What groove angles need to be mastered in the welder exam?

In the welder examination, the groove angles that need to be mastered mainly include the following types:

1. Butt joint groove angle: Butt joint is the most common type of joint in welding Form, the bevel angle is generally 30°-35°. This groove angle can fully fuse the weld metal and improve the welding quality.

2. Corner joint bevel angle: A corner joint is a common T-shaped or cross-shaped joint, and its bevel angle is generally 45°-60°. This groove angle can fully fuse the weld metal and improve the welding quality.

3. The groove angle of the lap joint: The lap joint is a common form of plate butt jointing, and its groove angle is generally 30°-45°. This groove angle can fully fuse the weld metal and improve the welding quality.

4. Tubular joint bevel angle: Tubular joint is a common form of pipe welding, and its bevel angle is generally 30°-45°. This groove angle can fully fuse the weld metal and improve the welding quality.

5. Plug welding joint groove angle: Plug welding joint is a common form of filler welding, and its groove angle is generally 30°-45°. This groove angle can fully fuse the weld metal and improve the welding quality.

The selection of the above various groove angles mainly depends on the material, thickness, welding method and other factors of the welding workpiece. In actual work, welders also need to choose the appropriate groove angle according to the requirements of the welding procedure regulations and welding operation instructions. At the same time, welders also need to know how to measure and adjust the groove angle to ensure welding quality.