Weld Symbols

The number of plugs or slots is given in parentheses above or below the weld symbol The arrow-side and other-side designations indicate which

From the straightforward groove welds that unite metals edge to edge, to the intricate plug and slot welds that braid materials together, each

plug slot Standard Location of Elements of a Welding Symbol Finish symbol Contour symbol Root opening; depth of filling for plug and slot welds Groove weld size

plug weld vs slot weld Single-U butt weld 8 Single-U butt weld 9 Backing run; back or backing weld 10 Fillet weld 11 Plug weld; plug or slot weld