How is a weld's size typically measured?

A weld's size is typically measured using a weld gage or calipers due to the precision required in assessing weld dimensions. Weld gages are specialized tools designed specifically for this purpose, allowing for accurate measurement of features such as weld throat, leg lengths, and width. Calipers can also be used for similar measurements, providing the ability to verify that welds meet the specified requirements outlined in welding codes and standards. These methods ensure that the welds are not only functionally sufficient but also comply with safety regulations.

While other methods, like using a standard ruler or performing visual inspections, might give a general idea of weld size, they do not provide the same level of accuracy needed for compliance and quality assurance. Ultrasonic testing, on the other hand, is useful for detecting internal flaws in welds, but it does not measure the physical dimensions or size directly. Thus, using a weld gage or calipers is essential in determining the precise weld size necessary for successful pipeline integrity and safety.