Testing welded and joint seams
A special form of tensile test is used for welded and joint seams. For this the specimen is removed from the pipe in such a way that the weld or joint seam is located in the free gauge-length area of the specimen. Inhomogeneous strain distribution can be anticipated, making direct extension measurement on the specimen unnecessary in this case. The result obtained is the tensile strength of the joint and, where applicable, a comparison with the tensile strength of the raw material.