The starting point. The 1G tests a welder's ability to lay a solid CJP groove weld in the flat position — gravity working with you, not against you. It's the baseline, and it qualifies more than most people expect.
The 1G is a CJP groove weld in the flat position. Plate is horizontal, welding from above. It's where most welders start, and it's a legitimate qualification for a lot of shop work where parts can be positioned flat.
The test uses a 45° included angle groove, knife-edge prep, and a ¼" steel backing strip. You weld it flat. We inspect it, test it, and if it passes, you get a WPQ signed by a CWI.
| Weld Type | Positions Qualified |
|---|---|
| Groove Welds (CJP & PJP) | Flat (1G) only |
| Fillet Welds | Flat (1F) and Horizontal (2F) |
| Horizontal/Vertical/Overhead | NOT covered |
| Test Plate | Qualified Range |
|---|---|
| 3/8" | 1/8" to 3/4" |
| 1" | 1/8" to unlimited |
SMAW, GMAW, FCAW, GTAW — all qualify for 1G. The process you test on is the process you're qualified for. Changing processes later requires a new test.
Visual inspection first: no cracks, undercut ≤1/32", reinforcement ≤1/8". Then bend tests or RT (except GMAW-S which requires bends only). Pass both = WPQ issued.
Request 1G Qualification