The terms welds and joints are not synonymous. The different types of welds are groove weld, fillet weld, seam weld, flash weld, plug weld, upset weld, spot weld, surfacing weld, etc. These are not joints, but welds. The types of joints are only five, as we shall see in this article. In order to describe … Read more
Welding consumables are an important part of welding. Having a quality electrode in hand is vital to the quality of joint to be made. In this article, we shall see some aspects of electrodes and filler rods used for welding. The most authoritative classification of welding consumables has been done by American Welding Society (AWS). … Read more
The classification system for SMAW electrodes is identical between AWS (American Welding Society) and ASME BPVC. In this article, we shall take reference from ASME BPVC Section II Part C for studying various electrode classification. The SMAW electrodes are classified under the following specifications in ASME Section II Part C. SFA 5.1: specification for carbon … Read more
In this article, we shall see an introduction on the various types of oxy acetylene welding flames, how to identify them by their appearance, lighting the acetylene torch to obtain a flame, and temperatures observed in the various portions of the flame. Later on, each kind of flame has been discussed in some detail, including … Read more
Warpage in welding and residual stresses occurring in welds are a nuisance for any welding engineer. The distortion spoils the aesthetic appeal of the product, and affects its usability for the intended purpose. Residual stresses can give rise to initiation of fracture in the metal, which can result in catastrophic failure. Therefore, it is important … Read more
Multipass welding is typically required when thick sections are required to be welded. This technique is used in the industry for joining of thick sections, carrying out repairs, build ups, surface hard-facing and so on. As the name suggests, multipass welds consist of multiple passes of welding in a joint. One pass of the weld is generally … Read more
The gases stored in the gas cylinders used for oxy-acetylene welding are originally at very high pressure, and cannot be directly used as such. Here, the oxygen and acetylene regulators play an important role in reducing this pressure to a working pressure. These regulators enable maintaining a constant desired pressure at the point of delivery, at a … Read more
The corner joint welding is used to join two members that are located at approximately right angle to each other in the form of a âLâ. It is an easy to assemble joint, the edge-preparation for this joint is quite uncomplicated, and it can be used to produce joints in thin as well as thick … Read more
It is important to know different types of joints in welding, so that one can choose the right kind of joint for an application. In this article, we shall see in detail about âTâ joint welding, the kinds of edge preparation in welding of such joints, and some of the difficulties associated in welding of tee joints. … Read more
Metal tests enable us to identify metals for welding. Any welding procedure must take into account the chemical composition and mechanical properties of the base metal. Metal tests enable us to identify a metal, and establish its properties. When the behaviour of metal is known, then a compatible filler metal can be chosen, and the … Read more