Demystifying the Plug Welding Symbol

Double-U butt weld Flat single-V butt weld with flat backing run Fillet weld Convex double-v weld Plug weld

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 or slot weld symbol SLOT WELDS EFFECTIVE THROAT DEPTH OF PREPARATION OR FOR PLUG WELDS LENGTH OF WELD IN INCHES PITCH OF WELDS IN INCHES FIELD WELD

plug and slot weld Proper technique is to initiate the arc in the center and deposit weld metal in spiral layers