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The length of spiral air duct can be set according to user needs to reduce the connection between air duct and leakage. In addition, the spiral air duct can be connected by non blue connection, with small leakage. Reducing the leakage can reduce the daily operation cost and energy consumption. The spiral air duct joint is a ring joint, and the strength of the joint is much higher than that of the radial joint. Therefore, the spiral air duct can ensure that the joint is free of cracks under double working pressure. In addition, due to the high strength of spiral duct, the specification also stipulates that the thickness of spiral duct plate can be reduced by 10-15 compared with that of general circular duct plate. At the same time, the distance between the support and hanger of spiral air duct can also be longer than that of general pipeline.

安裝螺旋風管的方法有很多。訂購時，我們先決定連接的方式，然后再決定購買。連接方法包括法蘭連接方法和插座連接方法。采用法蘭連接方式安裝時，風管和管件的管徑應相同。經插座試驗，管件尺寸略小于螺旋風管管件。因此，可以計算出每個風道的規格，在安裝時可以使用每個風道的準確長度，而不需要切割長度。

There are many ways to install spiral duct. When ordering, we first decide how to connect, and then decide to buy. The connection method includes flange connection method and socket connection method. When flange connection is adopted for installation, the pipe diameter of air duct and pipe fittings shall be the same. According to the socket test, the size of pipe fittings is slightly smaller than that of spiral air duct fittings. Therefore, the specification of each air duct can be calculated, and the exact length of each air duct can be used during installation without cutting length.

鍍鋅薄板螺旋風管基本上是螺旋風管的特點，但價格僅為螺旋風管的三分之二甚至更低。到2000年，據統計，螺旋管道在美國辦公樓和地鐵中的應用已經達到。法蘭墊片應采用氣密、彈性、耐老化的連接材料制成，厚度為3-5mm，寬度不小于10mm。風管風速測量的精度不僅取決于測量儀器的精度，還取決于使用皮托管或熱球風速儀測量時儀器的支承方法和讀數方法;管道垂直安裝不得超過4m，單個直管道至少有兩個固定點;在施工中，應按要求安裝砌磚和結構管道。預埋件安裝在與金屬風道連接處，或要求土建單位配合堵漏，確保連接緊密。管道和管件的公差配合應一致。銅管的橢圓度和壁厚不均勻性應符合產品質量標準。目前使用的成品零件較多。

Galvanized sheet spiral air duct is basically the characteristic of spiral air duct, but the price is only two-thirds or even lower than that of spiral air duct. By 2000, according to statistics, the application of spiral pipe in American office buildings and subways had reached. The flange gasket shall be made of air tight, elastic and aging resistant connecting materials, with a thickness of 3-5mm and a width of no less than 10mm. The accuracy of air duct wind speed measurement depends not only on the accuracy of the measuring instrument, but also on the supporting method and reading method of the instrument when using Pitot tube or hot ball anemometer; The vertical installation of pipes shall not exceed 4m, and a single straight pipe shall have at least two fixing points; During construction, brickwork and structural piping shall be installed as required. The embedded parts shall be installed at the connection with the metal air duct, or the civil engineering unit shall be required to cooperate with plugging to ensure tight connection. The tolerance fit of pipes and fittings shall be consistent. The ovality and wall thickness non-uniformity of copper pipe shall meet the product quality standards. At present, many finished parts are used.

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