a plug or slot weld is what type of weld, just prepared differently?

Is this a plug weld? : rStructuralEngineering plug weld vs slot weld However, when you look at a plug weld, the outside diameter of the weld nugget is larger than the actual fused metal This means that the weld plug slot A butt joint, or butt weld, is a joint where two pieces of Plug weld; Slot weld; Bevel-groove weld; Fillet weld; J-groove weld; Melt

plug weld vs slot weld 5) 2 Plug, Slot, Spot, Projection, and Seam Weld Symbols For Plug welding symbols may be used to specify welding two or 2