Plug and Slot Welds

appendix - symbols for welding and inspection plug or slot weld symbol Plug Slot: The plug slot welding symbol consists of a circle with a horizontal line through the center This symbol indicates that a circular plug or slot weld symbol ISO Symbols ; Backing run: back or backing weld USA, Fold joint ; Fillet weld, Backing strip ; Plug weld: plug or slot weld USA

plug weld vs slot weld Sounds more like a plug or slot weld, with integral filler, Kenat I put a plug weld symbol with a concave surface symbol on the drawing