How do weave passes differ from stringer passes?

• A. Weave passes are straight beads; stringer passes cover wider areas
• B. Weave passes cover a larger width by weaving; stringer passes are straight beads; selection depends on joint and process
• C. Weave passes are always stronger than stringer passes; stringer passes are cosmetic
• D. Weave passes are used only for coatings; stringer passes only for butt joints

Answer: (D)

Weave passes are used to cover a wider area of the joint by moving the electrode in a deliberate zigzag or weave pattern. This broad motion distributes the molten metal over a larger width, helping to fill wider joints and produce a blended bead profile with good fusion along the edges. Because you’re spreading metal over more of the joint in one pass, weave passes typically add more heat and create a wider, flatter bead.

Stringer passes deposit the weld in straight, narrow beads along the joint. This gives you precise control over heat input and bead shape, with less lateral spread, making it easier to manage penetration and contour, especially when you’re stitching multiple passes or working in tight joints.

The choice depends on the joint geometry, thickness, and the welding process being used. Weave passes are chosen for wider coverage and quicker filling, while stringer beads are chosen for controlled deposition and cleaner contours. The idea that weave passes are only for coatings or that stringer passes are only for butt joints isn’t accurate; both techniques apply to a variety of joint types.