Tengtian Welded Pipe Equipment Manu is located in China and deals exclusively in the production and export of Duct Making Machines. Aluminum Flexible Forming Duct Pipe Making Machine is built with Aluminum is available in Blue color. This product is also CE / ISO 9001 certified.HVAC Duct Tdf Flange Corner Punch Forming Machine. ... Cutting and Slitting Machine, HVAC Duct Machine, Transformer Making Machine: Mgmt. Cer: , ... CNC Copper Tube Flange Hole Punching Machine for Air Conditioner, Refrigerator and Solar Heater ...Air Duct Machine. The spiral tubeformer BTF-II is for producing round air duct for various uses, such as for HVAC round ducts, oval ducts, chimney flue, posttension pipe, etc. The metal clip flexible duct forming machine making the duct mainly used in plant, automobile exhaust, sewer, shipyard, mining, municipal engineering, refrigeration ...Dec 31, 2021 · The Double layer flexible aluminum duct machine PAD-300 series is mainly used to produce the flexible air duct from aluminum strip by spiral lock forming process. The flexible aluminum duct is widely used for chimney, exhauste pipe, etc.