What type of pass is best for the cover of a 2G?

What type of pass is best for the cover of a 2G?

• A. Bird's Eye
• B. Stringers
• C. Weave
• D. Traveler

Answer: (B)

For a cover pass on a groove weld in the 2G position, the goal is a smooth, flush finish with controlled reinforcement and minimal heat distortion. Using stringer beads achieves this best because each pass is a straight, narrow deposit laid along the weld line. This keeps the surface even, avoids excessive buildup, and reduces heat input compared to broader, multi-direction patterns. The result is a clean cover that seals the weld without creating hollows or oversized contours. In contrast, a weave pattern spreads the filler over a wider area and generates more heat, which can lead to a rough surface, potential distortion, and slag entrapment—unwanted for a final cover layer. The bird’s-eye pattern produces a textured surface with irregularities that don’t provide the smooth finish engineers typically require on the cover. The traveler approach isn’t ideal for finishing a cover pass either, as it doesn’t yield the same controlled, flat surface finish needed at the top of the weld.

For a cover pass on a groove weld in the 2G position, the goal is a smooth, flush finish with controlled reinforcement and minimal heat distortion. Using stringer beads achieves this best because each pass is a straight, narrow deposit laid along the weld line. This keeps the surface even, avoids excessive buildup, and reduces heat input compared to broader, multi-direction patterns. The result is a clean cover that seals the weld without creating hollows or oversized contours.

In contrast, a weave pattern spreads the filler over a wider area and generates more heat, which can lead to a rough surface, potential distortion, and slag entrapment—unwanted for a final cover layer. The bird’s-eye pattern produces a textured surface with irregularities that don’t provide the smooth finish engineers typically require on the cover. The traveler approach isn’t ideal for finishing a cover pass either, as it doesn’t yield the same controlled, flat surface finish needed at the top of the weld.