Flanging Test to ISO 8494 & DIN 50139

Compression test on metal tubes

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.

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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.

Flanging Test to ISO 8494, DIN 50139, ASTM A370

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ABOUT THE AUTHOR:

Dr. Harald Schmid

Global Industry Manager for Metals – ZwickRoell GmbH & Co. KG

As Global Industry Manager, he is responsible for the industry strategy in the metals sector with a focus on market observation, further development of testing solutions and sales support in the international environment.

He has extensive experience in standardization work and is actively involved in various committees, including the international ISO committee “ISO/TC 164 Mechanical Testing of Metals” and national DIN working groups such as NA 062-01-42 AA Tensile and ductility testing for metals and NA 062-01-47 AA Impact test for metals and mechanical-technological testing of metallic pipes.

His academic career began with a degree in mechanical engineering (B.Sc. & M.Sc.) at the Karlsruhe Institute of Technology (KIT). After holding international positions in mechanical engineering, he worked as a research assistant at the Friedrich-Alexander-University Erlangen-Nuremberg with a focus on material characterization and sheet metal forming. He dedicated his doctorate to the topic of deep drawing processes with drawing beads.

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