This European Standard specifies a method for a ring expanding test on tubes, that is used to reveal defects both on the surfaces and within the tube wall by expanding the test piece using a drift until fracture occurs. It may also be used to assess the ability of tubes to undergo plastic deformation.
The ring expanding test is applicable to tubes having an outside diameter from 18 mm up to and including 150 mm and wall thickness from 2 mm up to and including 16 mm.