This category contains articles that address such as welding arcs, various welding positions, weld joint design, welding polarity, multipass welding, pipe welding processes, pipe welding positions, electric welding circuits, etc.
The power source is the most important part of the arc welding equipment. In all arc welding processes, two kinds of power sources are generally used, from a voltage-ampere output characteristics point of view. One is constant current type, the second is constant voltage type. This article details the constant current type power sources in … Read more
The term arc welding is a very broad term that includes a wide variety of welding processes, that can all be grouped under this one term. As the name indicates, in arc welding – the heat of an electric arc is utilized to melt the base metal and obtain coalescence. The electric arc has a … Read more
This article describes a few aspects of forehand welding and backhand welding in oxyfuel welding process. Before we get into the specifies, let us understand a few related terms, such as work angle, push angle, travel angle, etc. Work Angle For a butt weld between two plates, imagine a plane cutting the base plates perpendicularly. … Read more
This article discusses in brief about expansion and shrinkage in welding, its effects, and remedies. Welding invariably involves heat. We know that metal expands when heated, and contracts when cooled. When molten metal is added to the joint, some of the sidewalls also get melted and get fused with the freshly deposited weld metal. This … Read more
Multilayer welding, as the name suggests, is the name given to welds which are made by using multiple layers of weld. Using multiple layers becomes necessary when welding of thick sections is being done. High thickness base metals cannot be welded with a single pass, as the resulting bead would be too big, unwieldy, and … Read more
A fillet weld gauge is one of the most important measuring tools in a welder’s kit. It is a handy tool, not just for the welders, but for QC inspectors as well, in making measurements on fillet welds. Although its principle is as simple as a standard measuring tape, it isn’t as easy to understand. … Read more
Welding techniques in piping industry have expanded significantly over the last few decades to provide better outcomes for welding tasks. As a result of it, there are plenty of welding processes and techniques present today, ultimately making it difficult to choose the right one for a specific welding job. Welders need to thoroughly understand how … Read more