FLATTENING TEST ON TUBES

The flattening test on tubes is mainly utilized for the verification of macroscopic external and internal defects as well as the assessment of deformability. During flattening of the tubes cross section up to a certain limit value, no initial cracks may occur and no internal and external defects may become visible.

RING FLATTENING TEST

A tube sample 4” - 6” in length is flattened between parallel plates with the weld 90° from the direction of applied force until opposite walls of the tubing meet. Applications for this test along with the flaring test include situations where round tubing is to be formed into other shapes