lead to more defects.
Torches with flexible necks, swivel heads, straight heads, or even ‘pencil’ torches have their uses in different applications, and where access is difficult or limited.