Welding and Cutting
What is it for?
The welding process allows the transformation of metallic materials such as sheets, tubes, etc., into machines and structures. The cutting process enables the separation of metal sheets, structures, and pipe pieces by using flame, plasma, or laser cutting. Welding involves arc welding, where a gas shields the liquid pool from ambient air.
Air Liquide has been at the heart of the welding and cutting gases sector for over a century. We have evolved and adapted our technology and expertise to meet our customer's ever-changing requirements. Our gas solutions are constantly evolving to meet new industry standards in manufacturing.
Requirement for cutting and welding processes
Whether active or inert, welding gas is always essential in arc welding processes. It provides localised protection of the weld, which is essential to achieve the mechanical properties of the joints and allows the speed and/or the quality of the welding to be optimised, depending on the project.
The choice of the gas mixture used is therefore far from trivial!
There are several different types of processes under the term “gas flow arc welding”. Each has its characteristics and requires specific welding gases.
In the case of cutting, gas is an active component to burn, melt, vaporize or blow away excess material, thereby creating clean-cut edges.
Gases used for Welding & Cutting
Gas applications: Welding
TIG WeldingThis is an arc welding process using a non-fusible tungsten electrode (hence the name Tungsten Inert Gas). In TIG welding, the electric arc is created between the electrode (incorporated in the torch) and the workpiece under inert gas protection. At Air Liquide, we study this process thoroughly and have thus prepared our ARCAL gases to ensure smooth execution.
Laser WeldingAir Liquide has designed laser gases for every laser source per manufacturers’ specifications.
- Pure LASAL gases - are prepared under tight quality control procedures
- LASAL laser gases - includes carbon dioxide, nitrogen, and helium. These gases can be supplied individually or pre-mixed based on the laser source used.
Plasma WeldingPlasma welding is an arc welding process. The plasma arc generates the heat source required for fusion. It also has a high energy density. Air Liquide has been a pioneer in this field and in helping businesses execute the process efficiently.
MIG and MAG weldingThe main application of Metal Inert Gas (MIG) mixtures is to weld sensitive stainless steels and aluminium and copper alloys. The Metal Active Gas (MAG) welding process is mainly used for manual, semi-automatic welding or automated/robotised installations on high-alloy stainless steels or non-ferrous. We pride ourselves in the exceptional service we provide in this department.
Gas applications: Cutting
Laser CuttingAir Liquide has designed laser gases for every laser source per manufacturers’ specifications. Air Liquide’s LASAL solution helps in improving the reliability and performance of specialized laser cutting work. The laser cutting process is applied mainly on thin metals that require high precision and productivity. Air Liquide’s LASAL solution helps in improving the reliability and performance of specialized laser cutting work.
Flame CuttingOur offer includes FLAMAL brand gases, an oxy-fuel flame and straight oxygen to form a cutting jet. FLAMAL would be suitable for manual and automatic flame-cutting operations, considering the high flexibility and performance processes. This will be used in metal fabrication, shipyards, boilers, scrapping and installation.
Plasma CuttingThe plasma cutting process enables the thermal separation of metallic materials that cannot be cut by a flame and is used on all metals to secure high-quality cuts and high productivity levels. Air Liquide provides industries with the required expertise in plasma gases and helps industries execute the process effectively. We supply FLAMAL brand cutting fuel to enhance the cutting process. This is a stable, propylene-based high-energy fuel gas and is a safer and superior alternative to oxygen, propane, acetylene, and blended fuels.