It refers to the semi-rigid spiral-seams ducts. Made of aluminum tape width of 50-65 mm and a thickness of 0.1 mm, by rolling on its edge rib special profile and connecting the castle. Then, to get a given diameter corrugated aluminum pipe on special rollers give birth to a profile in the lock by connecting the strip edges together in a spiral. Common standards on the diameter of the pipe does not exist. The most common aluminum pipe with diameters ranging from 75 to 310 mm. But we can supply the corrugated aluminum with a diameter up to 500 mm and the wall to 1.4 mm. Consumer corrugated pipe is supplied as a compact compressed pipe length not exceeding 700 mm, which are then stretched to a length of 3-4 meters. Since the corrugated aluminum tube has sufficient stiffness and good flexibility, it is widely used for non-industrial installation of ventilation systems. Bend radius of the duct may be equal to the diameter of the pipe, enabling the ducts laid without any additional fittings. This can significantly reduce the cost of materials and ease of installation and reduces its cost. The connection parts of air ducts are carried out by means of: direct and reduction of connectors, tees, crosses and knees respective diameters. In cases where a reliable fastening of pipes, the connection is allowed by means of mounting tape. Grounding corrugated aluminum does not require, as in the ventilation systems of its static electricity is not available. The temperature range that can withstand pipe - from -30 C to +80 C. It has high resistance to corrosion. The main drawback of these pipes is a high thermal conductivity, which resulted, in some cases, moisture can form inside the duct can occur. To avoid this, it is necessary to isolate the separate sections of the ventilation system. The second drawback - the inability to withstand high temperatures for a long time. Therefore, as the smoke from the exhaust of the boiler, fireplace or column corrugated aluminum tube is not used.

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