Flanging Test to ISO 8494 & DIN 50139
The flanging test to ISO 8494 and DIN 50139 is a test method in which the end of a tube is bent by 90°. The test determines, through plastic deformation, whether tubes are suitable for flange formation.
Testing of steel tubes such as the flanging test is also described in Annex 2 of ASTM A370.
The following content explains the key aspects. For standard-compliant testing to ISO 8494 and DIN 50139, it is essential to purchase the complete standard.
How is the flanging test to ISO 8494 and DIN 50139 performed?
To perform the test, the end of a tube specimen is formed into a flange with a corresponding tool until a flanging angle of 90° is achieved. The test is considered passed if the outer diameter of the flange reaches the value defined in the specification standards without crack formations in the weld seam or the tube.
The flanging test is normally performed on tubes having an outside diameter of 150 mm and a wall thickness no greater than 10 mm.
