Qualifab specializes in all types of welding and has extensive experience with the main welding procedures.
SMAW (shielded metal arc welding) or metal-arc welding with covered electrode, commonly known as stick welding. An electric current is used to fuse the solder to the workpiece. The weld is protected by the stick’s coating, which floats to the surface during the operation. Depending on the composition of the coating, the welder can work in a variety of positions. This welding process is widely used on construction sites, as it is almost impervious to drafts.
FCAW (flux-cored arc welding) is a semi-automatic or automatic welding process. An electric current is used to continuously fuse the solder to the workpiece. The electrode contains a flux that floats to the surface of the weld, much like with SMAW. The weld pool is also protected by an inert gas. However, some electrodes do not require shielding gas. This welding process is very popular due to the speed with which it yields results.
GMAW (gas metal arc welding) is similar to FCAW, but the electrode does not contain any flux. While this process is very fast, it can be hard to use in drafty environments.
GTAW (gas tungsten arc welding), commonly known as TIG, uses a strong current passing through a tungsten electrode to form a weld pool. The operation is protected by a gas and the solder is applied manually to the weld pool by the welder. GTAW is a highly accurate welding process and, as such, is most often used to solder thin pieces of metal.
SAW (submerged arc welding) is a semi-automatic process in which an electric current is used to fuse the solder to the workpiece. The weld is protected by a conductive granulated flux mechanically deposited on the weld zone. The flux helps prevent weld splatter and ultraviolet radiation from being emitted by the arc. This process is widely used for larger, thicker welds as it is capable of depositing up to 10 times more metal than SMAW.
Orbital is an automatic welding process derived from GTAW that uses a tungsten electrode and shielding gas. It is 2 to 3 times faster than GTAW. This process is generally used for welding thin-walled pipes with beautiful results. It is especially popular in the pharmaceutical and food industries.