Advantages of common plate flange duct

The common plate flange duct, also known as the flangeless duct, is manufactured in a faster and more convenient way than the traditional rectangular duct, and has a smaller air leakage rate. The advantage of this kind of air duct is that it can save materials and reduce project investment costs; Small air leakage, reduce energy consumption, save operating costs, so it is welcomed by construction enterprises. The connection between the flanges is made of galvanized steel plate, which is formed by the flanged card forming machine and cut into a uniform size for installation and connection.

TDF common plate flanges do not need to be drilled and riveted like Angle flanges because they are integrated with pipe steel plates. However, the civil air defense project is absolutely not allowed to use common plate flange connection. The equipment required for the production of air pipes with common plate flanges includes: multi-function shearing machine, multi-function edge biting machine, multi-function rib pressing machine, common plate flanges forming machine, common plate flanges matching folding machine, multi-function Angle code and hook code punching machine. If the surface of the flange is not flat, after the rectangular flange is rotated 180 degrees, it does not coincide with the same standard flange screw hole, and the size of the inner side or the size of the two diagonal lines is not equal to exceed the allowed error, which will affect the normal assembly of the air duct components at the construction site.

Small errors can lead to unnecessary corrections and drilling during installation; Too much error can lead to rework and waste. TDF common plate flanges do not need to be drilled and riveted like Angle flanges because they are integrated with pipe steel plates. The connection of the two sections of the pipe is connected with special flange clips, and the four corners are connected with bolts after adding 90 degree flange angles. Easy to operate, improve efficiency, smooth appearance, accurate size, strong interchangeability, stable product quality. After the rectangular flange is rotated 180 degrees, it does not coincide with the same standard flange screw hole, and the size of the inner side or the size of the two diagonal lines is not equal to the allowed error, which will affect the normal assembly of the air duct components in the construction site.

Advantage: Less leakage. The installation of the spiral air duct significantly reduces the connection point between the pipe and the pipe, so that the leakage of the pipe joint is reduced to a minimum degree. The length of a typical spiral duct is 3 to 6 meters, while the length of a typical rectangular duct is only 1 to 1.5 meters. And the connection of two spiral air ducts requires only one pipe connector, while the connection of traditional rectangular air ducts usually requires a completely independent double-flange system standardized product. The production of spiral air duct accessories (fittings and joints) has been highly automated, systematic, and has industrial quality control. Low installation cost. The installation time of a circular air duct system is only 1/3 of that of a similar rectangular pipe. Usually only a small installation space is required. Without any increase in pressure drop, a circular pipe with a diameter of 200 mm can replace a rectangular pipe with a diameter of 250×150 mm in the same installation space. Without adding additional installation space, several parallel circular pipes can replace flat rectangular pipes. All things considered, circular pipes take up less space than rectangular pipes in the vast majority of cases. For the same pressure characteristics, the installation space of several circular pipes is usually the same or less than that of one rectangular pipe.