5G Welding Position Explained

Written By: Liam Bryant

5G welding position refers to the fixed position pipe welding where the pipe remains horizontal while the welder maneuvers around it. This unique welding position requires a mix of skills and techniques to achieve the optimal weld.

welding positions

What is 5G Welding Position?

5G stands for the fifth position of groove welding in the world of welding. But unlike other welding positions such as the horizontal or flat position, the ‘G’ in 5G refers to a position that involves a pipe, not a plate.

In the 5G welding position, the pipe is fixed horizontally. Yes, you heard it right – fixed. The pipe remains static, and the welder navigates around it. This distinguishes it from basic welding positions where the workpiece can often be manipulated.

The unique characteristic of the 5G position is that it brings together elements of vertical, overhead, and horizontal welding positions. Thus, it demands more versatility from the welder.

Where Do You Use 5G Welding?

5G welding is typically used in industries where large, heavy pipes are prevalent. Think of oil, gas, and petrochemical plants or in the construction of inclined towers. Even within the water transportation industry, this welding method is often used.

I remember working on a large-scale construction project that involved assembling a network of hefty pipes. Moving these massive pipes was nearly impossible, so the 5G welding position was an absolute lifesaver.

Characteristics Of The 5G Welding Position

The 5G welding position can be broken down into three different areas: the root pass (bottom of the pipe), the fill and cap passes (middle), and the final cap pass (top). Each area requires different techniques, and understanding this aspect can greatly improve your welding skills.

For instance, while welding the root, the pipe often seems to be in the flat position. However, as you move upwards and your angle changes, it transitions into a vertical welding position. By the time you reach the overhead position, you are welding downhill.

One aspect I have found challenging, yet satisfying, about the 5G position is how it forces me to adapt my welding technique with every pass. It’s an art form that requires a lot of patience and skill.

What is the Qualification Range for 5G?

In the world of welding, getting certified in the 5G position also qualifies you to weld pipes in the 1G and 2G positions. However, it’s important to note that while a 5G certification covers these basic positions, it doesn’t cover the 6G position – a more complex variant of pipe welding.


One of the significant advantages of 5G welding is the ability to work with bulky, immovable pipes. It’s ideal when the welder cannot easily maneuver the workpiece.

Moreover, mastering the 5G position equips you with skills necessary for vertical, horizontal, and overhead positions, which enhances your versatility as a welder.


The 5G welding position is not without its challenges. Transitioning from flat to horizontal to overhead positions requires constant adaptation and can be tricky, especially for beginner welders.

Additionally, working in this position for extended periods can be physically demanding. Trust me, it can be quite a workout!

5G vs 6G Welding Positions

While both 5G and 6G are used for pipe welding, the latter is considered more complex and challenging. In the 6G position, the pipe is fixed at a 45-degree angle, creating a hybrid of all basic welding positions, including the inclined.

In my experience, the 6G position demands a higher level of skill and control from the welder. However, a certification in 6G includes all other positions, making it a highly valuable qualification for any welder.


5G welding is a versatile and practical position that’s particularly useful when dealing with large, heavy pipes. Though it comes with its share of challenges, mastering this position can significantly broaden a welder’s skill set.

So, whether you are a beginner or a seasoned welder, don’t shy away from the 5G position. Embrace the challenge – the satisfaction of conquering this complex welding position is truly rewarding.