It uses an inert shielding gas and filler metal to protect the weld, which is created with a non-consumable tungsten electrode. Tungsten Inert Gas is another arc welding process. The thick layer of flux suppresses the ultraviolent radiation and fumes present with shielded metal arc welding. Granular flux protects the molten weld and arc zone from atmospheric contamination. Submerged Arc Welding (SAW)Ī common arc welding process, submerged arc welding requires a continually fed consumable solid or tubular, metal cored electrode. Shielded metal arc welding requires that welders have extensive experience and skill, as it is susceptible to defects if done incorrectly.

As the weld is laid, the flux disintegrates and produces vapors that serve as a shielding gas and creates a layer of slag, which protects the welded joint from atmospheric contamination. The work piece and the consumable electrode melt, which, when cool, forms the joint. An electric current is used to form an electric arc between the electrode and the metals to be joined. Types of Welding Techniques: Shielded Metal Arc Welding (SMAW)Īlso known as manual metal arc welding or stick welding, this process uses a consumable electrode covered with flux. Modern welding techniques have evolved to offer better performance partly inspired by contemporary inspection techniques that have improved to the point that minute defects and inclusions can now be easily discovered long before a tank is ever put to use.

But while the concepts of welding remain the same, new tools, chemicals, uses, and safety standards reflect modern technology and techniques. Welding has ancient roots with evidence of welded objects dating back to the Middle Ages.

Modern welding tank