315MM Diameter 6mm thickness High Quality Factory priced Air Duct Polypropylene Pipe

Working principle of PP duct PP air ducts are used in industrial exhaust such as acid, alkali, organic waste gas, etc. By installing induced draft fans at the end, the polluted waste gas in the environment is drawn through the PP anti-corrosion fan to be discharged outdoors. PP air ducts are usually divided into positive pressure air supply or negative pressure ventilation working modes, with smooth inner wall and low resistance.

There are two types of PP ducts from the shape, one is square PP ducts, and the other is round PP ducts. From the application point of view, the amount of circular shape is relatively large. The circular PP duct is easy to manufacture. The PP sheet can be rolled into a circular tube by a plate rolling machine, and the labor and mechanical costs are relatively low. The square PP air duct is made of a PP sheet through a hot-melt bending machine, folded four times at a 90-degree angle, and then welded by a butt welding machine. Compared with square pipes with the same circumference or cross section, square pipes are more expensive and have more processes. Of course, it also depends on the wall thickness of the PP duct and whether the outer flange is reinforced.