Types of joints in welding

Understanding Joints in Welding

A joint is the connection point between two components being joined together, or it can also refer to the specific arrangement of these components. Importantly, the type of joint is not determined by the welding process employed. Below are the various types of joints commonly used:

Types of Joints

  • Butt Joint
  • T-Joint
  • Lap Joint
  • Corner Joint
  • Edge Joint
  • Cruciform Joint

1. Butt joint:

A connection between the ends or edges of two parts that form an angle of 135 to 180 degrees at the joint.

2. T-joint:

A connection between the end or edge of one part and the surface of another part, forming an angle greater than 5 degrees and up to 90 degrees at the joint.

3. Lap joint:

A connection between two overlapping parts that form an angle of 0 to 5 degrees at the weld or welds.

4. Corner Joint:

A connection between the ends or edges of two parts that form an angle greater than 30 degrees but less than 135 degrees at the joint.

5. Edge joint:

A connection between the edges of two parts that form an angle of 0 to 30 degrees at the joint.

6. Cruciform Joint:

A connection where two flat plates or bars are welded to another flat plate at a 90-degree angle and aligned on the same axis.

 

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