TDC flange is the advanced technique in the world to manufacture
square duct. It realizes standardarzation, automation and mass
production during producing rectangle flanges. Compared with
traditional method for making angle iron flange, it features in
saving materials, saving time, easy operation, high effeciency,
good leak-proofness, nice durability and solid connection.
Therefore, it is very suitable for making rectangle ducts with big
section.
