Bellow forming machine 1. Seam welding machine 2. Hydraulic Bellow Forming Machine: DN25-DN100mm 3. Hydraulic Bellow Forming Machine: DN100-DN400mm 4. Automatic Punch Bellow Forming Machine: DN100-DN600mm 5. Automatic Punch Bellow Forming Machine: DN700-DN4000mm 6. Shear machine 7. Bellow 8. Expansion joint