"Reduced Gap Technology" (RGT) challenges conventional joint design principles

In narrow gap welding, the groove angle is typically less than 20° instead of the normal 45 to 60°. This decreases the number of weld passes needed to complete the joint, and it reduces the welding time and the consumption of filler material. It also makes the material less prone to distortion. In other words, reducing the groove volume has a multitude of positive effects on welding quality, efficiency and productivity. However, reducing the groove angle also brings more challenges to welding. In a narrow groove, the welding arc is difficult to control. This may result in quality issues, unless the user invests in welding torch and accessories that are specially designed for the application.