| Process | Suitability | Typical Use | |---------|-------------|--------------| | | Excellent | Field welding, root with E6010, fill with E7018 | | GTAW (TIG) | Excellent | Root pass on thin wall, stainless/alloy pipes | | FCAW | Good (with practice) | Heavy wall pipe, indoor/workshop | | GMAW (MIG) | Rare (poor control) | Not recommended for fixed-position 5G |
The pipe does not rotate. The welder must weld in all three basic positions around the pipe’s circumference: what is 5g welding