6g Pipe Welding Position Instant

| Defect | Why It Happens in 6G | Prevention | | :--- | :--- | :--- | | | Changing angles at sides | Keep torch angle leading by 10-15° | | Slag inclusion | Gravity pulls slag into leading edge | Chip/grind after every pass; use stringers | | Undercut | Excessive heat at top edge | Pause 1 second on each side of weave | | Suck-back (concave root) | Too much gap or heat at overhead | Reduce amperage by 5-10A at 6 o’clock | | Porosity | Gas coverage lost at odd angles | Increase gas lens; check cup alignment |