It is also important to use the correct welding technique. The edges of the hole should be free of burrs or other debris that could prevent the electrode from making good contact with the metal. The key to making a successful plug weld is to create a clean, unobstructed hole for the weld to penetrate. How is a plug weld made?Ī plug weld is made by drilling a hole through one member of a joint, with the hole being slightly larger than the diameter of the electrode used for welding. A plug weld has a round hole, while a slot weld has an elongated hole. The main difference between plug welds and slot welds is the shape of the hole that is drilled into the metal. Plug welds and slot welds are both types of welding used to join two pieces of metal together. When properly executed, a plug weld can be just as strong as a butt weld. Plug welds can also be used to reinforce an existing butt weld. Where is a plug weld used?Ī plug weld is typically used in situations where it is not possible or practical to make a butt weld, such as when joining two pieces of metal that are not perfectly aligned. When used properly, they can provide a strong, reliable join between two pieces of metal. Plug welds are an essential part of many welding applications. In GTAW, a tungsten electrode is used to create the arc, and a separate wire is used to provide the filler material. In SMAW, an electrode is used to provide the filler material and create the arc. Plug welds are typically made with an arc welding process, such as: Partial penetration plug welds only extend partway through the thickness of the metal. Full penetration plug welds extend all the way through the thickness of both pieces of metal being joined. There are two main types of plug welds: full penetration and partial penetration. Plug welds are used to join sheets or plates of metal together, as well as to join tubing or pipes to flat surfaces. The hole is usually drilled slightly larger than the diameter of the electrode used for welding. A plug weld is a circular weld made through a hole in one member of a lap or T joint.
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March 2023
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