Ventilation Pipe Flange Machine The ventilation pipe flange machine is a professional device for HVAC, fire smoke exhaust and dust removal duct processing. It continuously rolls and forms galvanized steel and stainless steel sheets, completing TDF common plate flanges, angle iron flanges and round flanges in one pass. Suitable for sheet thickness of 1.5–3 mm, it features servo feeding, hydraulic cutting and non‑stop continuous production. Equipped with PLC control, it ensures