The flaring test serves to establish the forming behavior of tubes or pipes which is expanded to a specific degree. This flaring test is carried out in conformity with the code requirements. The specimen to be tested is expanded in a press to the degree specified. Defects which occur as result of this process are not permissible.
Samples from each lot are tested to ensure that the hardness of the tube is within permissible limits.
This test ensures full ductility of the tubes, as well as tests the weld and the base metal strength by stretching the material to its physical endurance limit.
Flattening test mainly serves to detect microscopic internal and external flaws. It involves compressing a tubular ring between two planes parallely placed to a predetermined distance. Incipient cracks and internal or external defects which occur as result of this process are not permissible. The flattening test is conducted as described in ASTM A450 / ASTM A530 etc.
The tensile test specimen serves to determine the strength and ductility characteristics i.e. yield strength, tensile strength and elongation. Tensile tests are normally carried out at room temperature according DIN, ASTM, BS standards etc.
