Reasons for choosing tungsten inert gas welding for steel pipes

Tungsten inert gas welding (TIG) is a commonly used welding method in the welding, installation, and construction of steel pipes in the petroleum, chemical, natural gas, shipbuilding, and other industries. It has good welding quality, high cost, and low efficiency. It is generally used in the welding of small-diameter important steel pipes and the base weld of steel pipes.

Features of tungsten inert gas welding of steel pipes:
1. Argon is an inert gas that does not decompose at high temperatures, does not react with weld metal, and does not dissolve in liquid metal. Therefore, it has the best protection effect and can effectively protect the molten pool metal. It is a welding method of the highest quality.
2. Argon is a monatomic gas, which absorbs exothermic decomposition reactions at high temperatures, has poor electrical conductivity, and the compression effect and cooling effect of the argon gas flow make the arc heat concentrated, the temperature high, and the arc stability good. It can burn stably even at low current.
3. The heat of argon arc welding is concentrated, and the argon gas ejected from the nozzle has a cooling effect, so the heat-affected zone of the weld is narrow and the weldment deformation is small.
4. Use argon gas to protect the slag-free, improve work efficiency, and ensure the weld is beautiful and of good quality.
5. Argon arc welding is operated with an open arc, the molten pool is well visible, easy to observe and operate, the technology is easy to master, and it is suitable for welding in various positions.
6. In addition to ferrous metals, it can be used to weld non-ferrous metals such as stainless steel, aluminum, copper, and alloy steel.

Working principle of tungsten inert gas argon arc welding of steel pipes
Tungsten inert gas argon arc welding of steel pipes is an arc welding method that uses inert gas (argon) protection. The argon gas ejected from the nozzle creates a dense gas protection layer to isolate the air during welding. In the argon laminar flow, the arc burns between the tungsten electrode and the workpiece, and uses the heat generated by the arc to melt the welded area and fill the welding wire to connect the two separated steel pipe parts together, thereby obtaining a firm welded joint.