Why 6G is the ultimate test: Passing a 6G test qualifies you for all other positions (1G, 2G, 5G). Failing it means going back to practice.
| Position | Pipe Axis | Pipe Rotates? | Weld Orientation | Difficulty | | :--- | :--- | :--- | :--- | :--- | | | Horizontal | Yes | Flat | Low | | 2G | Vertical | No | Horizontal | Medium | | 5G | Horizontal | No | Vertical (up/down) | High | | 6G | 45° Incline | No | All positions | Very High | welding positions for pipe
Mastering pipe positions is a progression. A student usually begins with 1G to learn puddle control, progresses to 2G and 5G to learn how to fight gravity, and ultimately attempts 6G to demonstrate full mastery of pipe manipulation. For inspectors and engineers, understanding these positions is critical for specifying the correct procedure and verifying welder certifications. Why 6G is the ultimate test: Passing a
In the 2G position, the pipe is fixed vertically (standing up). The axis of the pipe is vertical, but the weld is deposited horizontally around the circumference. | Weld Orientation | Difficulty | | :---
The 5G position involves a pipe placed horizontally (similar to 1G), but the pipe is fixed and cannot rotate. The welder must move around the pipe to complete the weld.
The pipe is horizontal and stationary. The welder must move around the pipe, performing flat, vertical, and overhead welding in one pass. 45° Incline Fixed