In the case of round parts, how may the length of a joint be indicated?

When indicating the length of a joint in the context of round parts, the measurement is typically expressed in degrees. This is because the joint on a circular or round part is often represented as an angular measurement, reflecting the proportion of the circumference that is being welded.

In round parts, the welding joint could be specified in terms of the arc or angle that needs to be welded. By using degrees, it allows welders to clearly understand how much of the round surface needs to be welded, especially considering that the actual linear length of that joint will depend on the diameter of the circle or round part. When interpreting welding prints, it's critical to understand that a circular joint can be more accurately defined in angular terms than linear dimensions such as inches, feet, or millimeters, as these could lead to confusion about the length of the weld on a curved surface.