What is the depth dimension for a flare-V-groove weld measured from?

The depth dimension for a flare-V-groove weld is measured from the point of tangency. This is because the point of tangency is defined as the location where the weld face meets the base metal at the edge of the groove. In a flare-V-groove weld configuration, which typically indicates a design where one part of the joint flares out, measuring from this point provides a consistent reference for determining the weld's effective depth.

By referencing the point of tangency, welders and engineers can ensure that the weld's dimensions are uniform and meet the specified requirements for strength and performance. This method of measuring also aligns with industry standards and practices, contributing to better quality control and consistency in the execution of the weld. Understanding this measurement point is crucial for achieving the desired weld properties and ensuring the integrity of the joint.