46 Modern Welding Figure 3-1. Basic welding joint designs. Note that there are only fi ve basic joints, but that many types of welds can be placed on each type of joint. (AWS A3.0:2010, Figure 1, Joint Types, reproduced with permission from the American Welding Society, Miami, Fl.)) Joint & welding symbol Edge of base metal/plastic Surface of base metal/plastic Joint Joint Applicable Welds Bevel-groove U-groove Flare-bevel-groove V-groove Flare-V-groove Edge J-groove Seam Square-groove Applicable Welds Fillet Slot Bevel-Groove Spot Flare-Bevel-Groove Seam J-Groove Projection Plug Braze Joint Joint Joint Joint Applicable Welds Bevel-groove U-groove Flare-bevel-groove V-groove Flare-V-groove Edge-flange J-groove Braze Square-groove Applicable Welds Applicable Welds Fillet Slot Bevel-groove Spot Flare-bevel-groove Seam J-groove Projection Square-groove Braze Plug Fillet V-groove Bevel-groove Plug Flare-bevel-groove Slot Flare-V-groove Spot J-groove Seam Square-groove Projection U-groove Braze Corner Joint Butt Joint T-Joint Edge Joint Lap Joint