The different orientations in which welding can be done are referred to as welding positions. By taking into account elements like gravity, accessibility, and the flow of molten metal, these positions are designed to ensure that welders can join materials effectively in various arrangements.
For welders to produce high-quality welds across various applications, familiarity with welding positions is crucial.
A welder must adopt specific postures towards the workpiece for welding. Due to gravity, welding positions affect the flow of the molten electrode to the workpiece. To achieve a good weld, a welder must be familiar with various welding positions that are suitable for a specific operation.
The most common type of welding performed in the fabrication world is fillet and groove welding. The four basic welding positions, flat, horizontal, vertical, and overhead, can yield these two welds. Well, in this reading, we’ll explore what welding position is, and its 4 common types
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What is a Welding Position?
Welding positions are essential for joining metals. These are the angles at which metal joining takes place. Consisting of four types: horizontal, flat, vertical, and overhead. The most common types of welds are groove and fillet welds, which can be performed in all four positions.
Fillet welds combine two parts of metal vertically or slightly at an angle, while groove welds require full penetration for strong welds.
Special letters are used to designate fillet and groove welds. For groove welding positions, numbers and letters are used: 1G (flat), 2G (horizontal), 3G (vertical), 4G (overhead), 5G (uphill/downhill vertical), and 6G/6GR (overhead vertical welding position).
For fillet welding positions, numbers and letters are used: 1F (flat), 2F (horizontal), 3F (vertical), and 4F (overhead).
Diagram of Welding Positions
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What are the Types of Welding Positions?
The various kinds of welding positions are flat position, also known as 1G and 1F; horizontal position, also known as 2G and 2F; vertical position, 3F and 3G; and overhead position.
Flat positions (1G and 1F)
A flat welding position is effortless to perform, and it can be learned in a short timeframe. It is also known as the downhand position, as it involves welding on the top side of the joint. The molten metal is drawn down into the joint, making it a fast and easy welding process. Number 1 is used to represent flat welding, indicating the first welding position. G and F represent groove and fillet welding.
Horizontal position (2G and 2F)
The horizontal welding position is a little more difficult when compared to the flat welding position. A welder is expected to practice and perfect the position before performing it.
Place the weld axis in a horizontal plane, or approximately horizontal, to perform 2G, a groove weld. The face of the joint should be in approximately a vertical plane. In the fillet welding position, which is 2G, the welding is done on the upper side of the surfaces, which is approximately horizontal and lies against an approximately vertical surface. The welding torch is usually held at a 45-degree angle.
Vertical position (3F and 3G)
In the vertical welding position, the plate and the weld lie vertically or almost vertically. The force of gravity pushes the molten metal downward and it tends to pile up. In other words, we can infer either an upward or downhill vertical position.
The welder positions the flame upward and holds it at a 45-degree angle to the plate in the upward vertical position. The welder can achieve this by using the metal from the lower parts of the workpiece to weld against the force of gravity.
While downhill, the metal from the upper parts and the electric arc’s kinetic force are used. The 3F and 3G are the vertical fillet and vertical groove positions.
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Overhead Position
This is the fourth welding position. You perform it from the underside of the joint area. The overhead welding position is the most difficult. In this position, the metal deposited at the joint tends to sag on the plate, resulting in a bead with a higher crown.
Applying a small molten puddle to the joint can prevent this. And if the weld puddle is too large, the flame should take off for a few moments to cool the molten metal.
What is G6 Welding Position?
The 6G welding position, also known as the overhead weld position or welder certification test position, is a challenging and complex task for welders. This position involves positioning one pipe at a 45° angle to the other, making it the most complex and challenging position for welders.
The position consists of three welds: horizontal (difficult), flat (easy), and vertical (demanding). The downward flow of filler metal is the main cause of difficulty. In a vertical position, this challenge increases due to the need for overhead welding.
Welders need extensive practice in this position before performing actual welds. Certified welders rarely face this position in the industry, but it is a common pre-employment test for them. The main use of this position is for the fabrication and installation of pipes and pipelines in chemical plants, oil and gas plants, and industrial plants.
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Conclusion
Welding positions are those where welding can take place. Flat, horizontal, vertical, and overhead positions are the four most common types of welding positions. The most common configuration, known as flat, features a horizontal welding surface.
Gravity’s effects are negligible, which makes it simpler to manage the weld pool. In the horizontal position, welding is done along a horizontal joint while the molten metal is affected by gravity.
Gravity has a considerable impact on the weld pool in the vertical position, which necessitates welding in an upright position. The hardest position for welders to operate in is the overhead because they have to fight gravity.
Every welding position has its own particular difficulties and needs a specific set of skills to provide the best outcomes. To adapt to various project needs and produce high-quality welds, welders must master these positions.
Welders can assure the integrity and quality of their work across a wide range of applications by being aware of the requirements and features of each welding position.
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