Other than V, there are also several other shapes that are commonly used, please refer to figure 3 below.Ī tee joint is a joint on which the base metal is perpendicularly configured to each other and the welding is done as a fillet weld on one side or both sides of the joint. Each of the weld faces is chamfered within a certain angle and together it makes the V shape. The single V and bevel are the most commonly used. In thicker material, there are many options for groove shape. Depending on the strength requirement, for lesser strength but faster welding, the joint is configured to be a closed joint, meaning that there’s no gap where the weld metal can penetrate, when there’s a gap between the parent metal it becomes an open joint, allowing the molten weld metal to penetrate along the thickness and creating a wider bond for greater strength. In thinner material, the groove is usually left unaltered, making the letter I shape, thus sometimes called the “I” groove. The shape of the groove is varied and engineered for the sake of joint strength. Basically, both metal in this joint is configured to align on the same plane and the side of each base metal will be joined by welding. Those variations include the shape of the groove, the width of the gap, layer variation, and any other process. It’s relatively easy to prepare and there are many variations that can be applied to manipulate the desired result. This type of joint is the most commonly used welding joint. There are 5 Types of Welding Joints and the Picture. The measurement is not just the throat but also a leg, which is non-existent in the butt weld. To simplify things, the measuring element is like those of a triangle. While on fillet weld, it’s a little bit complicated. It’s a little bit simpler on butt weld because the geometry is not that complicated, the measurement can be done parallel to the thickness plane of the base metal. The measurement of weld size is also different on either butt weld or fillet weld. The size is also entirely based on the preference of the welder. A root face is the thickness of the root to prevent excessive penetration or melt through. In an open joint, there’s an opening between two base metals to allow the weld to melt through, this opening is called root opening or gap and its size is entirely based on the welder’s preference. Depending on the design, the joint could be an open or closed joint. For the later, the element measured is not the angle of the groove but instead the fillet radius of the groove.Īnother important element is the root.
The earlier method is best when being used to measure the angle in bevel or V-shape groove, however, it doesn’t work for U or J-shape groove. Different measuring methods may be needed when dealing with different groove shapes. In fillet weld, the measurement is only based on the perpendicularity of the joint configuration while in butt weld the measurement can be done on each bevel or just the groove angle. This makes measuring the angle of those two types of weld a little bit different.
It’s a little bit different in fillet weld, where mostly the joint is fixed to be perpendicular and is not commonly beveled. Mostly the material is chamfered on the same angle each, so a bevel angle is half of the groove angle. The bevel angle or groove angle is varied depending on the required strength and metal thickness. Several things that you should note for yourself when you’re welding or inspect a joint are its angle, its groove shape, its root, and its weld size. While there are other variations of joint, the element that made a joint doesn’t vary that much. Figure 2 above should tell you the parts of a single joint (groove welded and fillet welded) that you need to know. Before we talk about different welding joints we should understand the anatomy of a single joint.