Special Spec Table

Special weld symbols including flare, surfacing, and backing welds.

Practical Notes

• Symbols for special welding situations — flare, surfacing, backing. Infrequently used; refer when needed.

Key Features

• Surfacing (build-up), flare groove, flare fillet, and edge weld non-standard joint symbols
• Surfacing weld deposits alloy layer on base metal for wear/corrosion resistance
• Flare welds are for round member (pipe/bar) joints; groove angle auto-determined

Key Applications

Mining bucket build-up, valve seat surfacing, pipe-pipe T-joints, thin sheet edge welds, roll surface hardening