What is Welding Sequence in Welding?

Welding sequence is the order in which weld beads are deposited in a weldment. It is a critical factor in welding, as it can affect the final properties of the weldment. The most common welding sequences are:

Stringer Beads: In this sequence, the welder deposits a series of small beads, called “stringer beads.” This is the most common welding sequence, as it provides good weld coverage and strength.
Skip Welding: In this sequence, the welder skips over areas when depositing weld beads. This can be used to save time or heat input, but it can also create weak spots in the weldment.
Staggered Welding: In this sequence, the welder alternates between depositing beads on one side of the joint, and then the other. This helps to evenly distribute heat input and can produce a stronger weldment.

The welding sequence is typically chosen based on the desired properties of the final weldment. Stringer beads are often used for weldments that will be subject to high stresses, as they provide good weld coverage and strength. Skip welding is often used for weldments that do not need to be as strong, or for time-saving purposes. Staggered welding is often used for weldments that require good heat distribution, such as those that will be subject to high temperatures.

What is the purpose of weld sequencing?

The purpose of weld sequencing is to ensure that the final weldment has the desired properties. The welding sequence can affect the strength, coverage, and heat distribution of the weldment, so it is important to choose an appropriate sequence for the application.

What is a back-step sequence in welding?

The back-step sequence is a welding sequence in which the welder deposits weld beads on one side of the joint, and then goes back and depositors beads on the other side. This helps to evenly distribute heat input and can produce a stronger weldment.

Avoid welding distortion

Welding distortion is an undesirable side-effect of welding and can be caused by a variety of factors. One of the most important factors is weld sequence. Stringer bead welds tend to cause more distortion than skip welding or staggered welding. Therefore, if distortion is a concern, it is important to choose an appropriate weld sequence.

Welding sequence plan

When designing a weldment, it is important to consider the desired properties of the final weldment and choose an appropriate welding sequence. The most common welding sequences are stringer beads, skip welding, and staggered welding. Each of these sequences has its own advantages and disadvantages, so it is important to select the right one for the application.