Tee Joint Welding

In welding, knowing different types of joints is important, so that one can choose the right kind of joint for an application. In this article, we shall see in detail about ‘T’ 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

Welding Distortion and Warpage

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: All You Need To Know

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 … Read more

Oxyfuel Welding Safety Precautions

The following oxyfuel welding safety precautions should be observed: Do not experiment with torches or regulators in any way. Do not use oxygen regulators with acetylene cylinders. Do not use any lubricants on regulators or tanks. Always use the proper tip or nozzle, and always operate it at the proper pressure for the particular work … Read more

Welding Machines: Safety

The use of welding machines requires some basic safety considerations. When electric generators powered by internal combustion engines are used inside buildings or in confined areas, the engine exhaust must be conducted to the outside atmosphere. Check the welding equipment to make sure the electrode connections and the insulation on the holders and cables are … Read more

Electric Welding Circuits

a. A shock hazard is associated with all electrical equipment, including extension lights, electric hand tools, and all types of electrically powered machinery. Ordinary household voltage (115 V) is higher than the output voltage of a conventional arc welding machine. b. Although the ac and dc open-circuit voltages are low compared to voltages used for … Read more

Gas Shielded Arc Welding Safety Precautions

** POTENTIAL HAZARDS** When any of the welding processes are used, the molten puddle should be shielded from the air in order to obtain a high-quality weld deposit. In shielded metal arc welding, shielding from the air is accomplished by gases produced by the disintegration of the coating in the arc. With gas shielded arc … Read more

Multilayer Welding

Multilayer Welding or Multiple layer welding is used when maximum ductility of a steel weld is desired or several layers are required in welding thick metal. Multilayer welding is accomplished by depositing filler metal in successive passes along the joint until it is filled (fig. 10-20). Since the area covered with each pass is small, the weld … Read more