The complexity of 6G stems from its demand for high manual dexterity and physical stamina.
| Position | Inclination | Pipe Rotation | Difficulty (1-10) | Typical Use | | :--- | :--- | :--- | :--- | :--- | | 1G (rolled) | Horizontal | Yes | 2 | Shop fabrication | | 2G (horizontal fixed) | Horizontal | No | 5 | Horizontal pipeline | | 5G (vertical fixed) | Vertical | No | 7 | Vertical risers | | | 45° | No | 9 | All-position qualifier | | 6GR (restricted) | 45° fixed | No | 10 | With backing ring removal test | weld position 6g
| Feature | Specification | | :--- | :--- | | Pipe Inclination | 45° from horizontal | | Pipe Rotation | Not allowed (fixed) | | Weld Progression | All-around (circumferential) | | Gravity effect | Changes continuously around the pipe | The complexity of 6G stems from its demand