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Therefore, it is necessary to master the technical characteristics of the multi-functional silencing pipe, be familiar with the construction drawings, understand the relevant conditions of civil engineering and other types of work with this type of work, and verify whether the elevation, axis, reserved holes and embedded parts of the air duct system meet the installation conditions. Prepare all kinds of auxiliary materials for installation, prepare hoisting machines and other tools for installation, and mark and position the air duct system. What should be paid attention to in the installation of galvanized air duct?

風(fēng)管的組對：將成品或預(yù)制好的風(fēng)管運至安裝地點，結(jié)合實際情況進行檢查、復(fù)核，再按編號進行排列，風(fēng)管系統(tǒng)的各部分尺寸和角度確確無誤后，即開始風(fēng)管組對工作。風(fēng)管各管段之間的連接采用法蘭連接，接口處要求嚴(yán)密不漏風(fēng)。一次吊裝風(fēng)管的長度要根據(jù)建筑物的條件，風(fēng)管的壁厚，吊裝方法和吊裝機具配備情況確定，組對好的風(fēng)管可把兩端的法蘭做為基準(zhǔn)點，以中間法蘭為測點，拉線測量風(fēng)管的連接是否平直，偏差大時要進行調(diào)整。

Assembly of air duct: the finished or prefabricated air duct shall be transported to the installation site, checked and rechecked in combination with the actual situation, and then arranged according to the number. After the size and angle of each part of the air duct system are correct, the assembly of air duct shall be started. The connection between each pipe section of the air duct adopts flange connection, and the interface is required to be tight without air leakage. The length of the air duct for one-time hoisting shall be determined according to the conditions of the building, the wall thickness of the air duct, the hoisting method and the allocation of hoisting machines and tools. For the assembled air duct, the flanges at both ends can be used as the reference point, and the middle flange can be used as the measuring point. Draw a line to measure whether the connection of the air duct is straight. If the deviation is large, it shall be adjusted.

不銹鋼板的強度要比普通鋼板高，用不銹鋼板咬口前，要作成形試驗，避免使設(shè)備負荷作業(yè)，形成過度磨損或機械事端。由于鋁板塑性差，咬口成形時容易開裂，施工前也要作成形試驗，同時，因鋁板缺乏彈性，鋁板風(fēng)管不能進行按扣式咬口。鍍鋅風(fēng)管的鋅鍍層經(jīng)鈍化處理、染色或涂覆護光劑后，能明顯提高其防護性和裝飾性。

The strength of stainless steel plate is higher than that of ordinary steel plate. Before biting with stainless steel plate, the forming test shall be conducted to avoid excessive wear or mechanical trouble caused by equipment load operation. Due to the poor plasticity of the aluminum plate, the undercut is easy to crack during forming, and the forming test shall also be carried out before construction. At the same time, due to the lack of elasticity of the aluminum plate, the aluminum plate air duct cannot carry out snap type undercut. The zinc coating of galvanized air duct can significantly improve its protection and decoration after passivation, dyeing or coating with light protection agent.