The common plate flange machine is one of the two major systems in the world for flange connection of ventilation pipes. It has the characteristics of low cost, good sealing performance, and convenient and simple installation. It makes the rectangular flanged air pipe processing and manufacturing standardized, batched and mechanized. This machine adopts heavy-duty chassis, arc-welded steel frame, high-quality motor, high-precision bearings, rollers and shafts are all quenched and externally fine-grinded to ensure a strong and durable structure, rapid and accurate forming, and long service life. This machine can adjust the width (300-1500mm) according to user needs, and both sides can be formed at the same time. Convenient and fast, this machine has inserts.