Laying more than one bead into the same weld joint is known as a multiple-pass weld.
The illustrations in the following figure show the sequence for laying multiple pass
beads into a single “V” butt joint.
NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to
thoroughly chip and brush the slag off each completed weld bead before making
another pass or the next pass will be of poor quality.
Fillet Weld Joints. Most fillet weld joints, on metals of moderate to heavy thickness,
will require multiple pass welds to produce strong joint. The following figure will show
the sequence of laying multiple pass beads into a T fillet joint and a lap fillet joint.
4.5 Spot Welding
There are three methods of spot welding: Burn-Through, Punch and Fill, and Lap.
Each has advantages and disadvantages depending on the specific application
as well as personal preference.
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